[PATCH 3.12 001/142] ip_forward: Drop frames with attached skb->sk

[PATCH 3.12 001/142] ip_forward: Drop frames with attached skb->sk

[Jiri Slaby]

From: Sebastian Pöhn <sebastian.poehn@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

[ Upstream commit 2ab957492d13bb819400ac29ae55911d50a82a13 ]

Initial discussion was:
[FYI] xfrm: Don't lookup sk_policy for timewait sockets

Forwarded frames should not have a socket attached. Especially
tw sockets will lead to panics later-on in the stack.

This was observed with TPROXY assigning a tw socket and broken
policy routing (misconfigured). As a result frame enters
forwarding path instead of input. We cannot solve this in
TPROXY as it cannot know that policy routing is broken.

v2:
Remove useless comment

Signed-off-by: Sebastian Poehn <sebastian.poehn@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 net/ipv4/ip_forward.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ipv4/ip_forward.c b/net/ipv4/ip_forward.c
index 31ee5c6033df..479e8a63125a 100644
--- a/net/ipv4/ip_forward.c
+++ b/net/ipv4/ip_forward.c
@@ -126,6 +126,9 @@ int ip_forward(struct sk_buff *skb)
 	struct rtable *rt;	/* Route we use */
 	struct ip_options *opt	= &(IPCB(skb)->opt);
 
+	if (unlikely(skb->sk))
+		goto drop;
+
 	if (skb_warn_if_lro(skb))
 		goto drop;
 
-- 
2.3.7

[PATCH 3.12 002/142] tcp: fix possible deadlock in tcp_send_fin()

[Jiri Slaby]

From: Eric Dumazet <edumazet@google.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

[ Upstream commit d83769a580f1132ac26439f50068a29b02be535e ]

Using sk_stream_alloc_skb() in tcp_send_fin() is dangerous in
case a huge process is killed by OOM, and tcp_mem[2] is hit.

To be able to free memory we need to make progress, so this
patch allows FIN packets to not care about tcp_mem[2], if
skb allocation succeeded.

In a follow-up patch, we might abort tcp_send_fin() infinite loop
in case TIF_MEMDIE is set on this thread, as memory allocator
did its best getting extra memory already.

This patch reverts d22e15371811 ("tcp: fix tcp fin memory accounting")

Fixes: d22e15371811 ("tcp: fix tcp fin memory accounting")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 net/ipv4/tcp_output.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 72d11b4593c8..59d4f17b1992 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2581,6 +2581,21 @@ begin_fwd:
 	}
 }
 
+/* We allow to exceed memory limits for FIN packets to expedite
+ * connection tear down and (memory) recovery.
+ * Otherwise tcp_send_fin() could loop forever.
+ */
+static void sk_forced_wmem_schedule(struct sock *sk, int size)
+{
+	int amt, status;
+
+	if (size <= sk->sk_forward_alloc)
+		return;
+	amt = sk_mem_pages(size);
+	sk->sk_forward_alloc += amt * SK_MEM_QUANTUM;
+	sk_memory_allocated_add(sk, amt, &status);
+}
+
 /* Send a fin.  The caller locks the socket for us.  This cannot be
  * allowed to fail queueing a FIN frame under any circumstances.
  */
@@ -2603,11 +2618,14 @@ void tcp_send_fin(struct sock *sk)
 	} else {
 		/* Socket is locked, keep trying until memory is available. */
 		for (;;) {
-			skb = sk_stream_alloc_skb(sk, 0, sk->sk_allocation);
+			skb = alloc_skb_fclone(MAX_TCP_HEADER,
+					       sk->sk_allocation);
 			if (skb)
 				break;
 			yield();
 		}
+		skb_reserve(skb, MAX_TCP_HEADER);
+		sk_forced_wmem_schedule(sk, skb->truesize);
 		/* FIN eats a sequence byte, write_seq advanced by tcp_queue_skb(). */
 		tcp_init_nondata_skb(skb, tp->write_seq,
 				     TCPHDR_ACK | TCPHDR_FIN);
-- 
2.3.7

[PATCH 3.12 003/142] tcp: avoid looping in tcp_send_fin()

[Jiri Slaby]

From: Eric Dumazet <edumazet@google.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

[ Upstream commit 845704a535e9b3c76448f52af1b70e4422ea03fd ]

Presence of an unbound loop in tcp_send_fin() had always been hard
to explain when analyzing crash dumps involving gigantic dying processes
with millions of sockets.

Lets try a different strategy :

In case of memory pressure, try to add the FIN flag to last packet
in write queue, even if packet was already sent. TCP stack will
be able to deliver this FIN after a timeout event. Note that this
FIN being delivered by a retransmit, it also carries a Push flag
given our current implementation.

By checking sk_under_memory_pressure(), we anticipate that cooking
many FIN packets might deplete tcp memory.

In the case we could not allocate a packet, even with __GFP_WAIT
allocation, then not sending a FIN seems quite reasonable if it allows
to get rid of this socket, free memory, and not block the process from
eventually doing other useful work.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 net/ipv4/tcp_output.c | 50 +++++++++++++++++++++++++++++---------------------
 1 file changed, 29 insertions(+), 21 deletions(-)

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 59d4f17b1992..47b27e9dd8cc 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2583,7 +2583,8 @@ begin_fwd:
 
 /* We allow to exceed memory limits for FIN packets to expedite
  * connection tear down and (memory) recovery.
- * Otherwise tcp_send_fin() could loop forever.
+ * Otherwise tcp_send_fin() could be tempted to either delay FIN
+ * or even be forced to close flow without any FIN.
  */
 static void sk_forced_wmem_schedule(struct sock *sk, int size)
 {
@@ -2596,33 +2597,40 @@ static void sk_forced_wmem_schedule(struct sock *sk, int size)
 	sk_memory_allocated_add(sk, amt, &status);
 }
 
-/* Send a fin.  The caller locks the socket for us.  This cannot be
- * allowed to fail queueing a FIN frame under any circumstances.
+/* Send a FIN. The caller locks the socket for us.
+ * We should try to send a FIN packet really hard, but eventually give up.
  */
 void tcp_send_fin(struct sock *sk)
 {
+	struct sk_buff *skb, *tskb = tcp_write_queue_tail(sk);
 	struct tcp_sock *tp = tcp_sk(sk);
-	struct sk_buff *skb = tcp_write_queue_tail(sk);
-	int mss_now;
 
-	/* Optimization, tack on the FIN if we have a queue of
-	 * unsent frames.  But be careful about outgoing SACKS
-	 * and IP options.
+	/* Optimization, tack on the FIN if we have one skb in write queue and
+	 * this skb was not yet sent, or we are under memory pressure.
+	 * Note: in the latter case, FIN packet will be sent after a timeout,
+	 * as TCP stack thinks it has already been transmitted.
 	 */
-	mss_now = tcp_current_mss(sk);
-
-	if (tcp_send_head(sk) != NULL) {
-		TCP_SKB_CB(skb)->tcp_flags |= TCPHDR_FIN;
-		TCP_SKB_CB(skb)->end_seq++;
+	if (tskb && (tcp_send_head(sk) || sk_under_memory_pressure(sk))) {
+coalesce:
+		TCP_SKB_CB(tskb)->tcp_flags |= TCPHDR_FIN;
+		TCP_SKB_CB(tskb)->end_seq++;
 		tp->write_seq++;
+		if (!tcp_send_head(sk)) {
+			/* This means tskb was already sent.
+			 * Pretend we included the FIN on previous transmit.
+			 * We need to set tp->snd_nxt to the value it would have
+			 * if FIN had been sent. This is because retransmit path
+			 * does not change tp->snd_nxt.
+			 */
+			tp->snd_nxt++;
+			return;
+		}
 	} else {
-		/* Socket is locked, keep trying until memory is available. */
-		for (;;) {
-			skb = alloc_skb_fclone(MAX_TCP_HEADER,
-					       sk->sk_allocation);
-			if (skb)
-				break;
-			yield();
+		skb = alloc_skb_fclone(MAX_TCP_HEADER, sk->sk_allocation);
+		if (unlikely(!skb)) {
+			if (tskb)
+				goto coalesce;
+			return;
 		}
 		skb_reserve(skb, MAX_TCP_HEADER);
 		sk_forced_wmem_schedule(sk, skb->truesize);
@@ -2631,7 +2639,7 @@ void tcp_send_fin(struct sock *sk)
 				     TCPHDR_ACK | TCPHDR_FIN);
 		tcp_queue_skb(sk, skb);
 	}
-	__tcp_push_pending_frames(sk, mss_now, TCP_NAGLE_OFF);
+	__tcp_push_pending_frames(sk, tcp_current_mss(sk), TCP_NAGLE_OFF);
 }
 
 /* We get here when a process closes a file descriptor (either due to
-- 
2.3.7

[PATCH 3.12 004/142] net: do not deplete pfmemalloc reserve

[Jiri Slaby]

From: Eric Dumazet <edumazet@google.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

[ Upstream commit 79930f5892e134c6da1254389577fffb8bd72c66 ]

build_skb() should look at the page pfmemalloc status.
If set, this means page allocator allocated this page in the
expectation it would help to free other pages. Networking
stack can do that only if skb->pfmemalloc is also set.

Also, we must refrain using high order pages from the pfmemalloc
reserve, so __page_frag_refill() must also use __GFP_NOMEMALLOC for
them. Under memory pressure, using order-0 pages is probably the best
strategy.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 net/core/skbuff.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 17313d17a923..d354bb277539 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -308,7 +308,11 @@ struct sk_buff *build_skb(void *data, unsigned int frag_size)
 
 	memset(skb, 0, offsetof(struct sk_buff, tail));
 	skb->truesize = SKB_TRUESIZE(size);
-	skb->head_frag = frag_size != 0;
+	if (frag_size) {
+		skb->head_frag = 1;
+		if (virt_to_head_page(data)->pfmemalloc)
+			skb->pfmemalloc = 1;
+	}
 	atomic_set(&skb->users, 1);
 	skb->head = data;
 	skb->data = data;
@@ -351,7 +355,8 @@ refill:
 			gfp_t gfp = gfp_mask;
 
 			if (order)
-				gfp |= __GFP_COMP | __GFP_NOWARN;
+				gfp |= __GFP_COMP | __GFP_NOWARN |
+				       __GFP_NOMEMALLOC;
 			nc->frag.page = alloc_pages(gfp, order);
 			if (likely(nc->frag.page))
 				break;
-- 
2.3.7

[PATCH 3.12 005/142] net: fix crash in build_skb()

[Jiri Slaby]

From: Eric Dumazet <edumazet@google.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

[ Upstream commit 2ea2f62c8bda242433809c7f4e9eae1c52c40bbe ]

When I added pfmemalloc support in build_skb(), I forgot netlink
was using build_skb() with a vmalloc() area.

In this patch I introduce __build_skb() for netlink use,
and build_skb() is a wrapper handling both skb->head_frag and
skb->pfmemalloc

This means netlink no longer has to hack skb->head_frag

[ 1567.700067] kernel BUG at arch/x86/mm/physaddr.c:26!
[ 1567.700067] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[ 1567.700067] Dumping ftrace buffer:
[ 1567.700067]    (ftrace buffer empty)
[ 1567.700067] Modules linked in:
[ 1567.700067] CPU: 9 PID: 16186 Comm: trinity-c182 Not tainted 4.0.0-next-20150424-sasha-00037-g4796e21 #2167
[ 1567.700067] task: ffff880127efb000 ti: ffff880246770000 task.ti: ffff880246770000
[ 1567.700067] RIP: __phys_addr (arch/x86/mm/physaddr.c:26 (discriminator 3))
[ 1567.700067] RSP: 0018:ffff8802467779d8  EFLAGS: 00010202
[ 1567.700067] RAX: 000041000ed8e000 RBX: ffffc9008ed8e000 RCX: 000000000000002c
[ 1567.700067] RDX: 0000000000000004 RSI: 0000000000000000 RDI: ffffffffb3fd6049
[ 1567.700067] RBP: ffff8802467779f8 R08: 0000000000000019 R09: ffff8801d0168000
[ 1567.700067] R10: ffff8801d01680c7 R11: ffffed003a02d019 R12: ffffc9000ed8e000
[ 1567.700067] R13: 0000000000000f40 R14: 0000000000001180 R15: ffffc9000ed8e000
[ 1567.700067] FS:  00007f2a7da3f700(0000) GS:ffff8801d1000000(0000) knlGS:0000000000000000
[ 1567.700067] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1567.700067] CR2: 0000000000738308 CR3: 000000022e329000 CR4: 00000000000007e0
[ 1567.700067] Stack:
[ 1567.700067]  ffffc9000ed8e000 ffff8801d0168000 ffffc9000ed8e000 ffff8801d0168000
[ 1567.700067]  ffff880246777a28 ffffffffad7c0a21 0000000000001080 ffff880246777c08
[ 1567.700067]  ffff88060d302e68 ffff880246777b58 ffff880246777b88 ffffffffad9a6821
[ 1567.700067] Call Trace:
[ 1567.700067] build_skb (include/linux/mm.h:508 net/core/skbuff.c:316)
[ 1567.700067] netlink_sendmsg (net/netlink/af_netlink.c:1633 net/netlink/af_netlink.c:2329)
[ 1567.774369] ? sched_clock_cpu (kernel/sched/clock.c:311)
[ 1567.774369] ? netlink_unicast (net/netlink/af_netlink.c:2273)
[ 1567.774369] ? netlink_unicast (net/netlink/af_netlink.c:2273)
[ 1567.774369] sock_sendmsg (net/socket.c:614 net/socket.c:623)
[ 1567.774369] sock_write_iter (net/socket.c:823)
[ 1567.774369] ? sock_sendmsg (net/socket.c:806)
[ 1567.774369] __vfs_write (fs/read_write.c:479 fs/read_write.c:491)
[ 1567.774369] ? get_lock_stats (kernel/locking/lockdep.c:249)
[ 1567.774369] ? default_llseek (fs/read_write.c:487)
[ 1567.774369] ? vtime_account_user (kernel/sched/cputime.c:701)
[ 1567.774369] ? rw_verify_area (fs/read_write.c:406 (discriminator 4))
[ 1567.774369] vfs_write (fs/read_write.c:539)
[ 1567.774369] SyS_write (fs/read_write.c:586 fs/read_write.c:577)
[ 1567.774369] ? SyS_read (fs/read_write.c:577)
[ 1567.774369] ? __this_cpu_preempt_check (lib/smp_processor_id.c:63)
[ 1567.774369] ? trace_hardirqs_on_caller (kernel/locking/lockdep.c:2594 kernel/locking/lockdep.c:2636)
[ 1567.774369] ? trace_hardirqs_on_thunk (arch/x86/lib/thunk_64.S:42)
[ 1567.774369] system_call_fastpath (arch/x86/kernel/entry_64.S:261)

Fixes: 79930f5892e ("net: do not deplete pfmemalloc reserve")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 include/linux/skbuff.h   |  1 +
 net/core/skbuff.c        | 31 ++++++++++++++++++++++---------
 net/netlink/af_netlink.c |  6 ++----
 3 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 2960dab8b6fc..79147dc9630d 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -638,6 +638,7 @@ extern bool skb_try_coalesce(struct sk_buff *to, struct sk_buff *from,
 
 extern struct sk_buff *__alloc_skb(unsigned int size,
 				   gfp_t priority, int flags, int node);
+struct sk_buff *__build_skb(void *data, unsigned int frag_size);
 extern struct sk_buff *build_skb(void *data, unsigned int frag_size);
 static inline struct sk_buff *alloc_skb(unsigned int size,
 					gfp_t priority)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index d354bb277539..fa8448a730a9 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -277,13 +277,14 @@ nodata:
 EXPORT_SYMBOL(__alloc_skb);
 
 /**
- * build_skb - build a network buffer
+ * __build_skb - build a network buffer
  * @data: data buffer provided by caller
- * @frag_size: size of fragment, or 0 if head was kmalloced
+ * @frag_size: size of data, or 0 if head was kmalloced
  *
  * Allocate a new &sk_buff. Caller provides space holding head and
  * skb_shared_info. @data must have been allocated by kmalloc() only if
- * @frag_size is 0, otherwise data should come from the page allocator.
+ * @frag_size is 0, otherwise data should come from the page allocator
+ *  or vmalloc()
  * The return is the new skb buffer.
  * On a failure the return is %NULL, and @data is not freed.
  * Notes :
@@ -294,7 +295,7 @@ EXPORT_SYMBOL(__alloc_skb);
  *  before giving packet to stack.
  *  RX rings only contains data buffers, not full skbs.
  */
-struct sk_buff *build_skb(void *data, unsigned int frag_size)
+struct sk_buff *__build_skb(void *data, unsigned int frag_size)
 {
 	struct skb_shared_info *shinfo;
 	struct sk_buff *skb;
@@ -308,11 +309,6 @@ struct sk_buff *build_skb(void *data, unsigned int frag_size)
 
 	memset(skb, 0, offsetof(struct sk_buff, tail));
 	skb->truesize = SKB_TRUESIZE(size);
-	if (frag_size) {
-		skb->head_frag = 1;
-		if (virt_to_head_page(data)->pfmemalloc)
-			skb->pfmemalloc = 1;
-	}
 	atomic_set(&skb->users, 1);
 	skb->head = data;
 	skb->data = data;
@@ -329,6 +325,23 @@ struct sk_buff *build_skb(void *data, unsigned int frag_size)
 
 	return skb;
 }
+
+/* build_skb() is wrapper over __build_skb(), that specifically
+ * takes care of skb->head and skb->pfmemalloc
+ * This means that if @frag_size is not zero, then @data must be backed
+ * by a page fragment, not kmalloc() or vmalloc()
+ */
+struct sk_buff *build_skb(void *data, unsigned int frag_size)
+{
+	struct sk_buff *skb = __build_skb(data, frag_size);
+
+	if (skb && frag_size) {
+		skb->head_frag = 1;
+		if (virt_to_head_page(data)->pfmemalloc)
+			skb->pfmemalloc = 1;
+	}
+	return skb;
+}
 EXPORT_SYMBOL(build_skb);
 
 struct netdev_alloc_cache {
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 00590135dc30..5a75a1eb3ae7 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1616,13 +1616,11 @@ static struct sk_buff *netlink_alloc_large_skb(unsigned int size,
 	if (data == NULL)
 		return NULL;
 
-	skb = build_skb(data, size);
+	skb = __build_skb(data, size);
 	if (skb == NULL)
 		vfree(data);
-	else {
-		skb->head_frag = 0;
+	else
 		skb->destructor = netlink_skb_destructor;
-	}
 
 	return skb;
 }
-- 
2.3.7

[PATCH 3.12 006/142] Btrfs: fix log tree corruption when fs mounted with -o discard

[Jiri Slaby]

From: Filipe Manana <fdmanana@suse.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit dcc82f4783ad91d4ab654f89f37ae9291cdc846a upstream.

While committing a transaction we free the log roots before we write the
new super block. Freeing the log roots implies marking the disk location
of every node/leaf (metadata extent) as pinned before the new super block
is written. This is to prevent the disk location of log metadata extents
from being reused before the new super block is written, otherwise we
would have a corrupted log tree if before the new super block is written
a crash/reboot happens and the location of any log tree metadata extent
ended up being reused and rewritten.

Even though we pinned the log tree's metadata extents, we were issuing a
discard against them if the fs was mounted with the -o discard option,
resulting in corruption of the log tree if a crash/reboot happened before
writing the new super block - the next time the fs was mounted, during
the log replay process we would find nodes/leafs of the log btree with
a content full of zeroes, causing the process to fail and require the
use of the tool btrfs-zero-log to wipeout the log tree (and all data
previously fsynced becoming lost forever).

Fix this by not doing a discard when pinning an extent. The discard will
be done later when it's safe (after the new super block is committed) at
extent-tree.c:btrfs_finish_extent_commit().

Fixes: e688b7252f78 (Btrfs: fix extent pinning bugs in the tree log)
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/btrfs/extent-tree.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index b1c6e490379c..b3afdde7108c 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -6613,12 +6613,11 @@ static int __btrfs_free_reserved_extent(struct btrfs_root *root,
 		return -ENOSPC;
 	}
 
-	if (btrfs_test_opt(root, DISCARD))
-		ret = btrfs_discard_extent(root, start, len, NULL);
-
 	if (pin)
 		pin_down_extent(root, cache, start, len, 1);
 	else {
+		if (btrfs_test_opt(root, DISCARD))
+			ret = btrfs_discard_extent(root, start, len, NULL);
 		btrfs_add_free_space(cache, start, len);
 		btrfs_update_reserved_bytes(cache, len, RESERVE_FREE);
 	}
-- 
2.3.7

[PATCH 3.12 007/142] btrfs: don't accept bare namespace as a valid xattr

[Jiri Slaby]

From: David Sterba <dsterba@suse.cz>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 3c3b04d10ff1811a27f86684ccd2f5ba6983211d upstream.

Due to insufficient check in btrfs_is_valid_xattr, this unexpectedly
works:

 $ touch file
 $ setfattr -n user. -v 1 file
 $ getfattr -d file
user.="1"

ie. the missing attribute name after the namespace.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=94291
Reported-by: William Douglas <william.douglas@intel.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/btrfs/xattr.c | 50 +++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 37 insertions(+), 13 deletions(-)

diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 05740b9789e4..7e21b2b3fcf2 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -322,21 +322,40 @@ const struct xattr_handler *btrfs_xattr_handlers[] = {
 /*
  * Check if the attribute is in a supported namespace.
  *
- * This applied after the check for the synthetic attributes in the system
+ * This is applied after the check for the synthetic attributes in the system
  * namespace.
  */
-static bool btrfs_is_valid_xattr(const char *name)
+static int btrfs_is_valid_xattr(const char *name)
 {
-	return !strncmp(name, XATTR_SECURITY_PREFIX,
-			XATTR_SECURITY_PREFIX_LEN) ||
-	       !strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) ||
-	       !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) ||
-	       !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
+	int len = strlen(name);
+	int prefixlen = 0;
+
+	if (!strncmp(name, XATTR_SECURITY_PREFIX,
+			XATTR_SECURITY_PREFIX_LEN))
+		prefixlen = XATTR_SECURITY_PREFIX_LEN;
+	else if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
+		prefixlen = XATTR_SYSTEM_PREFIX_LEN;
+	else if (!strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN))
+		prefixlen = XATTR_TRUSTED_PREFIX_LEN;
+	else if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
+		prefixlen = XATTR_USER_PREFIX_LEN;
+	else
+		return -EOPNOTSUPP;
+
+	/*
+	 * The name cannot consist of just prefix
+	 */
+	if (len <= prefixlen)
+		return -EINVAL;
+
+	return 0;
 }
 
 ssize_t btrfs_getxattr(struct dentry *dentry, const char *name,
 		       void *buffer, size_t size)
 {
+	int ret;
+
 	/*
 	 * If this is a request for a synthetic attribute in the system.*
 	 * namespace use the generic infrastructure to resolve a handler
@@ -345,8 +364,9 @@ ssize_t btrfs_getxattr(struct dentry *dentry, const char *name,
 	if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
 		return generic_getxattr(dentry, name, buffer, size);
 
-	if (!btrfs_is_valid_xattr(name))
-		return -EOPNOTSUPP;
+	ret = btrfs_is_valid_xattr(name);
+	if (ret)
+		return ret;
 	return __btrfs_getxattr(dentry->d_inode, name, buffer, size);
 }
 
@@ -354,6 +374,7 @@ int btrfs_setxattr(struct dentry *dentry, const char *name, const void *value,
 		   size_t size, int flags)
 {
 	struct btrfs_root *root = BTRFS_I(dentry->d_inode)->root;
+	int ret;
 
 	/*
 	 * The permission on security.* and system.* is not checked
@@ -370,8 +391,9 @@ int btrfs_setxattr(struct dentry *dentry, const char *name, const void *value,
 	if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
 		return generic_setxattr(dentry, name, value, size, flags);
 
-	if (!btrfs_is_valid_xattr(name))
-		return -EOPNOTSUPP;
+	ret = btrfs_is_valid_xattr(name);
+	if (ret)
+		return ret;
 
 	if (size == 0)
 		value = "";  /* empty EA, do not remove */
@@ -383,6 +405,7 @@ int btrfs_setxattr(struct dentry *dentry, const char *name, const void *value,
 int btrfs_removexattr(struct dentry *dentry, const char *name)
 {
 	struct btrfs_root *root = BTRFS_I(dentry->d_inode)->root;
+	int ret;
 
 	/*
 	 * The permission on security.* and system.* is not checked
@@ -399,8 +422,9 @@ int btrfs_removexattr(struct dentry *dentry, const char *name)
 	if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
 		return generic_removexattr(dentry, name);
 
-	if (!btrfs_is_valid_xattr(name))
-		return -EOPNOTSUPP;
+	ret = btrfs_is_valid_xattr(name);
+	if (ret)
+		return ret;
 
 	return __btrfs_setxattr(NULL, dentry->d_inode, name, NULL, 0,
 				XATTR_REPLACE);
-- 
2.3.7

[PATCH 3.12 008/142] Btrfs: fix inode eviction infinite loop after cloning into it

[Jiri Slaby]

From: Filipe Manana <fdmanana@suse.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit ccccf3d67294714af2d72a6fd6fd7d73b01c9329 upstream.

If we attempt to clone a 0 length region into a file we can end up
inserting a range in the inode's extent_io tree with a start offset
that is greater then the end offset, which triggers immediately the
following warning:

[ 3914.619057] WARNING: CPU: 17 PID: 4199 at fs/btrfs/extent_io.c:435 insert_state+0x4b/0x10b [btrfs]()
[ 3914.620886] BTRFS: end < start 4095 4096
(...)
[ 3914.638093] Call Trace:
[ 3914.638636]  [<ffffffff81425fd9>] dump_stack+0x4c/0x65
[ 3914.639620]  [<ffffffff81045390>] warn_slowpath_common+0xa1/0xbb
[ 3914.640789]  [<ffffffffa03ca44f>] ? insert_state+0x4b/0x10b [btrfs]
[ 3914.642041]  [<ffffffff810453f0>] warn_slowpath_fmt+0x46/0x48
[ 3914.643236]  [<ffffffffa03ca44f>] insert_state+0x4b/0x10b [btrfs]
[ 3914.644441]  [<ffffffffa03ca729>] __set_extent_bit+0x107/0x3f4 [btrfs]
[ 3914.645711]  [<ffffffffa03cb256>] lock_extent_bits+0x65/0x1bf [btrfs]
[ 3914.646914]  [<ffffffff8142b2fb>] ? _raw_spin_unlock+0x28/0x33
[ 3914.648058]  [<ffffffffa03cbac4>] ? test_range_bit+0xcc/0xde [btrfs]
[ 3914.650105]  [<ffffffffa03cb3c3>] lock_extent+0x13/0x15 [btrfs]
[ 3914.651361]  [<ffffffffa03db39e>] lock_extent_range+0x3d/0xcd [btrfs]
[ 3914.652761]  [<ffffffffa03de1fe>] btrfs_ioctl_clone+0x278/0x388 [btrfs]
[ 3914.654128]  [<ffffffff811226dd>] ? might_fault+0x58/0xb5
[ 3914.655320]  [<ffffffffa03e0909>] btrfs_ioctl+0xb51/0x2195 [btrfs]
(...)
[ 3914.669271] ---[ end trace 14843d3e2e622fc1 ]---

This later makes the inode eviction handler enter an infinite loop that
keeps dumping the following warning over and over:

[ 3915.117629] WARNING: CPU: 22 PID: 4228 at fs/btrfs/extent_io.c:435 insert_state+0x4b/0x10b [btrfs]()
[ 3915.119913] BTRFS: end < start 4095 4096
(...)
[ 3915.137394] Call Trace:
[ 3915.137913]  [<ffffffff81425fd9>] dump_stack+0x4c/0x65
[ 3915.139154]  [<ffffffff81045390>] warn_slowpath_common+0xa1/0xbb
[ 3915.140316]  [<ffffffffa03ca44f>] ? insert_state+0x4b/0x10b [btrfs]
[ 3915.141505]  [<ffffffff810453f0>] warn_slowpath_fmt+0x46/0x48
[ 3915.142709]  [<ffffffffa03ca44f>] insert_state+0x4b/0x10b [btrfs]
[ 3915.143849]  [<ffffffffa03ca729>] __set_extent_bit+0x107/0x3f4 [btrfs]
[ 3915.145120]  [<ffffffffa038c1e3>] ? btrfs_kill_super+0x17/0x23 [btrfs]
[ 3915.146352]  [<ffffffff811548f6>] ? deactivate_locked_super+0x3b/0x50
[ 3915.147565]  [<ffffffffa03cb256>] lock_extent_bits+0x65/0x1bf [btrfs]
[ 3915.148785]  [<ffffffff8142b7e2>] ? _raw_write_unlock+0x28/0x33
[ 3915.149931]  [<ffffffffa03bc325>] btrfs_evict_inode+0x196/0x482 [btrfs]
[ 3915.151154]  [<ffffffff81168904>] evict+0xa0/0x148
[ 3915.152094]  [<ffffffff811689e5>] dispose_list+0x39/0x43
[ 3915.153081]  [<ffffffff81169564>] evict_inodes+0xdc/0xeb
[ 3915.154062]  [<ffffffff81154418>] generic_shutdown_super+0x49/0xef
[ 3915.155193]  [<ffffffff811546d1>] kill_anon_super+0x13/0x1e
[ 3915.156274]  [<ffffffffa038c1e3>] btrfs_kill_super+0x17/0x23 [btrfs]
(...)
[ 3915.167404] ---[ end trace 14843d3e2e622fc2 ]---

So just bail out of the clone ioctl if the length of the region to clone
is zero, without locking any extent range, in order to prevent this issue
(same behaviour as a pwrite with a 0 length for example).

This is trivial to reproduce. For example, the steps for the test I just
made for fstests:

  mkfs.btrfs -f SCRATCH_DEV
  mount SCRATCH_DEV $SCRATCH_MNT

  touch $SCRATCH_MNT/foo
  touch $SCRATCH_MNT/bar

  $CLONER_PROG -s 0 -d 4096 -l 0 $SCRATCH_MNT/foo $SCRATCH_MNT/bar
  umount $SCRATCH_MNT

A test case for fstests follows soon.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/btrfs/ioctl.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 50a06debb1bd..3cf8a7b671cb 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3211,6 +3211,11 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
 	if (off + len == src->i_size)
 		len = ALIGN(src->i_size, bs) - off;
 
+	if (len == 0) {
+		ret = 0;
+		goto out_unlock;
+	}
+
 	/* verify the end result is block aligned */
 	if (!IS_ALIGNED(off, bs) || !IS_ALIGNED(off + len, bs) ||
 	    !IS_ALIGNED(destoff, bs))
-- 
2.3.7

[PATCH 3.12 009/142] Btrfs: fix inode eviction infinite loop after extent_same ioctl

[Jiri Slaby]

From: Filipe Manana <fdmanana@suse.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 113e8283869b9855c8b999796aadd506bbac155f upstream.

If we pass a length of 0 to the extent_same ioctl, we end up locking an
extent range with a start offset greater then its end offset (if the
destination file's offset is greater than zero). This results in a warning
from extent_io.c:insert_state through the following call chain:

  btrfs_extent_same()
    btrfs_double_lock()
      lock_extent_range()
        lock_extent(inode->io_tree, offset, offset + len - 1)
          lock_extent_bits()
            __set_extent_bit()
              insert_state()
                --> WARN_ON(end < start)

This leads to an infinite loop when evicting the inode. This is the same
problem that my previous patch titled
"Btrfs: fix inode eviction infinite loop after cloning into it" addressed
but for the extent_same ioctl instead of the clone ioctl.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/btrfs/ioctl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 3cf8a7b671cb..d43cd15c3097 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2671,6 +2671,9 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 len,
 	if (src == dst)
 		return -EINVAL;
 
+	if (len == 0)
+		return 0;
+
 	btrfs_double_lock(src, loff, dst, dst_loff, len);
 
 	ret = extent_same_check_offsets(src, loff, len);
-- 
2.3.7

[PATCH 3.12 010/142] sched/idle/x86: Restore mwait_idle() to fix boot hangs, to improve power savings and to improve performance

[Jiri Slaby]

From: Len Brown <len.brown@intel.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit b253149b843f89cd300cbdbea27ce1f847506f99 upstream.

In Linux-3.9 we removed the mwait_idle() loop:

  69fb3676df33 ("x86 idle: remove mwait_idle() and "idle=mwait" cmdline param")

The reasoning was that modern machines should be sufficiently
happy during the boot process using the default_idle() HALT
loop, until cpuidle loads and either acpi_idle or intel_idle
invoke the newer MWAIT-with-hints idle loop.

But two machines reported problems:

 1. Certain Core2-era machines support MWAIT-C1 and HALT only.
    MWAIT-C1 is preferred for optimal power and performance.
    But if they support just C1, cpuidle never loads and
    so they use the boot-time default idle loop forever.

 2. Some laptops will boot-hang if HALT is used,
    but will boot successfully if MWAIT is used.
    This appears to be a hidden assumption in BIOS SMI,
    that is presumably valid on the proprietary OS
    where the BIOS was validated.

       https://bugzilla.kernel.org/show_bug.cgi?id=60770

So here we effectively revert the patch above, restoring
the mwait_idle() loop.  However, we don't bother restoring
the idle=mwait cmdline parameter, since it appears to add
no value.

Maintainer notes:

  For 3.9, simply revert 69fb3676df
  for 3.10, patch -F3 applies, fuzz needed due to __cpuinit use in
  context For 3.11, 3.12, 3.13, this patch applies cleanly

Tested-by: Mike Galbraith <bitbucket@online.de>
Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Mike Galbraith <bitbucket@online.de>
Cc: <stable@vger.kernel.org> # 3.9+
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ian Malone <ibmalone@gmail.com>
Cc: Josh Boyer <jwboyer@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/345254a551eb5a6a866e048d7ab570fd2193aca4.1389763084.git.len.brown@intel.com
[ Ported to recent kernels. ]
[ Mike: 3.10 backport ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/x86/kernel/process.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 3fb8d95ab8b5..c5db2a43e730 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -398,6 +398,52 @@ static void amd_e400_idle(void)
 		default_idle();
 }
 
+/*
+ * Intel Core2 and older machines prefer MWAIT over HALT for C1.
+ * We can't rely on cpuidle installing MWAIT, because it will not load
+ * on systems that support only C1 -- so the boot default must be MWAIT.
+ *
+ * Some AMD machines are the opposite, they depend on using HALT.
+ *
+ * So for default C1, which is used during boot until cpuidle loads,
+ * use MWAIT-C1 on Intel HW that has it, else use HALT.
+ */
+static int prefer_mwait_c1_over_halt(const struct cpuinfo_x86 *c)
+{
+	if (c->x86_vendor != X86_VENDOR_INTEL)
+		return 0;
+
+	if (!cpu_has(c, X86_FEATURE_MWAIT))
+		return 0;
+
+	return 1;
+}
+
+/*
+ * MONITOR/MWAIT with no hints, used for default default C1 state.
+ * This invokes MWAIT with interrutps enabled and no flags,
+ * which is backwards compatible with the original MWAIT implementation.
+ */
+
+static void mwait_idle(void)
+{
+	if (!current_set_polling_and_test()) {
+		if (static_cpu_has(X86_FEATURE_CLFLUSH_MONITOR)) {
+			mb();
+			clflush((void *)&current_thread_info()->flags);
+			mb();
+		}
+
+		__monitor((void *)&current_thread_info()->flags, 0, 0);
+		if (!need_resched())
+			__sti_mwait(0, 0);
+		else
+			local_irq_enable();
+	} else
+		local_irq_enable();
+	__current_clr_polling();
+}
+
 void select_idle_routine(const struct cpuinfo_x86 *c)
 {
 #ifdef CONFIG_SMP
@@ -411,6 +457,9 @@ void select_idle_routine(const struct cpuinfo_x86 *c)
 		/* E400: APIC timer interrupt does not wake up CPU from C1e */
 		pr_info("using AMD E400 aware idle routine\n");
 		x86_idle = amd_e400_idle;
+	} else if (prefer_mwait_c1_over_halt(c)) {
+		pr_info("using mwait in idle threads\n");
+		x86_idle = mwait_idle;
 	} else
 		x86_idle = default_idle;
 }
-- 
2.3.7

[PATCH 3.12 011/142] mm/hugetlb: use pmd_page() in follow_huge_pmd()

[Jiri Slaby]

From: Gerald Schaefer <gerald.schaefer@de.ibm.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 97534127012f0e396eddea4691f4c9b170aed74b upstream.

Commit 61f77eda9bbf ("mm/hugetlb: reduce arch dependent code around
follow_huge_*") broke follow_huge_pmd() on s390, where pmd and pte
layout differ and using pte_page() on a huge pmd will return wrong
results.  Using pmd_page() instead fixes this.

All architectures that were touched by that commit have pmd_page()
defined, so this should not break anything on other architectures.

Fixes: 61f77eda "mm/hugetlb: reduce arch dependent code around follow_huge_*"
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Michal Hocko <mhocko@suse.cz>, Andrea Arcangeli <aarcange@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 mm/hugetlb.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 424ee30fcd0d..c91c347bb3ea 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3494,8 +3494,7 @@ retry:
 	if (!pmd_huge(*pmd))
 		goto out;
 	if (pmd_present(*pmd)) {
-		page = pte_page(*(pte_t *)pmd) +
-			((address & ~PMD_MASK) >> PAGE_SHIFT);
+		page = pmd_page(*pmd) + ((address & ~PMD_MASK) >> PAGE_SHIFT);
 		if (flags & FOLL_GET)
 			get_page(page);
 	} else {
-- 
2.3.7

[PATCH 3.12 012/142] drivers: parport: Kconfig: exclude arm64 for PARPORT_PC

[Jiri Slaby]

From: Guenter Roeck <linux@roeck-us.net>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

Fix build problem seen with arm64:allmodconfig.

drivers/parport/parport_pc.c:67:25: fatal error: asm/parport.h: No such file or
directory

arm64 does not support PARPORT_PC.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/parport/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/parport/Kconfig b/drivers/parport/Kconfig
index 70694ce38be2..46d2de24bf3e 100644
--- a/drivers/parport/Kconfig
+++ b/drivers/parport/Kconfig
@@ -37,7 +37,7 @@ config PARPORT_PC
 	tristate "PC-style hardware"
 	depends on (!SPARC64 || PCI) && !SPARC32 && !M32R && !FRV && !S390 && \
 		(!M68K || ISA) && !MN10300 && !AVR32 && !BLACKFIN && \
-		!XTENSA && !CRIS && !H8300
+		!XTENSA && !CRIS && !H8300 && !ARM64
 
 	---help---
 	  You should say Y here if you have a PC-style parallel port. All
-- 
2.3.7

[PATCH 3.12 013/142] usb: gadget: composite: enable BESL support

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit a6615937bcd9234e6d6bb817c3701fce44d0a84d upstream.

According to USB 2.0 ECN Errata for Link Power
Management (USB2-LPM-Errata-final.pdf), BESL
must be enabled if LPM is enabled.

This helps with USB30CV TD 9.21 LPM L1
Suspend Resume Test.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Du, Changbin <changbin.du@intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/gadget/composite.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 7c0adb9812aa..a0b5a13b52b0 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -528,7 +528,7 @@ static int bos_desc(struct usb_composite_dev *cdev)
 	usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE;
 	usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
 	usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT;
-	usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT);
+	usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT | USB_BESL_SUPPORT);
 
 	/*
 	 * The Superspeed USB Capability descriptor shall be implemented by all
-- 
2.3.7

[PATCH 3.12 014/142] nosave: consolidate __nosave_{begin,end} in <asm/sections.h>

[Jiri Slaby]

From: Geert Uytterhoeven <geert@linux-m68k.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 7f8998c7aef3ac9c5f3f2943e083dfa6302e90d0 upstream.

The different architectures used their own (and different) declarations:

    extern __visible const void __nosave_begin, __nosave_end;
    extern const void __nosave_begin, __nosave_end;
    extern long __nosave_begin, __nosave_end;

Consolidate them using the first variant in <asm/sections.h>.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
[js -- port to 3.12: arm does not have hibernation yet]
---
 arch/mips/include/asm/suspend.h   | 7 -------
 arch/mips/power/cpu.c             | 2 +-
 arch/powerpc/kernel/suspend.c     | 4 +---
 arch/s390/kernel/suspend.c        | 6 +-----
 arch/sh/include/asm/sections.h    | 1 -
 arch/sparc/power/hibernate.c      | 4 +---
 arch/unicore32/include/mach/pm.h  | 3 ---
 arch/unicore32/kernel/hibernate.c | 1 +
 arch/x86/power/hibernate_32.c     | 4 +---
 arch/x86/power/hibernate_64.c     | 4 +---
 include/asm-generic/sections.h    | 4 ++++
 11 files changed, 11 insertions(+), 29 deletions(-)
 delete mode 100644 arch/mips/include/asm/suspend.h

diff --git a/arch/mips/include/asm/suspend.h b/arch/mips/include/asm/suspend.h
deleted file mode 100644
index 3adac3b53d19..000000000000
--- a/arch/mips/include/asm/suspend.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef __ASM_SUSPEND_H
-#define __ASM_SUSPEND_H
-
-/* References to section boundaries */
-extern const void __nosave_begin, __nosave_end;
-
-#endif /* __ASM_SUSPEND_H */
diff --git a/arch/mips/power/cpu.c b/arch/mips/power/cpu.c
index 521e5963df05..2129e67723ff 100644
--- a/arch/mips/power/cpu.c
+++ b/arch/mips/power/cpu.c
@@ -7,7 +7,7 @@
  * Author: Hu Hongbing <huhb@lemote.com>
  *	   Wu Zhangjin <wuzhangjin@gmail.com>
  */
-#include <asm/suspend.h>
+#include <asm/sections.h>
 #include <asm/fpu.h>
 #include <asm/dsp.h>
 
diff --git a/arch/powerpc/kernel/suspend.c b/arch/powerpc/kernel/suspend.c
index 0167d53da30c..a531154cc0f3 100644
--- a/arch/powerpc/kernel/suspend.c
+++ b/arch/powerpc/kernel/suspend.c
@@ -9,9 +9,7 @@
 
 #include <linux/mm.h>
 #include <asm/page.h>
-
-/* References to section boundaries */
-extern const void __nosave_begin, __nosave_end;
+#include <asm/sections.h>
 
 /*
  *	pfn_is_nosave - check if given pfn is in the 'nosave' section
diff --git a/arch/s390/kernel/suspend.c b/arch/s390/kernel/suspend.c
index a7a7537ce1e7..1c4c5accd220 100644
--- a/arch/s390/kernel/suspend.c
+++ b/arch/s390/kernel/suspend.c
@@ -13,14 +13,10 @@
 #include <asm/ipl.h>
 #include <asm/cio.h>
 #include <asm/pci.h>
+#include <asm/sections.h>
 #include "entry.h"
 
 /*
- * References to section boundaries
- */
-extern const void __nosave_begin, __nosave_end;
-
-/*
  * The restore of the saved pages in an hibernation image will set
  * the change and referenced bits in the storage key for each page.
  * Overindication of the referenced bits after an hibernation cycle
diff --git a/arch/sh/include/asm/sections.h b/arch/sh/include/asm/sections.h
index 1b6199740e98..7a99e6af6372 100644
--- a/arch/sh/include/asm/sections.h
+++ b/arch/sh/include/asm/sections.h
@@ -3,7 +3,6 @@
 
 #include <asm-generic/sections.h>
 
-extern long __nosave_begin, __nosave_end;
 extern long __machvec_start, __machvec_end;
 extern char __uncached_start, __uncached_end;
 extern char __start_eh_frame[], __stop_eh_frame[];
diff --git a/arch/sparc/power/hibernate.c b/arch/sparc/power/hibernate.c
index 42b0b8ce699a..17bd2e167e07 100644
--- a/arch/sparc/power/hibernate.c
+++ b/arch/sparc/power/hibernate.c
@@ -9,11 +9,9 @@
 #include <asm/hibernate.h>
 #include <asm/visasm.h>
 #include <asm/page.h>
+#include <asm/sections.h>
 #include <asm/tlb.h>
 
-/* References to section boundaries */
-extern const void __nosave_begin, __nosave_end;
-
 struct saved_context saved_context;
 
 /*
diff --git a/arch/unicore32/include/mach/pm.h b/arch/unicore32/include/mach/pm.h
index 4dcd34ae194c..77b522694e74 100644
--- a/arch/unicore32/include/mach/pm.h
+++ b/arch/unicore32/include/mach/pm.h
@@ -36,8 +36,5 @@ extern int puv3_pm_enter(suspend_state_t state);
 /* Defined in hibernate_asm.S */
 extern int restore_image(pgd_t *resume_pg_dir, struct pbe *restore_pblist);
 
-/* References to section boundaries */
-extern const void __nosave_begin, __nosave_end;
-
 extern struct pbe *restore_pblist;
 #endif
diff --git a/arch/unicore32/kernel/hibernate.c b/arch/unicore32/kernel/hibernate.c
index d75ef8b6cb56..9969ec374abb 100644
--- a/arch/unicore32/kernel/hibernate.c
+++ b/arch/unicore32/kernel/hibernate.c
@@ -18,6 +18,7 @@
 #include <asm/page.h>
 #include <asm/pgtable.h>
 #include <asm/pgalloc.h>
+#include <asm/sections.h>
 #include <asm/suspend.h>
 
 #include "mach/pm.h"
diff --git a/arch/x86/power/hibernate_32.c b/arch/x86/power/hibernate_32.c
index 7d28c885d238..291226b952a9 100644
--- a/arch/x86/power/hibernate_32.c
+++ b/arch/x86/power/hibernate_32.c
@@ -13,13 +13,11 @@
 #include <asm/page.h>
 #include <asm/pgtable.h>
 #include <asm/mmzone.h>
+#include <asm/sections.h>
 
 /* Defined in hibernate_asm_32.S */
 extern int restore_image(void);
 
-/* References to section boundaries */
-extern const void __nosave_begin, __nosave_end;
-
 /* Pointer to the temporary resume page tables */
 pgd_t *resume_pg_dir;
 
diff --git a/arch/x86/power/hibernate_64.c b/arch/x86/power/hibernate_64.c
index 304fca20d96e..2276238fde6f 100644
--- a/arch/x86/power/hibernate_64.c
+++ b/arch/x86/power/hibernate_64.c
@@ -17,11 +17,9 @@
 #include <asm/page.h>
 #include <asm/pgtable.h>
 #include <asm/mtrr.h>
+#include <asm/sections.h>
 #include <asm/suspend.h>
 
-/* References to section boundaries */
-extern __visible const void __nosave_begin, __nosave_end;
-
 /* Defined in hibernate_asm_64.S */
 extern asmlinkage int restore_image(void);
 
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index f1a24b5c3b90..b58fd667f87b 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -3,6 +3,8 @@
 
 /* References to section boundaries */
 
+#include <linux/compiler.h>
+
 /*
  * Usage guidelines:
  * _text, _data: architecture specific, don't use them in arch-independent code
@@ -37,6 +39,8 @@ extern char __start_rodata[], __end_rodata[];
 /* Start and end of .ctors section - used for constructor calls. */
 extern char __ctors_start[], __ctors_end[];
 
+extern __visible const void __nosave_begin, __nosave_end;
+
 /* function descriptor handling (if any).  Override
  * in asm/sections.h */
 #ifndef dereference_function_descriptor
-- 
2.3.7

[PATCH 3.12 015/142] KVM: s390: Zero out current VMDB of STSI before including level3 data.

[Jiri Slaby]

From: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit b75f4c9afac2604feb971441116c07a24ecca1ec upstream.

s390 documentation requires words 0 and 10-15 to be reserved and stored as
zeros. As we fill out all other fields, we can memset the full structure.

Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/s390/kvm/priv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index 59200ee275e5..563d7d883ac4 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -355,6 +355,7 @@ static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
 	for (n = mem->count - 1; n > 0 ; n--)
 		memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
 
+	memset(&mem->vm[0], 0, sizeof(mem->vm[0]));
 	mem->vm[0].cpus_total = cpus;
 	mem->vm[0].cpus_configured = cpus;
 	mem->vm[0].cpus_standby = 0;
-- 
2.3.7

[PATCH 3.12 016/142] s390/hibernate: fix save and restore of kernel text section

[Jiri Slaby]

From: Heiko Carstens <heiko.carstens@de.ibm.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit d74419495633493c9cd3f2bbeb7f3529d0edded6 upstream.

Sebastian reported a crash caused by a jump label mismatch after resume.
This happens because we do not save the kernel text section during suspend
and therefore also do not restore it during resume, but use the kernel image
that restores the old system.

This means that after a suspend/resume cycle we lost all modifications done
to the kernel text section.
The reason for this is the pfn_is_nosave() function, which incorrectly
returns that read-only pages don't need to be saved. This is incorrect since
we mark the kernel text section read-only.
We still need to make sure to not save and restore pages contained within
NSS and DCSS segment.
To fix this add an extra case for the kernel text section and only save
those pages if they are not contained within an NSS segment.

Fixes the following crash (and the above bugs as well):

Jump label code mismatch at netif_receive_skb_internal+0x28/0xd0
Found:    c0 04 00 00 00 00
Expected: c0 f4 00 00 00 11
New:      c0 04 00 00 00 00
Kernel panic - not syncing: Corrupted kernel text
CPU: 0 PID: 9 Comm: migration/0 Not tainted 3.19.0-01975-gb1b096e70f23 #4
Call Trace:
  [<0000000000113972>] show_stack+0x72/0xf0
  [<000000000081f15e>] dump_stack+0x6e/0x90
  [<000000000081c4e8>] panic+0x108/0x2b0
  [<000000000081be64>] jump_label_bug.isra.2+0x104/0x108
  [<0000000000112176>] __jump_label_transform+0x9e/0xd0
  [<00000000001121e6>] __sm_arch_jump_label_transform+0x3e/0x50
  [<00000000001d1136>] multi_cpu_stop+0x12e/0x170
  [<00000000001d1472>] cpu_stopper_thread+0xb2/0x168
  [<000000000015d2ac>] smpboot_thread_fn+0x134/0x1b0
  [<0000000000158baa>] kthread+0x10a/0x110
  [<0000000000824a86>] kernel_thread_starter+0x6/0xc

Reported-and-tested-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/s390/kernel/suspend.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/s390/kernel/suspend.c b/arch/s390/kernel/suspend.c
index 1c4c5accd220..d3236c9e226b 100644
--- a/arch/s390/kernel/suspend.c
+++ b/arch/s390/kernel/suspend.c
@@ -138,6 +138,8 @@ int pfn_is_nosave(unsigned long pfn)
 {
 	unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
 	unsigned long nosave_end_pfn = PFN_DOWN(__pa(&__nosave_end));
+	unsigned long eshared_pfn = PFN_DOWN(__pa(&_eshared)) - 1;
+	unsigned long stext_pfn = PFN_DOWN(__pa(&_stext));
 
 	/* Always save lowcore pages (LC protection might be enabled). */
 	if (pfn <= LC_PAGES)
@@ -145,6 +147,8 @@ int pfn_is_nosave(unsigned long pfn)
 	if (pfn >= nosave_begin_pfn && pfn < nosave_end_pfn)
 		return 1;
 	/* Skip memory holes and read-only pages (NSS, DCSS, ...). */
+	if (pfn >= stext_pfn && pfn <= eshared_pfn)
+		return ipl_info.type == IPL_TYPE_NSS ? 1 : 0;
 	if (tprot(PFN_PHYS(pfn)))
 		return 1;
 	return 0;
-- 
2.3.7

[PATCH 3.12 017/142] KVM: use slowpath for cross page cached accesses

[Jiri Slaby]

From: Radim Krčmář <rkrcmar@redhat.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit ca3f0874723fad81d0c701b63ae3a17a408d5f25 upstream.

kvm_write_guest_cached() does not mark all written pages as dirty and
code comments in kvm_gfn_to_hva_cache_init() talk about NULL memslot
with cross page accesses.  Fix all the easy way.

The check is '<= 1' to have the same result for 'len = 0' cache anywhere
in the page.  (nr_pages_needed is 0 on page boundary.)

Fixes: 8f964525a121 ("KVM: Allow cross page reads and writes from cached translations.")
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Message-Id: <20150408121648.GA3519@potion.brq.redhat.com>
Reviewed-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 virt/kvm/kvm_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index e068d0017fb8..a3510441f7d7 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1540,8 +1540,8 @@ int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 	ghc->generation = slots->generation;
 	ghc->len = len;
 	ghc->memslot = gfn_to_memslot(kvm, start_gfn);
-	ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, &nr_pages_avail);
-	if (!kvm_is_error_hva(ghc->hva) && nr_pages_avail >= nr_pages_needed) {
+	ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, NULL);
+	if (!kvm_is_error_hva(ghc->hva) && nr_pages_needed <= 1) {
 		ghc->hva += offset;
 	} else {
 		/*
-- 
2.3.7

[PATCH 3.12 018/142] MIPS: Hibernate: flush TLB entries earlier

[Jiri Slaby]

From: Huacai Chen <chenhc@lemote.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit a843d00d038b11267279e3b5388222320f9ddc1d upstream.

We found that TLB mismatch not only happens after kernel resume, but
also happens during snapshot restore. So move it to the beginning of
swsusp_arch_suspend().

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/9621/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/mips/power/hibernate.S | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/mips/power/hibernate.S b/arch/mips/power/hibernate.S
index 32a7c828f073..e7567c8a9e79 100644
--- a/arch/mips/power/hibernate.S
+++ b/arch/mips/power/hibernate.S
@@ -30,6 +30,8 @@ LEAF(swsusp_arch_suspend)
 END(swsusp_arch_suspend)
 
 LEAF(swsusp_arch_resume)
+	/* Avoid TLB mismatch during and after kernel resume */
+	jal local_flush_tlb_all
 	PTR_L t0, restore_pblist
 0:
 	PTR_L t1, PBE_ADDRESS(t0)   /* source */
@@ -43,7 +45,6 @@ LEAF(swsusp_arch_resume)
 	bne t1, t3, 1b
 	PTR_L t0, PBE_NEXT(t0)
 	bnez t0, 0b
-	jal local_flush_tlb_all /* Avoid TLB mismatch after kernel resume */
 	PTR_LA t0, saved_regs
 	PTR_L ra, PT_R31(t0)
 	PTR_L sp, PT_R29(t0)
-- 
2.3.7

[PATCH 3.12 019/142] cdc-wdm: fix endianness bug in debug statements

[Jiri Slaby]

From: Oliver Neukum <oneukum@suse.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 323ece54e0761198946ecd0c2091f1d2bfdfcb64 upstream.

Values directly from descriptors given in debug statements
must be converted to native endianness.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/class/cdc-wdm.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 6463ca3bcfba..07133d0c971b 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -244,7 +244,7 @@ static void wdm_int_callback(struct urb *urb)
 	case USB_CDC_NOTIFY_RESPONSE_AVAILABLE:
 		dev_dbg(&desc->intf->dev,
 			"NOTIFY_RESPONSE_AVAILABLE received: index %d len %d",
-			dr->wIndex, dr->wLength);
+			le16_to_cpu(dr->wIndex), le16_to_cpu(dr->wLength));
 		break;
 
 	case USB_CDC_NOTIFY_NETWORK_CONNECTION:
@@ -257,7 +257,9 @@ static void wdm_int_callback(struct urb *urb)
 		clear_bit(WDM_POLL_RUNNING, &desc->flags);
 		dev_err(&desc->intf->dev,
 			"unknown notification %d received: index %d len %d\n",
-			dr->bNotificationType, dr->wIndex, dr->wLength);
+			dr->bNotificationType,
+			le16_to_cpu(dr->wIndex),
+			le16_to_cpu(dr->wLength));
 		goto exit;
 	}
 
@@ -403,7 +405,7 @@ static ssize_t wdm_write
 			     USB_RECIP_INTERFACE);
 	req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
 	req->wValue = 0;
-	req->wIndex = desc->inum;
+	req->wIndex = desc->inum; /* already converted */
 	req->wLength = cpu_to_le16(count);
 	set_bit(WDM_IN_USE, &desc->flags);
 	desc->outbuf = buf;
@@ -417,7 +419,7 @@ static ssize_t wdm_write
 		rv = usb_translate_errors(rv);
 	} else {
 		dev_dbg(&desc->intf->dev, "Tx URB has been submitted index=%d",
-			req->wIndex);
+			le16_to_cpu(req->wIndex));
 	}
 out:
 	usb_autopm_put_interface(desc->intf);
@@ -780,7 +782,7 @@ static int wdm_create(struct usb_interface *intf, struct usb_endpoint_descriptor
 	desc->irq->bRequestType = (USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE);
 	desc->irq->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
 	desc->irq->wValue = 0;
-	desc->irq->wIndex = desc->inum;
+	desc->irq->wIndex = desc->inum; /* already converted */
 	desc->irq->wLength = cpu_to_le16(desc->wMaxCommand);
 
 	usb_fill_control_urb(
-- 
2.3.7

[PATCH 3.12 020/142] spi: spidev: fix possible arithmetic overflow for multi-transfer message

[Jiri Slaby]

From: Ian Abbott <abbotti@mev.co.uk>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit f20fbaad7620af2df36a1f9d1c9ecf48ead5b747 upstream.

`spidev_message()` sums the lengths of the individual SPI transfers to
determine the overall SPI message length.  It restricts the total
length, returning an error if too long, but it does not check for
arithmetic overflow.  For example, if the SPI message consisted of two
transfers and the first has a length of 10 and the second has a length
of (__u32)(-1), the total length would be seen as 9, even though the
second transfer is actually very long.  If the second transfer specifies
a null `rx_buf` and a non-null `tx_buf`, the `copy_from_user()` could
overrun the spidev's pre-allocated tx buffer before it reaches an
invalid user memory address.  Fix it by checking that neither the total
nor the individual transfer lengths exceed the maximum allowed value.

Thanks to Dan Carpenter for reporting the potential integer overflow.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/spi/spidev.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index ca5bcfe874d0..2466632c2c01 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -243,7 +243,10 @@ static int spidev_message(struct spidev_data *spidev,
 		k_tmp->len = u_tmp->len;
 
 		total += k_tmp->len;
-		if (total > bufsiz) {
+		/* Check total length of transfers.  Also check each
+		 * transfer length to avoid arithmetic overflow.
+		 */
+		if (total > bufsiz || k_tmp->len > bufsiz) {
 			status = -EMSGSIZE;
 			goto done;
 		}
-- 
2.3.7

[PATCH 3.12 021/142] compal-laptop: Check return value of power_supply_register

[Jiri Slaby]

From: Krzysztof Kozlowski <k.kozlowski@samsung.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 1915a718b1872edffcb13e5436a9f7302d3d36f0 upstream.

The return value of power_supply_register() call was not checked and
even on error probe() function returned 0. If registering failed then
during unbind the driver tried to unregister power supply which was not
actually registered.

This could lead to memory corruption because power_supply_unregister()
unconditionally cleans up given power supply.

Fix this by checking return status of power_supply_register() call. In
case of failure, clean up sysfs entries and fail the probe.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes: 9be0fcb5ed46 ("compal-laptop: add JHL90, battery & hwmon interface")
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz> [backport to 3.12]
---
 drivers/platform/x86/compal-laptop.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/compal-laptop.c b/drivers/platform/x86/compal-laptop.c
index eaa78edb1f4e..b978cd3556a4 100644
--- a/drivers/platform/x86/compal-laptop.c
+++ b/drivers/platform/x86/compal-laptop.c
@@ -1049,7 +1049,13 @@ static int compal_probe(struct platform_device *pdev)
 
 	/* Power supply */
 	initialize_power_supply_data(data);
-	power_supply_register(&compal_device->dev, &data->psy);
+	err = power_supply_register(&compal_device->dev, &data->psy);
+	if (err < 0) {
+		hwmon_device_unregister(data->hwmon_dev);
+		sysfs_remove_group(&pdev->dev.kobj, &compal_attribute_group);
+		kfree(data);
+		return err;
+	}
 
 	platform_set_drvdata(pdev, data);
 
-- 
2.3.7

[PATCH 3.12 022/142] ring-buffer: Replace this_cpu_*() with __this_cpu_*()

[Jiri Slaby]

From: Steven Rostedt <rostedt@goodmis.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 80a9b64e2c156b6523e7a01f2ba6e5d86e722814 upstream.

It has come to my attention that this_cpu_read/write are horrible on
architectures other than x86. Worse yet, they actually disable
preemption or interrupts! This caused some unexpected tracing results
on ARM.

   101.356868: preempt_count_add <-ring_buffer_lock_reserve
   101.356870: preempt_count_sub <-ring_buffer_lock_reserve

The ring_buffer_lock_reserve has recursion protection that requires
accessing a per cpu variable. But since preempt_disable() is traced, it
too got traced while accessing the variable that is suppose to prevent
recursion like this.

The generic version of this_cpu_read() and write() are:

 #define this_cpu_generic_read(pcp)					\
 ({	typeof(pcp) ret__;						\
	preempt_disable();						\
	ret__ = *this_cpu_ptr(&(pcp));					\
	preempt_enable();						\
	ret__;								\
 })

 #define this_cpu_generic_to_op(pcp, val, op)				\
 do {									\
	unsigned long flags;						\
	raw_local_irq_save(flags);					\
	*__this_cpu_ptr(&(pcp)) op val;					\
	raw_local_irq_restore(flags);					\
 } while (0)

Which is unacceptable for locations that know they are within preempt
disabled or interrupt disabled locations.

Paul McKenney stated that __this_cpu_() versions produce much better code on
other architectures than this_cpu_() does, if we know that the call is done in
a preempt disabled location.

I also changed the recursive_unlock() to use two local variables instead
of accessing the per_cpu variable twice.

Link: http://lkml.kernel.org/r/20150317114411.GE3589@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/20150317104038.312e73d1@gandalf.local.home

Acked-by: Christoph Lameter <cl@linux.com>
Reported-by: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
Tested-by: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 kernel/trace/ring_buffer.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 21ee379e3e4b..469af802d14e 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -2651,7 +2651,7 @@ static DEFINE_PER_CPU(unsigned int, current_context);
 
 static __always_inline int trace_recursive_lock(void)
 {
-	unsigned int val = this_cpu_read(current_context);
+	unsigned int val = __this_cpu_read(current_context);
 	int bit;
 
 	if (in_interrupt()) {
@@ -2668,18 +2668,17 @@ static __always_inline int trace_recursive_lock(void)
 		return 1;
 
 	val |= (1 << bit);
-	this_cpu_write(current_context, val);
+	__this_cpu_write(current_context, val);
 
 	return 0;
 }
 
 static __always_inline void trace_recursive_unlock(void)
 {
-	unsigned int val = this_cpu_read(current_context);
+	unsigned int val = __this_cpu_read(current_context);
 
-	val--;
-	val &= this_cpu_read(current_context);
-	this_cpu_write(current_context, val);
+	val &= val & (val - 1);
+	__this_cpu_write(current_context, val);
 }
 
 #else
-- 
2.3.7

[PATCH 3.12 023/142] power_supply: twl4030_madc: Check return value of power_supply_register

[Jiri Slaby]

From: Krzysztof Kozlowski <k.kozlowski@samsung.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 68c3ed6fa7e0d69529ced772d650ab128916a81d upstream.

The return value of power_supply_register() call was not checked and
even on error probe() function returned 0. If registering failed then
during unbind the driver tried to unregister power supply which was not
actually registered.

This could lead to memory corruption because power_supply_unregister()
unconditionally cleans up given power supply.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes: da0a00ebc239 ("power: Add twl4030_madc battery driver.")
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/power/twl4030_madc_battery.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/power/twl4030_madc_battery.c b/drivers/power/twl4030_madc_battery.c
index 7ef445a6cfa6..cf907609ec49 100644
--- a/drivers/power/twl4030_madc_battery.c
+++ b/drivers/power/twl4030_madc_battery.c
@@ -192,6 +192,7 @@ static int twl4030_madc_battery_probe(struct platform_device *pdev)
 {
 	struct twl4030_madc_battery *twl4030_madc_bat;
 	struct twl4030_madc_bat_platform_data *pdata = pdev->dev.platform_data;
+	int ret = 0;
 
 	twl4030_madc_bat = kzalloc(sizeof(*twl4030_madc_bat), GFP_KERNEL);
 	if (!twl4030_madc_bat)
@@ -216,9 +217,11 @@ static int twl4030_madc_battery_probe(struct platform_device *pdev)
 
 	twl4030_madc_bat->pdata = pdata;
 	platform_set_drvdata(pdev, twl4030_madc_bat);
-	power_supply_register(&pdev->dev, &twl4030_madc_bat->psy);
+	ret = power_supply_register(&pdev->dev, &twl4030_madc_bat->psy);
+	if (ret < 0)
+		kfree(twl4030_madc_bat);
 
-	return 0;
+	return ret;
 }
 
 static int twl4030_madc_battery_remove(struct platform_device *pdev)
-- 
2.3.7

[PATCH 3.12 024/142] power_supply: lp8788-charger: Fix leaked power supply on probe fail

[Jiri Slaby]

From: Krzysztof Kozlowski <k.kozlowski@samsung.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit a7117f81e8391e035c49b3440792f7e6cea28173 upstream.

Driver forgot to unregister charger power supply if registering of
battery supply failed in probe(). In such case the memory associated
with power supply leaked.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes: 98a276649358 ("power_supply: Add new lp8788 charger driver")
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/power/lp8788-charger.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/power/lp8788-charger.c b/drivers/power/lp8788-charger.c
index ed49b50b220b..72da2a6c22db 100644
--- a/drivers/power/lp8788-charger.c
+++ b/drivers/power/lp8788-charger.c
@@ -417,8 +417,10 @@ static int lp8788_psy_register(struct platform_device *pdev,
 	pchg->battery.num_properties = ARRAY_SIZE(lp8788_battery_prop);
 	pchg->battery.get_property = lp8788_battery_get_property;
 
-	if (power_supply_register(&pdev->dev, &pchg->battery))
+	if (power_supply_register(&pdev->dev, &pchg->battery)) {
+		power_supply_unregister(&pchg->charger);
 		return -EPERM;
+	}
 
 	return 0;
 }
-- 
2.3.7

[PATCH 3.12 025/142] ARM: 8320/1: fix integer overflow in ELF_ET_DYN_BASE

[Jiri Slaby]

From: Andrey Ryabinin <a.ryabinin@samsung.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 8defb3367fcd19d1af64c07792aade0747b54e0f upstream.

Usually ELF_ET_DYN_BASE is 2/3 of TASK_SIZE. With 3G/1G user/kernel
split this is not so, because 2*TASK_SIZE overflows 32 bits,
so the actual value of ELF_ET_DYN_BASE is:
	(2 * TASK_SIZE / 3) = 0x2a000000

When ASLR is disabled PIE binaries will load at ELF_ET_DYN_BASE address.
On 32bit platforms AddressSanitzer uses addresses [0x20000000 - 0x40000000]
for shadow memory [1]. So ASan doesn't work for PIE binaries when ASLR disabled
as it fails to map shadow memory.
Also after Kees's 'split ET_DYN ASLR from mmap ASLR' patchset PIE binaries
has a high chance of loading somewhere in between [0x2a000000 - 0x40000000]
even if ASLR enabled. This makes ASan with PIE absolutely incompatible.

Fix overflow by dividing TASK_SIZE prior to multiplying.
After this patch ELF_ET_DYN_BASE equals to (for CONFIG_VMSPLIT_3G=y):
	(TASK_SIZE / 3 * 2) = 0x7f555554

[1] https://code.google.com/p/address-sanitizer/wiki/AddressSanitizerAlgorithm#Mapping

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Reported-by: Maria Guseva <m.guseva@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm/include/asm/elf.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h
index f4b46d39b9cf..051b7269e639 100644
--- a/arch/arm/include/asm/elf.h
+++ b/arch/arm/include/asm/elf.h
@@ -114,7 +114,7 @@ int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs);
    the loader.  We need to make sure that it is out of the way of the program
    that it will "exec", and that there is sufficient room for the brk.  */
 
-#define ELF_ET_DYN_BASE	(2 * TASK_SIZE / 3)
+#define ELF_ET_DYN_BASE	(TASK_SIZE / 3 * 2)
 
 /* When the program starts, a1 contains a pointer to a function to be 
    registered with atexit, as per the SVR4 ABI.  A value of 0 means we 
-- 
2.3.7

[PATCH 3.12 026/142] ARM: S3C64XX: Use fixed IRQ bases to avoid conflicts on Cragganmore

[Jiri Slaby]

From: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 4e330ae4ab2915444f1e6dca1358a910aa259362 upstream.

There are two PMICs on Cragganmore, currently one dynamically assign
its IRQ base and the other uses a fixed base. It is possible for the
statically assigned PMIC to fail if its IRQ is taken by the dynamically
assigned one. Fix this by statically assigning both the IRQ bases.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm/mach-s3c64xx/crag6410.h      | 1 +
 arch/arm/mach-s3c64xx/mach-crag6410.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/arm/mach-s3c64xx/crag6410.h b/arch/arm/mach-s3c64xx/crag6410.h
index 4c3c9994fc2c..81dc722ced57 100644
--- a/arch/arm/mach-s3c64xx/crag6410.h
+++ b/arch/arm/mach-s3c64xx/crag6410.h
@@ -14,6 +14,7 @@
 #include <linux/gpio.h>
 
 #define GLENFARCLAS_PMIC_IRQ_BASE	IRQ_BOARD_START
+#define BANFF_PMIC_IRQ_BASE		(IRQ_BOARD_START + 64)
 
 #define PCA935X_GPIO_BASE		GPIO_BOARD_START
 #define CODEC_GPIO_BASE			(GPIO_BOARD_START + 8)
diff --git a/arch/arm/mach-s3c64xx/mach-crag6410.c b/arch/arm/mach-s3c64xx/mach-crag6410.c
index eb8e5a1aca42..27180bd93832 100644
--- a/arch/arm/mach-s3c64xx/mach-crag6410.c
+++ b/arch/arm/mach-s3c64xx/mach-crag6410.c
@@ -558,6 +558,7 @@ static struct wm831x_touch_pdata touch_pdata = {
 
 static struct wm831x_pdata crag_pmic_pdata = {
 	.wm831x_num = 1,
+	.irq_base = BANFF_PMIC_IRQ_BASE,
 	.gpio_base = BANFF_PMIC_GPIO_BASE,
 	.soft_shutdown = true,
 
-- 
2.3.7

[PATCH 3.12 027/142] ARM: dts: dove: Fix uart[23] reg property

[Jiri Slaby]

From: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit a74cd13b807029397f7232449df929bac11fb228 upstream.

Fix Dove's register addresses of uart2 and uart3 nodes that seem to
be broken since ages due to a copy-and-paste error.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm/boot/dts/dove.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/dove.dtsi b/arch/arm/boot/dts/dove.dtsi
index cc279166646f..72bf0257ab78 100644
--- a/arch/arm/boot/dts/dove.dtsi
+++ b/arch/arm/boot/dts/dove.dtsi
@@ -106,7 +106,7 @@
 
 		uart2: serial@12200 {
 			compatible = "ns16550a";
-			reg = <0x12000 0x100>;
+			reg = <0x12200 0x100>;
 			reg-shift = <2>;
 			interrupts = <9>;
 			clocks = <&core_clk 0>;
@@ -115,7 +115,7 @@
 
 		uart3: serial@12300 {
 			compatible = "ns16550a";
-			reg = <0x12100 0x100>;
+			reg = <0x12300 0x100>;
 			reg-shift = <2>;
 			interrupts = <10>;
 			clocks = <&core_clk 0>;
-- 
2.3.7

[PATCH 3.12 028/142] usb: phy: Find the right match in devm_usb_phy_match

[Jiri Slaby]

From: Axel Lin <axel.lin@ingics.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 869aee0f31429fa9d94d5aef539602b73ae0cf4b upstream.

The res parameter passed to devm_usb_phy_match() is the location where the
pointer to the usb_phy is stored, hence it needs to be dereferenced before
comparing to the match data in order to find the correct match.

Fixes: 410219dcd2ba ("usb: otg: utils: devres: Add API's to associate a device with the phy")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/phy/phy.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c
index 5d7966b8fe98..4fee0cce3dce 100644
--- a/drivers/usb/phy/phy.c
+++ b/drivers/usb/phy/phy.c
@@ -78,7 +78,9 @@ static void devm_usb_phy_release(struct device *dev, void *res)
 
 static int devm_usb_phy_match(struct device *dev, void *res, void *match_data)
 {
-	return res == match_data;
+	struct usb_phy **phy = res;
+
+	return *phy == match_data;
 }
 
 /**
-- 
2.3.7

[PATCH 3.12 029/142] usb: define a generic USB_RESUME_TIMEOUT macro

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 62f0342de1f012f3e90607d39e20fce811391169 upstream.

Every USB Host controller should use this new
macro to define for how long resume signalling
should be driven on the bus.

Currently, almost every single USB controller
is using a 20ms timeout for resume signalling.

That's problematic for two reasons:

a) sometimes that 20ms timer expires a little
before 20ms, which makes us fail certification

b) some (many) devices actually need more than
20ms resume signalling.

Sure, in case of (b) we can state that the device
is against the USB spec, but the fact is that
we have no control over which device the certification
lab will use. We also have no control over which host
they will use. Most likely they'll be using a Windows
PC which, again, we have no control over how that
USB stack is written and how long resume signalling
they are using.

At the end of the day, we must make sure Linux passes
electrical compliance when working as Host or as Device
and currently we don't pass compliance as host because
we're driving resume signallig for exactly 20ms and
that confuses certification test setup resulting in
Certification failure.

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 include/linux/usb.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/include/linux/usb.h b/include/linux/usb.h
index 39cfa0aca91f..6b37946481e8 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -206,6 +206,32 @@ void usb_put_intf(struct usb_interface *intf);
 #define USB_MAXINTERFACES	32
 #define USB_MAXIADS		(USB_MAXINTERFACES/2)
 
+/*
+ * USB Resume Timer: Every Host controller driver should drive the resume
+ * signalling on the bus for the amount of time defined by this macro.
+ *
+ * That way we will have a 'stable' behavior among all HCDs supported by Linux.
+ *
+ * Note that the USB Specification states we should drive resume for *at least*
+ * 20 ms, but it doesn't give an upper bound. This creates two possible
+ * situations which we want to avoid:
+ *
+ * (a) sometimes an msleep(20) might expire slightly before 20 ms, which causes
+ * us to fail USB Electrical Tests, thus failing Certification
+ *
+ * (b) Some (many) devices actually need more than 20 ms of resume signalling,
+ * and while we can argue that's against the USB Specification, we don't have
+ * control over which devices a certification laboratory will be using for
+ * certification. If CertLab uses a device which was tested against Windows and
+ * that happens to have relaxed resume signalling rules, we might fall into
+ * situations where we fail interoperability and electrical tests.
+ *
+ * In order to avoid both conditions, we're using a 40 ms resume timeout, which
+ * should cope with both LPJ calibration errors and devices not following every
+ * detail of the USB Specification.
+ */
+#define USB_RESUME_TIMEOUT	40 /* ms */
+
 /**
  * struct usb_interface_cache - long-term representation of a device interface
  * @num_altsetting: number of altsettings defined.
-- 
2.3.7

[PATCH 3.12 030/142] usb: host: fusbh200: use new USB_RESUME_TIMEOUT

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 595227db1f2d98bfc33f02a55842f268e12b247d upstream.

Make sure we're using the new macro, so our
resume signaling will always pass certification.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/host/fusbh200-hcd.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/host/fusbh200-hcd.c b/drivers/usb/host/fusbh200-hcd.c
index 299253c826c7..0def3ed72013 100644
--- a/drivers/usb/host/fusbh200-hcd.c
+++ b/drivers/usb/host/fusbh200-hcd.c
@@ -1610,10 +1610,9 @@ static int fusbh200_hub_control (
 			if ((temp & PORT_PE) == 0)
 				goto error;
 
-			/* resume signaling for 20 msec */
 			fusbh200_writel(fusbh200, temp | PORT_RESUME, status_reg);
 			fusbh200->reset_done[wIndex] = jiffies
-					+ msecs_to_jiffies(20);
+					+ msecs_to_jiffies(USB_RESUME_TIMEOUT);
 			break;
 		case USB_PORT_FEAT_C_SUSPEND:
 			clear_bit(wIndex, &fusbh200->port_c_suspend);
-- 
2.3.7

[PATCH 3.12 031/142] usb: host: uhci: use new USB_RESUME_TIMEOUT

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit b8fb6f79f76f478acbbffccc966daa878f172a0a upstream.

Make sure we're using the new macro, so our
resume signaling will always pass certification.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/host/uhci-hub.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/uhci-hub.c b/drivers/usb/host/uhci-hub.c
index 9189bc984c98..a3e9f986af6c 100644
--- a/drivers/usb/host/uhci-hub.c
+++ b/drivers/usb/host/uhci-hub.c
@@ -167,7 +167,7 @@ static void uhci_check_ports(struct uhci_hcd *uhci)
 				/* Port received a wakeup request */
 				set_bit(port, &uhci->resuming_ports);
 				uhci->ports_timeout = jiffies +
-						msecs_to_jiffies(25);
+					msecs_to_jiffies(USB_RESUME_TIMEOUT);
 				usb_hcd_start_port_resume(
 						&uhci_to_hcd(uhci)->self, port);
 
@@ -337,7 +337,8 @@ static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			uhci_finish_suspend(uhci, port, port_addr);
 
 			/* USB v2.0 7.1.7.5 */
-			uhci->ports_timeout = jiffies + msecs_to_jiffies(50);
+			uhci->ports_timeout = jiffies +
+				msecs_to_jiffies(USB_RESUME_TIMEOUT);
 			OK(0);
 		case USB_PORT_FEAT_POWER:
 			/* UHCI has no power switching */
-- 
2.3.7

[PATCH 3.12 032/142] usb: host: fotg210: use new USB_RESUME_TIMEOUT

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 7e136bb71a08e8b8be3bc492f041d9b0bea3856d upstream.

Make sure we're using the new macro, so our
resume signaling will always pass certification.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/host/fotg210-hcd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/fotg210-hcd.c b/drivers/usb/host/fotg210-hcd.c
index fce13bcc4a3e..be85c69ad49e 100644
--- a/drivers/usb/host/fotg210-hcd.c
+++ b/drivers/usb/host/fotg210-hcd.c
@@ -1651,7 +1651,7 @@ static int fotg210_hub_control(
 			/* resume signaling for 20 msec */
 			fotg210_writel(fotg210, temp | PORT_RESUME, status_reg);
 			fotg210->reset_done[wIndex] = jiffies
-					+ msecs_to_jiffies(20);
+					+ msecs_to_jiffies(USB_RESUME_TIMEOUT);
 			break;
 		case USB_PORT_FEAT_C_SUSPEND:
 			clear_bit(wIndex, &fotg210->port_c_suspend);
-- 
2.3.7

[PATCH 3.12 033/142] usb: host: r8a66597: use new USB_RESUME_TIMEOUT

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 7a606ac29752a3e571b83f9b3fceb1eaa1d37781 upstream.

While this driver was already using a 50ms resume
timeout, let's make sure everybody uses the same
macro so it's easy to fix later should anything
go wrong.

It also gives a more "stable" expectation to Linux
users.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/host/r8a66597-hcd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index 2ad004ae747c..736f4370abf8 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -2301,7 +2301,7 @@ static int r8a66597_bus_resume(struct usb_hcd *hcd)
 		rh->port &= ~USB_PORT_STAT_SUSPEND;
 		rh->port |= USB_PORT_STAT_C_SUSPEND << 16;
 		r8a66597_mdfy(r8a66597, RESUME, RESUME | UACT, dvstctr_reg);
-		msleep(50);
+		msleep(USB_RESUME_TIMEOUT);
 		r8a66597_mdfy(r8a66597, UACT, RESUME | UACT, dvstctr_reg);
 	}
 
-- 
2.3.7

[PATCH 3.12 034/142] usb: host: isp116x: use new USB_RESUME_TIMEOUT

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 8c0ae6574ccfd3d619876a65829aad74c9d22ba5 upstream.

Make sure we're using the new macro, so our
resume signaling will always pass certification.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/host/isp116x-hcd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c
index c7d0f8f231be..200d33fc4a46 100644
--- a/drivers/usb/host/isp116x-hcd.c
+++ b/drivers/usb/host/isp116x-hcd.c
@@ -1488,7 +1488,7 @@ static int isp116x_bus_resume(struct usb_hcd *hcd)
 	spin_unlock_irq(&isp116x->lock);
 
 	hcd->state = HC_STATE_RESUMING;
-	msleep(20);
+	msleep(USB_RESUME_TIMEOUT);
 
 	/* Go operational */
 	spin_lock_irq(&isp116x->lock);
-- 
2.3.7

[PATCH 3.12 035/142] usb: host: xhci: use new USB_RESUME_TIMEOUT

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit b9e451885deb6262dbaf5cd14aa77d192d9ac759 upstream.

Make sure we're using the new macro, so our
resume signaling will always pass certification.

Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/host/xhci-ring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 6bf308798a2d..75dc6647ba22 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1735,7 +1735,7 @@ static void handle_port_status(struct xhci_hcd *xhci,
 		} else {
 			xhci_dbg(xhci, "resume HS port %d\n", port_id);
 			bus_state->resume_done[faked_port_index] = jiffies +
-				msecs_to_jiffies(20);
+				msecs_to_jiffies(USB_RESUME_TIMEOUT);
 			set_bit(faked_port_index, &bus_state->resuming_ports);
 			mod_timer(&hcd->rh_timer,
 				  bus_state->resume_done[faked_port_index]);
-- 
2.3.7

[PATCH 3.12 036/142] usb: host: sl811: use new USB_RESUME_TIMEOUT

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 08debfb13b199716da6153940c31968c556b195d upstream.

Make sure we're using the new macro, so our
resume signaling will always pass certification.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/host/sl811-hcd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c
index 5477bf5df218..6b488be61508 100644
--- a/drivers/usb/host/sl811-hcd.c
+++ b/drivers/usb/host/sl811-hcd.c
@@ -1260,7 +1260,7 @@ sl811h_hub_control(
 			sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
 
 			mod_timer(&sl811->timer, jiffies
-					+ msecs_to_jiffies(20));
+					+ msecs_to_jiffies(USB_RESUME_TIMEOUT));
 			break;
 		case USB_PORT_FEAT_POWER:
 			port_power(sl811, 0);
-- 
2.3.7

[PATCH 3.12 037/142] usb: dwc2: hcd: use new USB_RESUME_TIMEOUT

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 74bd7b69801819707713b88e9d0bc074efa2f5e7 upstream.

Make sure we're using the new macro, so our
resume signaling will always pass certification.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/staging/dwc2/hcd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/dwc2/hcd.c b/drivers/staging/dwc2/hcd.c
index da0d35cc33ce..690e468e9a85 100644
--- a/drivers/staging/dwc2/hcd.c
+++ b/drivers/staging/dwc2/hcd.c
@@ -1462,7 +1462,7 @@ static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
 			dev_dbg(hsotg->dev,
 				"ClearPortFeature USB_PORT_FEAT_SUSPEND\n");
 			writel(0, hsotg->regs + PCGCTL);
-			usleep_range(20000, 40000);
+			msleep(USB_RESUME_TIMEOUT);
 
 			hprt0 = dwc2_read_hprt0(hsotg);
 			hprt0 |= HPRT0_RES;
-- 
2.3.7

[PATCH 3.12 038/142] usb: core: hub: use new USB_RESUME_TIMEOUT

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit bbc78c07a51f6fd29c227b1220a9016e585358ba upstream.

Make sure we're using the new macro, so our
resume signaling will always pass certification.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/core/hub.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 420bf9bb09e5..78141993dfd0 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3284,10 +3284,10 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg)
 		dev_dbg(hub->intfdev, "can't resume port %d, status %d\n",
 				port1, status);
 	} else {
-		/* drive resume for at least 20 msec */
+		/* drive resume for USB_RESUME_TIMEOUT msec */
 		dev_dbg(&udev->dev, "usb %sresume\n",
 				(PMSG_IS_AUTO(msg) ? "auto-" : ""));
-		msleep(25);
+		msleep(USB_RESUME_TIMEOUT);
 
 		/* Virtual root hubs can trigger on GET_PORT_STATUS to
 		 * stop resume signaling.  Then finish the resume
-- 
2.3.7

[PATCH 3.12 039/142] ALSA: emu10k1: don't deadlock in proc-functions

[Jiri Slaby]

From: Michael Gernoth <michael@gernoth.net>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 91bf0c2dcb935a87e5c0795f5047456b965fd143 upstream.

The functions snd_emu10k1_proc_spdif_read and snd_emu1010_fpga_read
acquire the emu_lock before accessing the FPGA. The function used
to access the FPGA (snd_emu1010_fpga_read) also tries to take
the emu_lock which causes a deadlock.
Remove the outer locking in the proc-functions (guarding only the
already safe fpga read) to prevent this deadlock.

[removed superfluous flags variables too -- tiwai]

Signed-off-by: Michael Gernoth <michael@gernoth.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 sound/pci/emu10k1/emuproc.c | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/sound/pci/emu10k1/emuproc.c b/sound/pci/emu10k1/emuproc.c
index 2ca9f2e93139..53745f4c2bf5 100644
--- a/sound/pci/emu10k1/emuproc.c
+++ b/sound/pci/emu10k1/emuproc.c
@@ -241,31 +241,22 @@ static void snd_emu10k1_proc_spdif_read(struct snd_info_entry *entry,
 	struct snd_emu10k1 *emu = entry->private_data;
 	u32 value;
 	u32 value2;
-	unsigned long flags;
 	u32 rate;
 
 	if (emu->card_capabilities->emu_model) {
-		spin_lock_irqsave(&emu->emu_lock, flags);
 		snd_emu1010_fpga_read(emu, 0x38, &value);
-		spin_unlock_irqrestore(&emu->emu_lock, flags);
 		if ((value & 0x1) == 0) {
-			spin_lock_irqsave(&emu->emu_lock, flags);
 			snd_emu1010_fpga_read(emu, 0x2a, &value);
 			snd_emu1010_fpga_read(emu, 0x2b, &value2);
-			spin_unlock_irqrestore(&emu->emu_lock, flags);
 			rate = 0x1770000 / (((value << 5) | value2)+1);	
 			snd_iprintf(buffer, "ADAT Locked : %u\n", rate);
 		} else {
 			snd_iprintf(buffer, "ADAT Unlocked\n");
 		}
-		spin_lock_irqsave(&emu->emu_lock, flags);
 		snd_emu1010_fpga_read(emu, 0x20, &value);
-		spin_unlock_irqrestore(&emu->emu_lock, flags);
 		if ((value & 0x4) == 0) {
-			spin_lock_irqsave(&emu->emu_lock, flags);
 			snd_emu1010_fpga_read(emu, 0x28, &value);
 			snd_emu1010_fpga_read(emu, 0x29, &value2);
-			spin_unlock_irqrestore(&emu->emu_lock, flags);
 			rate = 0x1770000 / (((value << 5) | value2)+1);	
 			snd_iprintf(buffer, "SPDIF Locked : %d\n", rate);
 		} else {
@@ -410,14 +401,11 @@ static void snd_emu_proc_emu1010_reg_read(struct snd_info_entry *entry,
 {
 	struct snd_emu10k1 *emu = entry->private_data;
 	u32 value;
-	unsigned long flags;
 	int i;
 	snd_iprintf(buffer, "EMU1010 Registers:\n\n");
 
 	for(i = 0; i < 0x40; i+=1) {
-		spin_lock_irqsave(&emu->emu_lock, flags);
 		snd_emu1010_fpga_read(emu, i, &value);
-		spin_unlock_irqrestore(&emu->emu_lock, flags);
 		snd_iprintf(buffer, "%02X: %08X, %02X\n", i, value, (value >> 8) & 0x7f);
 	}
 }
-- 
2.3.7

[PATCH 3.12 040/142] Input: elantech - fix absolute mode setting on some ASUS laptops

[Jiri Slaby]

From: Ulrik De Bie <ulrik.debie-os@e2big.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit bd884149aca61de269fd9bad83fe2a4232ffab21 upstream.

On ASUS TP500LN and X750JN, the touchpad absolute mode is reset each
time set_rate is done.

In order to fix this, we will verify the firmware version, and if it
matches the one in those laptops, the set_rate function is overloaded
with a function elantech_set_rate_restore_reg_07 that performs the
set_rate with the original function, followed by a restore of reg_07
(the register that sets the absolute mode on elantech v4 hardware).

Also the ASUS TP500LN and X750JN firmware version, capabilities, and
button constellation is added to elantech.c

Reported-and-tested-by: George Moutsopoulos <gmoutso@yahoo.co.uk>
Signed-off-by: Ulrik De Bie <ulrik.debie-os@e2big.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/input/mouse/elantech.c | 22 ++++++++++++++++++++++
 drivers/input/mouse/elantech.h |  1 +
 2 files changed, 23 insertions(+)

diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 0ec8604aadcf..04a7d9f00928 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -814,6 +814,21 @@ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
 }
 
 /*
+ * This writes the reg_07 value again to the hardware at the end of every
+ * set_rate call because the register loses its value. reg_07 allows setting
+ * absolute mode on v4 hardware
+ */
+static void elantech_set_rate_restore_reg_07(struct psmouse *psmouse,
+		unsigned int rate)
+{
+	struct elantech_data *etd = psmouse->private;
+
+	etd->original_set_rate(psmouse, rate);
+	if (elantech_write_reg(psmouse, 0x07, etd->reg_07))
+		psmouse_err(psmouse, "restoring reg_07 failed\n");
+}
+
+/*
  * Put the touchpad into absolute mode
  */
 static int elantech_set_absolute_mode(struct psmouse *psmouse)
@@ -1015,6 +1030,8 @@ static int elantech_get_resolution_v4(struct psmouse *psmouse,
  * Asus K53SV              0x450f01        78, 15, 0c      2 hw buttons
  * Asus G46VW              0x460f02        00, 18, 0c      2 hw buttons
  * Asus G750JX             0x360f00        00, 16, 0c      2 hw buttons
+ * Asus TP500LN            0x381f17        10, 14, 0e      clickpad
+ * Asus X750JN             0x381f17        10, 14, 0e      clickpad
  * Asus UX31               0x361f00        20, 15, 0e      clickpad
  * Asus UX32VD             0x361f02        00, 15, 0e      clickpad
  * Avatar AVIU-145A2       0x361f00        ?               clickpad
@@ -1523,6 +1540,11 @@ int elantech_init(struct psmouse *psmouse)
 		goto init_fail;
 	}
 
+	if (etd->fw_version == 0x381f17) {
+		etd->original_set_rate = psmouse->set_rate;
+		psmouse->set_rate = elantech_set_rate_restore_reg_07;
+	}
+
 	if (elantech_set_input_params(psmouse)) {
 		psmouse_err(psmouse, "failed to query touchpad range.\n");
 		goto init_fail;
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index 9e0e2a1f340d..59263a3a8667 100644
--- a/drivers/input/mouse/elantech.h
+++ b/drivers/input/mouse/elantech.h
@@ -139,6 +139,7 @@ struct elantech_data {
 	struct finger_pos mt[ETP_MAX_FINGERS];
 	unsigned char parity[256];
 	int (*send_cmd)(struct psmouse *psmouse, unsigned char c, unsigned char *param);
+	void (*original_set_rate)(struct psmouse *psmouse, unsigned int rate);
 };
 
 #ifdef CONFIG_MOUSE_PS2_ELANTECH
-- 
2.3.7

[PATCH 3.12 041/142] fs/binfmt_elf.c: fix bug in loading of PIE binaries

[Jiri Slaby]

From: Michael Davidson <md@google.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit a87938b2e246b81b4fb713edb371a9fa3c5c3c86 upstream.

With CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE enabled, and a normal top-down
address allocation strategy, load_elf_binary() will attempt to map a PIE
binary into an address range immediately below mm->mmap_base.

Unfortunately, load_elf_ binary() does not take account of the need to
allocate sufficient space for the entire binary which means that, while
the first PT_LOAD segment is mapped below mm->mmap_base, the subsequent
PT_LOAD segment(s) end up being mapped above mm->mmap_base into the are
that is supposed to be the "gap" between the stack and the binary.

Since the size of the "gap" on x86_64 is only guaranteed to be 128MB this
means that binaries with large data segments > 128MB can end up mapping
part of their data segment over their stack resulting in corruption of the
stack (and the data segment once the binary starts to run).

Any PIE binary with a data segment > 128MB is vulnerable to this although
address randomization means that the actual gap between the stack and the
end of the binary is normally greater than 128MB.  The larger the data
segment of the binary the higher the probability of failure.

Fix this by calculating the total size of the binary in the same way as
load_elf_interp().

Signed-off-by: Michael Davidson <md@google.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/binfmt_elf.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index c757a131bb4a..ec6d0de19694 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -754,6 +754,7 @@ static int load_elf_binary(struct linux_binprm *bprm)
 	    i < loc->elf_ex.e_phnum; i++, elf_ppnt++) {
 		int elf_prot = 0, elf_flags;
 		unsigned long k, vaddr;
+		unsigned long total_size = 0;
 
 		if (elf_ppnt->p_type != PT_LOAD)
 			continue;
@@ -818,10 +819,16 @@ static int load_elf_binary(struct linux_binprm *bprm)
 #else
 			load_bias = ELF_PAGESTART(ELF_ET_DYN_BASE - vaddr);
 #endif
+			total_size = total_mapping_size(elf_phdata,
+							loc->elf_ex.e_phnum);
+			if (!total_size) {
+				error = -EINVAL;
+				goto out_free_dentry;
+			}
 		}
 
 		error = elf_map(bprm->file, load_bias + vaddr, elf_ppnt,
-				elf_prot, elf_flags, 0);
+				elf_prot, elf_flags, total_size);
 		if (BAD_ADDR(error)) {
 			send_sig(SIGKILL, current, 0);
 			retval = IS_ERR((void *)error) ?
-- 
2.3.7

[PATCH 3.12 042/142] ptrace: fix race between ptrace_resume() and wait_task_stopped()

[Jiri Slaby]

From: Oleg Nesterov <oleg@redhat.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit b72c186999e689cb0b055ab1c7b3cd8fffbeb5ed upstream.

ptrace_resume() is called when the tracee is still __TASK_TRACED.  We set
tracee->exit_code and then wake_up_state() changes tracee->state.  If the
tracer's sub-thread does wait() in between, task_stopped_code(ptrace => T)
wrongly looks like another report from tracee.

This confuses debugger, and since wait_task_stopped() clears ->exit_code
the tracee can miss a signal.

Test-case:

	#include <stdio.h>
	#include <unistd.h>
	#include <sys/wait.h>
	#include <sys/ptrace.h>
	#include <pthread.h>
	#include <assert.h>

	int pid;

	void *waiter(void *arg)
	{
		int stat;

		for (;;) {
			assert(pid == wait(&stat));
			assert(WIFSTOPPED(stat));
			if (WSTOPSIG(stat) == SIGHUP)
				continue;

			assert(WSTOPSIG(stat) == SIGCONT);
			printf("ERR! extra/wrong report:%x\n", stat);
		}
	}

	int main(void)
	{
		pthread_t thread;

		pid = fork();
		if (!pid) {
			assert(ptrace(PTRACE_TRACEME, 0,0,0) == 0);
			for (;;)
				kill(getpid(), SIGHUP);
		}

		assert(pthread_create(&thread, NULL, waiter, NULL) == 0);

		for (;;)
			ptrace(PTRACE_CONT, pid, 0, SIGCONT);

		return 0;
	}

Note for stable: the bug is very old, but without 9899d11f6544 "ptrace:
ensure arch_ptrace/ptrace_request can never race with SIGKILL" the fix
should use lock_task_sighand(child).

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Pavel Labath <labath@google.com>
Tested-by: Pavel Labath <labath@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 kernel/ptrace.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 1f4bcb3cc21c..be9760f8284a 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -720,6 +720,8 @@ static int ptrace_peek_siginfo(struct task_struct *child,
 static int ptrace_resume(struct task_struct *child, long request,
 			 unsigned long data)
 {
+	bool need_siglock;
+
 	if (!valid_signal(data))
 		return -EIO;
 
@@ -747,8 +749,26 @@ static int ptrace_resume(struct task_struct *child, long request,
 		user_disable_single_step(child);
 	}
 
+	/*
+	 * Change ->exit_code and ->state under siglock to avoid the race
+	 * with wait_task_stopped() in between; a non-zero ->exit_code will
+	 * wrongly look like another report from tracee.
+	 *
+	 * Note that we need siglock even if ->exit_code == data and/or this
+	 * status was not reported yet, the new status must not be cleared by
+	 * wait_task_stopped() after resume.
+	 *
+	 * If data == 0 we do not care if wait_task_stopped() reports the old
+	 * status and clears the code too; this can't race with the tracee, it
+	 * takes siglock after resume.
+	 */
+	need_siglock = data && !thread_group_empty(current);
+	if (need_siglock)
+		spin_lock_irq(&child->sighand->siglock);
 	child->exit_code = data;
 	wake_up_state(child, __TASK_TRACED);
+	if (need_siglock)
+		spin_unlock_irq(&child->sighand->siglock);
 
 	return 0;
 }
-- 
2.3.7

[PATCH 3.12 043/142] rtlwifi: rtl8192cu: Add new USB ID

[Jiri Slaby]

From: Larry Finger <Larry.Finger@lwfinger.net>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 2f92b314f4daff2117847ac5343c54d3d041bf78 upstream.

USB ID 2001:330d is used for a D-Link DWA-131.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/net/wireless/rtlwifi/rtl8192cu/sw.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
index e7a2af3ad05a..8cf0d3919b98 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
@@ -369,6 +369,7 @@ static struct usb_device_id rtl8192c_usb_ids[] = {
 	{RTL_USB_DEVICE(0x2001, 0x3307, rtl92cu_hal_cfg)}, /*D-Link-Cameo*/
 	{RTL_USB_DEVICE(0x2001, 0x3309, rtl92cu_hal_cfg)}, /*D-Link-Alpha*/
 	{RTL_USB_DEVICE(0x2001, 0x330a, rtl92cu_hal_cfg)}, /*D-Link-Alpha*/
+	{RTL_USB_DEVICE(0x2001, 0x330d, rtl92cu_hal_cfg)}, /*D-Link DWA-131 */
 	{RTL_USB_DEVICE(0x2019, 0xab2b, rtl92cu_hal_cfg)}, /*Planex -Abocom*/
 	{RTL_USB_DEVICE(0x20f4, 0x624d, rtl92cu_hal_cfg)}, /*TRENDNet*/
 	{RTL_USB_DEVICE(0x2357, 0x0100, rtl92cu_hal_cfg)}, /*TP-Link WN8200ND*/
-- 
2.3.7

[PATCH 3.12 044/142] rtlwifi: rtl8192cu: Add new device ID

[Jiri Slaby]

From: Marek Vasut <marex@denx.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 9374e7d2fdcad3c36dafc8d3effd554bc702c4b6 upstream.

Add new ID for ASUS N10 WiFi dongle.

Signed-off-by: Marek Vasut <marex@denx.de>
Tested-by: Marek Vasut <marex@denx.de>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Cc: John W. Linville <linville@tuxdriver.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/net/wireless/rtlwifi/rtl8192cu/sw.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
index 8cf0d3919b98..7555095e0b74 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
@@ -313,6 +313,7 @@ static struct usb_device_id rtl8192c_usb_ids[] = {
 	{RTL_USB_DEVICE(0x07b8, 0x8188, rtl92cu_hal_cfg)}, /*Abocom - Abocom*/
 	{RTL_USB_DEVICE(0x07b8, 0x8189, rtl92cu_hal_cfg)}, /*Funai - Abocom*/
 	{RTL_USB_DEVICE(0x0846, 0x9041, rtl92cu_hal_cfg)}, /*NetGear WNA1000M*/
+	{RTL_USB_DEVICE(0x0b05, 0x17ba, rtl92cu_hal_cfg)}, /*ASUS-Edimax*/
 	{RTL_USB_DEVICE(0x0bda, 0x5088, rtl92cu_hal_cfg)}, /*Thinkware-CC&C*/
 	{RTL_USB_DEVICE(0x0df6, 0x0052, rtl92cu_hal_cfg)}, /*Sitecom - Edimax*/
 	{RTL_USB_DEVICE(0x0df6, 0x005c, rtl92cu_hal_cfg)}, /*Sitecom - Edimax*/
-- 
2.3.7

[PATCH 3.12 045/142] arm64: vdso: fix build error when switching from LE to BE

[Jiri Slaby]

From: Arun Chandran <achandran@mvista.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 1915e2ad1cf548217c963121e4076b3d44dd0169 upstream.

Building a kernel with CPU_BIG_ENDIAN fails if there are stale objects
from a !CPU_BIG_ENDIAN build. Due to a missing FORCE prerequisite on an
if_changed rule in the VDSO Makefile, we attempt to link a stale LE
object into the new BE kernel.

According to Documentation/kbuild/makefiles.txt, FORCE is required for
if_changed rules and forgetting it is a common mistake, so fix it by
'Forcing' the build of vdso. This patch fixes build errors like these:

arch/arm64/kernel/vdso/note.o: compiled for a little endian system and target is big endian
failed to merge target specific data of file arch/arm64/kernel/vdso/note.o

arch/arm64/kernel/vdso/sigreturn.o: compiled for a little endian system and target is big endian
failed to merge target specific data of file arch/arm64/kernel/vdso/sigreturn.o

Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Arun Chandran <achandran@mvista.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm64/kernel/vdso/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile
index 6d20b7d162d8..a268a9af0c2d 100644
--- a/arch/arm64/kernel/vdso/Makefile
+++ b/arch/arm64/kernel/vdso/Makefile
@@ -43,7 +43,7 @@ $(obj)/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE
 	$(call if_changed,vdsosym)
 
 # Assembly rules for the .S files
-$(obj-vdso): %.o: %.S
+$(obj-vdso): %.o: %.S FORCE
 	$(call if_changed_dep,vdsoas)
 
 # Actual build commands
-- 
2.3.7

[PATCH 3.12 046/142] ext4: make fsync to sync parent dir in no-journal for real this time

[Jiri Slaby]

From: Lukas Czerner <lczerner@redhat.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit e12fb97222fc41e8442896934f76d39ef99b590a upstream.

Previously commit 14ece1028b3ed53ffec1b1213ffc6acaf79ad77c added a
support for for syncing parent directory of newly created inodes to
make sure that the inode is not lost after a power failure in
no-journal mode.

However this does not work in majority of cases, namely:
 - if the directory has inline data
 - if the directory is already indexed
 - if the directory already has at least one block and:
	- the new entry fits into it
	- or we've successfully converted it to indexed

So in those cases we might lose the inode entirely even after fsync in
the no-journal mode. This also includes ext2 default mode obviously.

I've noticed this while running xfstest generic/321 and even though the
test should fail (we need to run fsck after a crash in no-journal mode)
I could not find a newly created entries even when if it was fsynced
before.

Fix this by adjusting the ext4_add_entry() successful exit paths to set
the inode EXT4_STATE_NEWENTRY so that fsync has the chance to fsync the
parent directory as well.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Frank Mayhar <fmayhar@google.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/ext4/namei.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 7e6954cbcef7..4587a1b31c93 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1870,7 +1870,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
 			  struct inode *inode)
 {
 	struct inode *dir = dentry->d_parent->d_inode;
-	struct buffer_head *bh;
+	struct buffer_head *bh = NULL;
 	struct ext4_dir_entry_2 *de;
 	struct ext4_dir_entry_tail *t;
 	struct super_block *sb;
@@ -1894,14 +1894,14 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
 			return retval;
 		if (retval == 1) {
 			retval = 0;
-			return retval;
+			goto out;
 		}
 	}
 
 	if (is_dx(dir)) {
 		retval = ext4_dx_add_entry(handle, dentry, inode);
 		if (!retval || (retval != ERR_BAD_DX_DIR))
-			return retval;
+			goto out;
 		ext4_clear_inode_flag(dir, EXT4_INODE_INDEX);
 		dx_fallback++;
 		ext4_mark_inode_dirty(handle, dir);
@@ -1913,14 +1913,15 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
 			return PTR_ERR(bh);
 
 		retval = add_dirent_to_buf(handle, dentry, inode, NULL, bh);
-		if (retval != -ENOSPC) {
-			brelse(bh);
-			return retval;
-		}
+		if (retval != -ENOSPC)
+			goto out;
 
 		if (blocks == 1 && !dx_fallback &&
-		    EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX))
-			return make_indexed_dir(handle, dentry, inode, bh);
+		    EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) {
+			retval = make_indexed_dir(handle, dentry, inode, bh);
+			bh = NULL; /* make_indexed_dir releases bh */
+			goto out;
+		}
 		brelse(bh);
 	}
 	bh = ext4_append(handle, dir, &block);
@@ -1936,6 +1937,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
 	}
 
 	retval = add_dirent_to_buf(handle, dentry, inode, de, bh);
+out:
 	brelse(bh);
 	if (retval == 0)
 		ext4_set_inode_state(inode, EXT4_STATE_NEWENTRY);
-- 
2.3.7

[PATCH 3.12 047/142] powerpc/perf: Cap 64bit userspace backtraces to PERF_MAX_STACK_DEPTH

[Jiri Slaby]

From: Anton Blanchard <anton@samba.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 9a5cbce421a283e6aea3c4007f141735bf9da8c3 upstream.

We cap 32bit userspace backtraces to PERF_MAX_STACK_DEPTH
(currently 127), but we forgot to do the same for 64bit backtraces.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/powerpc/perf/callchain.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/perf/callchain.c b/arch/powerpc/perf/callchain.c
index 2396dda282cd..ead55351b254 100644
--- a/arch/powerpc/perf/callchain.c
+++ b/arch/powerpc/perf/callchain.c
@@ -243,7 +243,7 @@ static void perf_callchain_user_64(struct perf_callchain_entry *entry,
 	sp = regs->gpr[1];
 	perf_callchain_store(entry, next_ip);
 
-	for (;;) {
+	while (entry->nr < PERF_MAX_STACK_DEPTH) {
 		fp = (unsigned long __user *) sp;
 		if (!valid_user_sp(sp, 1) || read_user_stack_64(fp, &next_sp))
 			return;
-- 
2.3.7

[PATCH 3.12 048/142] tools lib traceevent kbuffer: Remove extra update to data pointer in PADDING

[Jiri Slaby]

From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit c5e691928bf166ac03430e957038b60adba3cf6c upstream.

When a event PADDING is hit (a deleted event that is still in the ring
buffer), translate_data() sets the length of the padding and also updates
the data pointer which is passed back to the caller.

This is unneeded because the caller also updates the data pointer with
the passed back length. translate_data() should not update the pointer,
only set the length.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20150324135923.461431960@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 tools/lib/traceevent/kbuffer-parse.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tools/lib/traceevent/kbuffer-parse.c b/tools/lib/traceevent/kbuffer-parse.c
index dcc665228c71..deb3569ab004 100644
--- a/tools/lib/traceevent/kbuffer-parse.c
+++ b/tools/lib/traceevent/kbuffer-parse.c
@@ -372,7 +372,6 @@ translate_data(struct kbuffer *kbuf, void *data, void **rptr,
 	switch (type_len) {
 	case KBUFFER_TYPE_PADDING:
 		*length = read_4(kbuf, data);
-		data += *length;
 		break;
 
 	case KBUFFER_TYPE_TIME_EXTEND:
-- 
2.3.7

[PATCH 3.12 049/142] tools/power turbostat: Use $(CURDIR) instead of $(PWD) and add support for O= option in Makefile

[Jiri Slaby]

From: Thomas D <whissi@whissi.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit f82263c6989c31ae9b94cecddffb29dcbec38710 upstream.

Since commit ee0778a30153
("tools/power: turbostat: make Makefile a bit more capable")
turbostat's Makefile is using

  [...]
  BUILD_OUTPUT    := $(PWD)
  [...]

which obviously causes trouble when building "turbostat" with

  make -C /usr/src/linux/tools/power/x86/turbostat ARCH=x86 turbostat

because GNU make does not update nor guarantee that $PWD is set.

This patch changes the Makefile to use $CURDIR instead, which GNU make
guarantees to set and update (i.e. when using "make -C ...") and also
adds support for the O= option (see "make help" in your root of your
kernel source tree for more details).

Link: https://bugs.gentoo.org/show_bug.cgi?id=533918
Fixes: ee0778a30153 ("tools/power: turbostat: make Makefile a bit more capable")
Signed-off-by: Thomas D. <whissi@whissi.de>
Cc: Mark Asselstine <mark.asselstine@windriver.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 tools/power/x86/turbostat/Makefile | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/power/x86/turbostat/Makefile b/tools/power/x86/turbostat/Makefile
index d1b3a361e526..4039854560d0 100644
--- a/tools/power/x86/turbostat/Makefile
+++ b/tools/power/x86/turbostat/Makefile
@@ -1,8 +1,12 @@
 CC		= $(CROSS_COMPILE)gcc
-BUILD_OUTPUT	:= $(PWD)
+BUILD_OUTPUT	:= $(CURDIR)
 PREFIX		:= /usr
 DESTDIR		:=
 
+ifeq ("$(origin O)", "command line")
+	BUILD_OUTPUT := $(O)
+endif
+
 turbostat : turbostat.c
 CFLAGS +=	-Wall
 CFLAGS +=	-DMSRHEADER='"../../../../arch/x86/include/uapi/asm/msr-index.h"'
-- 
2.3.7

[PATCH 3.12 050/142] UBI: account for bitflips in both the VID header and data

[Jiri Slaby]

From: Brian Norris <computersforpeace@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 8eef7d70f7c6772c3490f410ee2bceab3b543fa1 upstream.

We are completely discarding the earlier value of 'bitflips', which
could reflect a bitflip found in ubi_io_read_vid_hdr(). Let's use the
bitwise OR of header and data 'bitflip' statuses instead.

Coverity CID #1226856

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/mtd/ubi/attach.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c
index c071d410488f..79d69bd26dd2 100644
--- a/drivers/mtd/ubi/attach.c
+++ b/drivers/mtd/ubi/attach.c
@@ -408,7 +408,7 @@ int ubi_compare_lebs(struct ubi_device *ubi, const struct ubi_ainf_peb *aeb,
 		second_is_newer = !second_is_newer;
 	} else {
 		dbg_bld("PEB %d CRC is OK", pnum);
-		bitflips = !!err;
+		bitflips |= !!err;
 	}
 	mutex_unlock(&ubi->buf_mutex);
 
-- 
2.3.7

[PATCH 3.12 051/142] UBI: fix out of bounds write

[Jiri Slaby]

From: Brian Norris <computersforpeace@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit d74adbdb9abf0d2506a6c4afa534d894f28b763f upstream.

If aeb->len >= vol->reserved_pebs, we should not be writing aeb into the
PEB->LEB mapping.

Caught by Coverity, CID #711212.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/mtd/ubi/eba.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index 0e11671dadc4..930cf2c77abb 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -1362,7 +1362,8 @@ int ubi_eba_init(struct ubi_device *ubi, struct ubi_attach_info *ai)
 				 * during re-size.
 				 */
 				ubi_move_aeb_to_list(av, aeb, &ai->erase);
-			vol->eba_tbl[aeb->lnum] = aeb->pnum;
+			else
+				vol->eba_tbl[aeb->lnum] = aeb->pnum;
 		}
 	}
 
-- 
2.3.7

[PATCH 3.12 052/142] UBI: initialize LEB number variable

[Jiri Slaby]

From: Brian Norris <computersforpeace@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit f16db8071ce18819fbd705ddcc91c6f392fb61f8 upstream.

In some of the 'out_not_moved' error paths, lnum may be used
uninitialized. Don't ignore the warning; let's fix it.

This uninitialized variable doesn't have much visible effect in the end,
since we just schedule the PEB for erasure, and its LEB number doesn't
really matter (it just gets printed in debug messages). But let's get it
straight anyway.

Coverity CID #113449

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/mtd/ubi/wl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index 49e570abe58b..c08254016fe8 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -999,7 +999,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
 				int cancel)
 {
 	int err, scrubbing = 0, torture = 0, protect = 0, erroneous = 0;
-	int vol_id = -1, uninitialized_var(lnum);
+	int vol_id = -1, lnum = -1;
 #ifdef CONFIG_MTD_UBI_FASTMAP
 	int anchor = wrk->anchor;
 #endif
-- 
2.3.7

[PATCH 3.12 053/142] UBI: fix check for "too many bytes"

[Jiri Slaby]

From: Brian Norris <computersforpeace@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 299d0c5b27346a77a0777c993372bf8777d4f2e5 upstream.

The comparison from the previous line seems to have been erroneously
(partially) copied-and-pasted onto the next. The second line should be
checking req.bytes, not req.lnum.

Coverity CID #139400

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
[rw: Fixed comparison]
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/mtd/ubi/cdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index 8ca49f2043e4..4cbbd5531133 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -451,7 +451,7 @@ static long vol_cdev_ioctl(struct file *file, unsigned int cmd,
 		/* Validate the request */
 		err = -EINVAL;
 		if (req.lnum < 0 || req.lnum >= vol->reserved_pebs ||
-		    req.bytes < 0 || req.lnum >= vol->usable_leb_size)
+		    req.bytes < 0 || req.bytes > vol->usable_leb_size)
 			break;
 
 		err = get_exclusive(desc);
-- 
2.3.7

[PATCH 3.12 054/142] scsi: storvsc: Fix a bug in copy_from_bounce_buffer()

[Jiri Slaby]

From: "K. Y. Srinivasan" <kys@microsoft.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 8de580742fee8bc34d116f57a20b22b9a5f08403 upstream.

We may exit this function without properly freeing up the maapings
we may have acquired. Fix the bug.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Long Li <longli@microsoft.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/scsi/storvsc_drv.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 86b05151fdab..97892f258043 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -739,21 +739,22 @@ static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl,
 			if (bounce_sgl[j].length == PAGE_SIZE) {
 				/* full..move to next entry */
 				sg_kunmap_atomic(bounce_addr);
+				bounce_addr = 0;
 				j++;
+			}
 
-				/* if we need to use another bounce buffer */
-				if (srclen || i != orig_sgl_count - 1)
-					bounce_addr = sg_kmap_atomic(bounce_sgl,j);
+			/* if we need to use another bounce buffer */
+			if (srclen && bounce_addr == 0)
+				bounce_addr = sg_kmap_atomic(bounce_sgl, j);
 
-			} else if (srclen == 0 && i == orig_sgl_count - 1) {
-				/* unmap the last bounce that is < PAGE_SIZE */
-				sg_kunmap_atomic(bounce_addr);
-			}
 		}
 
 		sg_kunmap_atomic(src_addr - orig_sgl[i].offset);
 	}
 
+	if (bounce_addr)
+		sg_kunmap_atomic(bounce_addr);
+
 	local_irq_restore(flags);
 
 	return total_copied;
-- 
2.3.7

[PATCH 3.12 055/142] target: Fix COMPARE_AND_WRITE with SG_TO_MEM_NOALLOC handling

[Jiri Slaby]

From: Nicholas Bellinger <nab@linux-iscsi.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit c8e639852ad720499912acedfd6b072325fd2807 upstream.

This patch fixes a bug for COMPARE_AND_WRITE handling with
fabrics using SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC.

It adds the missing allocation for cmd->t_bidi_data_sg within
transport_generic_new_cmd() that is used by COMPARE_AND_WRITE
for the initial READ payload, even if the fabric is already
providing a pre-allocated buffer for cmd->t_data_sg.

Also, fix zero-length COMPARE_AND_WRITE handling within the
compare_and_write_callback() and target_complete_ok_work()
to queue the response, skipping the initial READ.

This fixes COMPARE_AND_WRITE emulation with loopback, vhost,
and xen-backend fabric drivers using SG_TO_MEM_NOALLOC.

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/target/target_core_sbc.c       | 15 +++++++++-----
 drivers/target/target_core_transport.c | 37 ++++++++++++++++++++++++++++++----
 include/target/target_core_base.h      |  2 +-
 3 files changed, 44 insertions(+), 10 deletions(-)

diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 63d56cda2b96..75f126538a72 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -298,7 +298,7 @@ sbc_setup_write_same(struct se_cmd *cmd, unsigned char *flags, struct sbc_ops *o
 	return 0;
 }
 
-static sense_reason_t xdreadwrite_callback(struct se_cmd *cmd)
+static sense_reason_t xdreadwrite_callback(struct se_cmd *cmd, bool success)
 {
 	unsigned char *buf, *addr;
 	struct scatterlist *sg;
@@ -362,7 +362,7 @@ sbc_execute_rw(struct se_cmd *cmd)
 			       cmd->data_direction);
 }
 
-static sense_reason_t compare_and_write_post(struct se_cmd *cmd)
+static sense_reason_t compare_and_write_post(struct se_cmd *cmd, bool success)
 {
 	struct se_device *dev = cmd->se_dev;
 
@@ -385,7 +385,7 @@ static sense_reason_t compare_and_write_post(struct se_cmd *cmd)
 	return TCM_NO_SENSE;
 }
 
-static sense_reason_t compare_and_write_callback(struct se_cmd *cmd)
+static sense_reason_t compare_and_write_callback(struct se_cmd *cmd, bool success)
 {
 	struct se_device *dev = cmd->se_dev;
 	struct scatterlist *write_sg = NULL, *sg;
@@ -400,11 +400,16 @@ static sense_reason_t compare_and_write_callback(struct se_cmd *cmd)
 
 	/*
 	 * Handle early failure in transport_generic_request_failure(),
-	 * which will not have taken ->caw_mutex yet..
+	 * which will not have taken ->caw_sem yet..
 	 */
-	if (!cmd->t_data_sg || !cmd->t_bidi_data_sg)
+	if (!success && (!cmd->t_data_sg || !cmd->t_bidi_data_sg))
 		return TCM_NO_SENSE;
 	/*
+	 * Handle special case for zero-length COMPARE_AND_WRITE
+	 */
+	if (!cmd->data_length)
+		goto out;
+	/*
 	 * Immediately exit + release dev->caw_sem if command has already
 	 * been failed with a non-zero SCSI status.
 	 */
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 65ecaa1c59a7..b52bf3cad494 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1589,11 +1589,11 @@ void transport_generic_request_failure(struct se_cmd *cmd,
 	transport_complete_task_attr(cmd);
 	/*
 	 * Handle special case for COMPARE_AND_WRITE failure, where the
-	 * callback is expected to drop the per device ->caw_mutex.
+	 * callback is expected to drop the per device ->caw_sem.
 	 */
 	if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) &&
 	     cmd->transport_complete_callback)
-		cmd->transport_complete_callback(cmd);
+		cmd->transport_complete_callback(cmd, false);
 
 	switch (sense_reason) {
 	case TCM_NON_EXISTENT_LUN:
@@ -1942,8 +1942,12 @@ static void target_complete_ok_work(struct work_struct *work)
 	if (cmd->transport_complete_callback) {
 		sense_reason_t rc;
 
-		rc = cmd->transport_complete_callback(cmd);
+		rc = cmd->transport_complete_callback(cmd, true);
 		if (!rc && !(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE_POST)) {
+			if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) &&
+			    !cmd->data_length)
+				goto queue_rsp;
+
 			return;
 		} else if (rc) {
 			ret = transport_send_check_condition_and_sense(cmd,
@@ -1957,6 +1961,7 @@ static void target_complete_ok_work(struct work_struct *work)
 		}
 	}
 
+queue_rsp:
 	switch (cmd->data_direction) {
 	case DMA_FROM_DEVICE:
 		spin_lock(&cmd->se_lun->lun_sep_lock);
@@ -2045,6 +2050,16 @@ static inline void transport_reset_sgl_orig(struct se_cmd *cmd)
 static inline void transport_free_pages(struct se_cmd *cmd)
 {
 	if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) {
+		/*
+		 * Release special case READ buffer payload required for
+		 * SG_TO_MEM_NOALLOC to function with COMPARE_AND_WRITE
+		 */
+		if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) {
+			transport_free_sgl(cmd->t_bidi_data_sg,
+					   cmd->t_bidi_data_nents);
+			cmd->t_bidi_data_sg = NULL;
+			cmd->t_bidi_data_nents = 0;
+		}
 		transport_reset_sgl_orig(cmd);
 		return;
 	}
@@ -2193,6 +2208,7 @@ sense_reason_t
 transport_generic_new_cmd(struct se_cmd *cmd)
 {
 	int ret = 0;
+	bool zero_flag = !(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB);
 
 	/*
 	 * Determine is the TCM fabric module has already allocated physical
@@ -2201,7 +2217,6 @@ transport_generic_new_cmd(struct se_cmd *cmd)
 	 */
 	if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) &&
 	    cmd->data_length) {
-		bool zero_flag = !(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB);
 
 		if ((cmd->se_cmd_flags & SCF_BIDI) ||
 		    (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)) {
@@ -2224,6 +2239,20 @@ transport_generic_new_cmd(struct se_cmd *cmd)
 				       cmd->data_length, zero_flag);
 		if (ret < 0)
 			return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+	} else if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) &&
+		    cmd->data_length) {
+		/*
+		 * Special case for COMPARE_AND_WRITE with fabrics
+		 * using SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC.
+		 */
+		u32 caw_length = cmd->t_task_nolb *
+				 cmd->se_dev->dev_attrib.block_size;
+
+		ret = target_alloc_sgl(&cmd->t_bidi_data_sg,
+				       &cmd->t_bidi_data_nents,
+				       caw_length, zero_flag);
+		if (ret < 0)
+			return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 	/*
 	 * If this command is not a write we can execute it right here,
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 38647a3441c9..085e6bedf393 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -457,7 +457,7 @@ struct se_cmd {
 	sense_reason_t		(*execute_cmd)(struct se_cmd *);
 	sense_reason_t		(*execute_rw)(struct se_cmd *, struct scatterlist *,
 					      u32, enum dma_data_direction);
-	sense_reason_t (*transport_complete_callback)(struct se_cmd *);
+	sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool);
 
 	unsigned char		*t_task_cdb;
 	unsigned char		__t_task_cdb[TCM_MAX_COMMAND_SIZE];
-- 
2.3.7

[PATCH 3.12 056/142] Bluetooth: ath3k: Add support Atheros AR5B195 combo Mini PCIe card

[Jiri Slaby]

From: Alexander Ploumistos <alex.ploumistos@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 2eeff0b4317a02f0e281df891d990194f0737aae upstream.

Add 04f2:aff1 to ath3k.c supported devices list and btusb.c blacklist, so
that the device can load the ath3k firmware and re-enumerate itself as an
AR3011 device.

T:  Bus=05 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=04f2 ProdID=aff1 Rev= 0.01
C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
I:  If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
I:  If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  33 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  33 Ivl=1ms
I:  If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  49 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  49 Ivl=1ms

Signed-off-by: Alexander Ploumistos <alexpl@fedoraproject.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/bluetooth/ath3k.c | 1 +
 drivers/bluetooth/btusb.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/bluetooth/ath3k.c b/drivers/bluetooth/ath3k.c
index e0894227c302..0e3978496339 100644
--- a/drivers/bluetooth/ath3k.c
+++ b/drivers/bluetooth/ath3k.c
@@ -65,6 +65,7 @@ static struct usb_device_id ath3k_table[] = {
 	/* Atheros AR3011 with sflash firmware*/
 	{ USB_DEVICE(0x0489, 0xE027) },
 	{ USB_DEVICE(0x0489, 0xE03D) },
+	{ USB_DEVICE(0x04F2, 0xAFF1) },
 	{ USB_DEVICE(0x0930, 0x0215) },
 	{ USB_DEVICE(0x0CF3, 0x3002) },
 	{ USB_DEVICE(0x0CF3, 0xE019) },
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 042f6dccc399..070913737f44 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -142,6 +142,7 @@ static struct usb_device_id blacklist_table[] = {
 	/* Atheros 3011 with sflash firmware */
 	{ USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
 	{ USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
+	{ USB_DEVICE(0x04f2, 0xaff1), .driver_info = BTUSB_IGNORE },
 	{ USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
 	{ USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
 	{ USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
-- 
2.3.7

[PATCH 3.12 057/142] powerpc: Fix missing L2 cache size in /sys/devices/system/cpu

[Jiri Slaby]

From: Dave Olson <olson@cumulusnetworks.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit f7e9e358362557c3aa2c1ec47490f29fe880a09e upstream.

This problem appears to have been introduced in 2.6.29 by commit
93197a36a9c1 "Rewrite sysfs processor cache info code".

This caused lscpu to error out on at least e500v2 devices, eg:

  error: cannot open /sys/devices/system/cpu/cpu0/cache/index2/size: No such file or directory

Some embedded powerpc systems use cache-size in DTS for the unified L2
cache size, not d-cache-size, so we need to allow for both DTS names.
Added a new CACHE_TYPE_UNIFIED_D cache_type_info structure to handle
this.

Fixes: 93197a36a9c1 ("powerpc: Rewrite sysfs processor cache info code")
Signed-off-by: Dave Olson <olson@cumulusnetworks.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/powerpc/kernel/cacheinfo.c | 44 +++++++++++++++++++++++++++++++----------
 1 file changed, 34 insertions(+), 10 deletions(-)

diff --git a/arch/powerpc/kernel/cacheinfo.c b/arch/powerpc/kernel/cacheinfo.c
index bfb82365bc7a..c26b9355156a 100644
--- a/arch/powerpc/kernel/cacheinfo.c
+++ b/arch/powerpc/kernel/cacheinfo.c
@@ -62,12 +62,22 @@ struct cache_type_info {
 };
 
 /* These are used to index the cache_type_info array. */
-#define CACHE_TYPE_UNIFIED     0
-#define CACHE_TYPE_INSTRUCTION 1
-#define CACHE_TYPE_DATA        2
+#define CACHE_TYPE_UNIFIED     0 /* cache-size, cache-block-size, etc. */
+#define CACHE_TYPE_UNIFIED_D   1 /* d-cache-size, d-cache-block-size, etc */
+#define CACHE_TYPE_INSTRUCTION 2
+#define CACHE_TYPE_DATA        3
 
 static const struct cache_type_info cache_type_info[] = {
 	{
+		/* Embedded systems that use cache-size, cache-block-size,
+		 * etc. for the Unified (typically L2) cache. */
+		.name            = "Unified",
+		.size_prop       = "cache-size",
+		.line_size_props = { "cache-line-size",
+				     "cache-block-size", },
+		.nr_sets_prop    = "cache-sets",
+	},
+	{
 		/* PowerPC Processor binding says the [di]-cache-*
 		 * must be equal on unified caches, so just use
 		 * d-cache properties. */
@@ -294,7 +304,8 @@ static struct cache *cache_find_first_sibling(struct cache *cache)
 {
 	struct cache *iter;
 
-	if (cache->type == CACHE_TYPE_UNIFIED)
+	if (cache->type == CACHE_TYPE_UNIFIED ||
+	    cache->type == CACHE_TYPE_UNIFIED_D)
 		return cache;
 
 	list_for_each_entry(iter, &cache_list, list)
@@ -325,16 +336,29 @@ static bool cache_node_is_unified(const struct device_node *np)
 	return of_get_property(np, "cache-unified", NULL);
 }
 
-static struct cache *cache_do_one_devnode_unified(struct device_node *node,
-						  int level)
+/*
+ * Unified caches can have two different sets of tags.  Most embedded
+ * use cache-size, etc. for the unified cache size, but open firmware systems
+ * use d-cache-size, etc.   Check on initialization for which type we have, and
+ * return the appropriate structure type.  Assume it's embedded if it isn't
+ * open firmware.  If it's yet a 3rd type, then there will be missing entries
+ * in /sys/devices/system/cpu/cpu0/cache/index2/, and this code will need
+ * to be extended further.
+ */
+static int cache_is_unified_d(const struct device_node *np)
 {
-	struct cache *cache;
+	return of_get_property(np,
+		cache_type_info[CACHE_TYPE_UNIFIED_D].size_prop, NULL) ?
+		CACHE_TYPE_UNIFIED_D : CACHE_TYPE_UNIFIED;
+}
 
+/*
+ */
+static struct cache *cache_do_one_devnode_unified(struct device_node *node, int level)
+{
 	pr_debug("creating L%d ucache for %s\n", level, node->full_name);
 
-	cache = new_cache(CACHE_TYPE_UNIFIED, level, node);
-
-	return cache;
+	return new_cache(cache_is_unified_d(node), level, node);
 }
 
 static struct cache *cache_do_one_devnode_split(struct device_node *node,
-- 
2.3.7

[PATCH 3.12 058/142] ACPICA: Utilities: split IO address types from data type models.

[Jiri Slaby]

From: Lv Zheng <lv.zheng@intel.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 2b8760100e1de69b6ff004c986328a82947db4ad upstream.

ACPICA commit aacf863cfffd46338e268b7415f7435cae93b451

It is reported that on a physically 64-bit addressed machine, 32-bit kernel
can trigger crashes in accessing the memory regions that are beyond the
32-bit boundary. The region field's start address should still be 32-bit
compliant, but after a calculation (adding some offsets), it may exceed the
32-bit boundary. This case is rare and buggy, but there are real BIOSes
leaked with such issues (see References below).

This patch fixes this gap by always defining IO addresses as 64-bit, and
allows OSPMs to optimize it for a real 32-bit machine to reduce the size of
the internal objects.

Internal acpi_physical_address usages in the structures that can be fixed
by this change include:
 1. struct acpi_object_region:
    acpi_physical_address		address;
 2. struct acpi_address_range:
    acpi_physical_address		start_address;
    acpi_physical_address		end_address;
 3. struct acpi_mem_space_context;
    acpi_physical_address		address;
 4. struct acpi_table_desc
    acpi_physical_address		address;
See known issues 1 for other usages.

Note that acpi_io_address which is used for ACPI_PROCESSOR may also suffer
from same problem, so this patch changes it accordingly.

For iasl, it will enforce acpi_physical_address as 32-bit to generate
32-bit OSPM compatible tables on 32-bit platforms, we need to define
ACPI_32BIT_PHYSICAL_ADDRESS for it in acenv.h.

Known issues:
 1. Cleanup of mapped virtual address
   In struct acpi_mem_space_context, acpi_physical_address is used as a virtual
   address:
    acpi_physical_address                   mapped_physical_address;
   It is better to introduce acpi_virtual_address or use acpi_size instead.
   This patch doesn't make such a change. Because this should be done along
   with a change to acpi_os_map_memory()/acpi_os_unmap_memory().
   There should be no functional problem to leave this unchanged except
   that only this structure is enlarged unexpectedly.

Link: https://github.com/acpica/acpica/commit/aacf863c
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=87971
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=79501
Reported-and-tested-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reported-and-tested-by: Sial Nije <sialnije@gmail.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 include/acpi/actypes.h        | 20 ++++++++++++++++++++
 include/acpi/platform/acenv.h |  1 +
 2 files changed, 21 insertions(+)

diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index b748aefce929..3c36b091a2c4 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -198,9 +198,29 @@ typedef int INT32;
 typedef s32 acpi_native_int;
 
 typedef u32 acpi_size;
+
+#ifdef ACPI_32BIT_PHYSICAL_ADDRESS
+
+/*
+ * OSPMs can define this to shrink the size of the structures for 32-bit
+ * none PAE environment. ASL compiler may always define this to generate
+ * 32-bit OSPM compliant tables.
+ */
 typedef u32 acpi_io_address;
 typedef u32 acpi_physical_address;
 
+#else				/* ACPI_32BIT_PHYSICAL_ADDRESS */
+
+/*
+ * It is reported that, after some calculations, the physical addresses can
+ * wrap over the 32-bit boundary on 32-bit PAE environment.
+ * https://bugzilla.kernel.org/show_bug.cgi?id=87971
+ */
+typedef u64 acpi_io_address;
+typedef u64 acpi_physical_address;
+
+#endif				/* ACPI_32BIT_PHYSICAL_ADDRESS */
+
 #define ACPI_MAX_PTR                    ACPI_UINT32_MAX
 #define ACPI_SIZE_MAX                   ACPI_UINT32_MAX
 
diff --git a/include/acpi/platform/acenv.h b/include/acpi/platform/acenv.h
index ef04b36ca6ed..f7db107abb04 100644
--- a/include/acpi/platform/acenv.h
+++ b/include/acpi/platform/acenv.h
@@ -76,6 +76,7 @@
 #define ACPI_LARGE_NAMESPACE_NODE
 #define ACPI_DATA_TABLE_DISASSEMBLY
 #define ACPI_SINGLE_THREADED
+#define ACPI_32BIT_PHYSICAL_ADDRESS
 #endif
 
 /* acpi_exec configuration. Multithreaded with full AML debugger */
-- 
2.3.7

[PATCH 3.12 059/142] xtensa: xtfpga: fix hardware lockup caused by LCD driver

[Jiri Slaby]

From: Max Filippov <jcmvbkbc@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 4949009eb8d40a441dcddcd96e101e77d31cf1b2 upstream.

LCD driver is always built for the XTFPGA platform, but its base address
is not configurable, and is wrong for ML605/KC705. Its initialization
locks up KC705 board hardware.

Make the whole driver optional, and its base address and bus width
configurable. Implement 4-bit bus access method.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/xtensa/Kconfig                                | 30 ++++++++++++
 arch/xtensa/platforms/xtfpga/Makefile              |  3 +-
 .../platforms/xtfpga/include/platform/hardware.h   |  3 --
 .../xtensa/platforms/xtfpga/include/platform/lcd.h | 15 ++++++
 arch/xtensa/platforms/xtfpga/lcd.c                 | 55 +++++++++++++---------
 5 files changed, 81 insertions(+), 25 deletions(-)

diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 8d24dcb7cdac..3b8060e4f1d7 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -289,6 +289,36 @@ menu "Executable file formats"
 
 source "fs/Kconfig.binfmt"
 
+config XTFPGA_LCD
+	bool "Enable XTFPGA LCD driver"
+	depends on XTENSA_PLATFORM_XTFPGA
+	default n
+	help
+	  There's a 2x16 LCD on most of XTFPGA boards, kernel may output
+	  progress messages there during bootup/shutdown. It may be useful
+	  during board bringup.
+
+	  If unsure, say N.
+
+config XTFPGA_LCD_BASE_ADDR
+	hex "XTFPGA LCD base address"
+	depends on XTFPGA_LCD
+	default "0x0d0c0000"
+	help
+	  Base address of the LCD controller inside KIO region.
+	  Different boards from XTFPGA family have LCD controller at different
+	  addresses. Please consult prototyping user guide for your board for
+	  the correct address. Wrong address here may lead to hardware lockup.
+
+config XTFPGA_LCD_8BIT_ACCESS
+	bool "Use 8-bit access to XTFPGA LCD"
+	depends on XTFPGA_LCD
+	default n
+	help
+	  LCD may be connected with 4- or 8-bit interface, 8-bit access may
+	  only be used with 8-bit interface. Please consult prototyping user
+	  guide for your board for the correct interface width.
+
 endmenu
 
 source "net/Kconfig"
diff --git a/arch/xtensa/platforms/xtfpga/Makefile b/arch/xtensa/platforms/xtfpga/Makefile
index b9ae206340cd..7839d38b2337 100644
--- a/arch/xtensa/platforms/xtfpga/Makefile
+++ b/arch/xtensa/platforms/xtfpga/Makefile
@@ -6,4 +6,5 @@
 #
 # Note 2! The CFLAGS definitions are in the main makefile...
 
-obj-y			= setup.o lcd.o
+obj-y			+= setup.o
+obj-$(CONFIG_XTFPGA_LCD) += lcd.o
diff --git a/arch/xtensa/platforms/xtfpga/include/platform/hardware.h b/arch/xtensa/platforms/xtfpga/include/platform/hardware.h
index 4416773cbde5..b39fbcf5c611 100644
--- a/arch/xtensa/platforms/xtfpga/include/platform/hardware.h
+++ b/arch/xtensa/platforms/xtfpga/include/platform/hardware.h
@@ -44,9 +44,6 @@
 
 /* UART */
 #define DUART16552_PADDR	(XCHAL_KIO_PADDR + 0x0D050020)
-/* LCD instruction and data addresses. */
-#define LCD_INSTR_ADDR		((char *)IOADDR(0x0D040000))
-#define LCD_DATA_ADDR		((char *)IOADDR(0x0D040004))
 
 /* Misc. */
 #define XTFPGA_FPGAREGS_VADDR	IOADDR(0x0D020000)
diff --git a/arch/xtensa/platforms/xtfpga/include/platform/lcd.h b/arch/xtensa/platforms/xtfpga/include/platform/lcd.h
index 0e435645af5a..4c8541ed1139 100644
--- a/arch/xtensa/platforms/xtfpga/include/platform/lcd.h
+++ b/arch/xtensa/platforms/xtfpga/include/platform/lcd.h
@@ -11,10 +11,25 @@
 #ifndef __XTENSA_XTAVNET_LCD_H
 #define __XTENSA_XTAVNET_LCD_H
 
+#ifdef CONFIG_XTFPGA_LCD
 /* Display string STR at position POS on the LCD. */
 void lcd_disp_at_pos(char *str, unsigned char pos);
 
 /* Shift the contents of the LCD display left or right. */
 void lcd_shiftleft(void);
 void lcd_shiftright(void);
+#else
+static inline void lcd_disp_at_pos(char *str, unsigned char pos)
+{
+}
+
+static inline void lcd_shiftleft(void)
+{
+}
+
+static inline void lcd_shiftright(void)
+{
+}
+#endif
+
 #endif
diff --git a/arch/xtensa/platforms/xtfpga/lcd.c b/arch/xtensa/platforms/xtfpga/lcd.c
index 2872301598df..4dc0c1b43f4b 100644
--- a/arch/xtensa/platforms/xtfpga/lcd.c
+++ b/arch/xtensa/platforms/xtfpga/lcd.c
@@ -1,50 +1,63 @@
 /*
- * Driver for the LCD display on the Tensilica LX60 Board.
+ * Driver for the LCD display on the Tensilica XTFPGA board family.
+ * http://www.mytechcorp.com/cfdata/productFile/File1/MOC-16216B-B-A0A04.pdf
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
  * Copyright (C) 2001, 2006 Tensilica Inc.
+ * Copyright (C) 2015 Cadence Design Systems Inc.
  */
 
-/*
- *
- * FIXME: this code is from the examples from the LX60 user guide.
- *
- * The lcd_pause function does busy waiting, which is probably not
- * great. Maybe the code could be changed to use kernel timers, or
- * change the hardware to not need to wait.
- */
-
+#include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/io.h>
 
 #include <platform/hardware.h>
 #include <platform/lcd.h>
-#include <linux/delay.h>
 
-#define LCD_PAUSE_ITERATIONS	4000
+/* LCD instruction and data addresses. */
+#define LCD_INSTR_ADDR		((char *)IOADDR(CONFIG_XTFPGA_LCD_BASE_ADDR))
+#define LCD_DATA_ADDR		(LCD_INSTR_ADDR + 4)
+
 #define LCD_CLEAR		0x1
 #define LCD_DISPLAY_ON		0xc
 
 /* 8bit and 2 lines display */
 #define LCD_DISPLAY_MODE8BIT	0x38
+#define LCD_DISPLAY_MODE4BIT	0x28
 #define LCD_DISPLAY_POS		0x80
 #define LCD_SHIFT_LEFT		0x18
 #define LCD_SHIFT_RIGHT		0x1c
 
+static void lcd_put_byte(u8 *addr, u8 data)
+{
+#ifdef CONFIG_XTFPGA_LCD_8BIT_ACCESS
+	ACCESS_ONCE(*addr) = data;
+#else
+	ACCESS_ONCE(*addr) = data & 0xf0;
+	ACCESS_ONCE(*addr) = (data << 4) & 0xf0;
+#endif
+}
+
 static int __init lcd_init(void)
 {
-	*LCD_INSTR_ADDR = LCD_DISPLAY_MODE8BIT;
+	ACCESS_ONCE(*LCD_INSTR_ADDR) = LCD_DISPLAY_MODE8BIT;
 	mdelay(5);
-	*LCD_INSTR_ADDR = LCD_DISPLAY_MODE8BIT;
+	ACCESS_ONCE(*LCD_INSTR_ADDR) = LCD_DISPLAY_MODE8BIT;
 	udelay(200);
-	*LCD_INSTR_ADDR = LCD_DISPLAY_MODE8BIT;
+	ACCESS_ONCE(*LCD_INSTR_ADDR) = LCD_DISPLAY_MODE8BIT;
+	udelay(50);
+#ifndef CONFIG_XTFPGA_LCD_8BIT_ACCESS
+	ACCESS_ONCE(*LCD_INSTR_ADDR) = LCD_DISPLAY_MODE4BIT;
+	udelay(50);
+	lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_MODE4BIT);
 	udelay(50);
-	*LCD_INSTR_ADDR = LCD_DISPLAY_ON;
+#endif
+	lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_ON);
 	udelay(50);
-	*LCD_INSTR_ADDR = LCD_CLEAR;
+	lcd_put_byte(LCD_INSTR_ADDR, LCD_CLEAR);
 	mdelay(10);
 	lcd_disp_at_pos("XTENSA LINUX", 0);
 	return 0;
@@ -52,10 +65,10 @@ static int __init lcd_init(void)
 
 void lcd_disp_at_pos(char *str, unsigned char pos)
 {
-	*LCD_INSTR_ADDR = LCD_DISPLAY_POS | pos;
+	lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_POS | pos);
 	udelay(100);
 	while (*str != 0) {
-		*LCD_DATA_ADDR = *str;
+		lcd_put_byte(LCD_DATA_ADDR, *str);
 		udelay(200);
 		str++;
 	}
@@ -63,13 +76,13 @@ void lcd_disp_at_pos(char *str, unsigned char pos)
 
 void lcd_shiftleft(void)
 {
-	*LCD_INSTR_ADDR = LCD_SHIFT_LEFT;
+	lcd_put_byte(LCD_INSTR_ADDR, LCD_SHIFT_LEFT);
 	udelay(50);
 }
 
 void lcd_shiftright(void)
 {
-	*LCD_INSTR_ADDR = LCD_SHIFT_RIGHT;
+	lcd_put_byte(LCD_INSTR_ADDR, LCD_SHIFT_RIGHT);
 	udelay(50);
 }
 
-- 
2.3.7

[PATCH 3.12 060/142] xtensa: provide __NR_sync_file_range2 instead of __NR_sync_file_range

[Jiri Slaby]

From: Max Filippov <jcmvbkbc@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 01e84c70fe40c8111f960987bcf7f931842e6d07 upstream.

xtensa actually uses sync_file_range2 implementation, so it should
define __NR_sync_file_range2 as other architectures that use that
function. That fixes userspace interface (that apparently never worked)
and avoids special-casing xtensa in libc implementations.
See the thread ending at
http://lists.busybox.net/pipermail/uclibc/2015-February/048833.html
for more details.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/xtensa/include/uapi/asm/unistd.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/xtensa/include/uapi/asm/unistd.h b/arch/xtensa/include/uapi/asm/unistd.h
index 513effd48060..d07c1886bc8f 100644
--- a/arch/xtensa/include/uapi/asm/unistd.h
+++ b/arch/xtensa/include/uapi/asm/unistd.h
@@ -715,7 +715,7 @@ __SYSCALL(323, sys_process_vm_writev, 6)
 __SYSCALL(324, sys_name_to_handle_at, 5)
 #define __NR_open_by_handle_at			325
 __SYSCALL(325, sys_open_by_handle_at, 3)
-#define __NR_sync_file_range			326
+#define __NR_sync_file_range2			326
 __SYSCALL(326, sys_sync_file_range2, 6)
 #define __NR_perf_event_open			327
 __SYSCALL(327, sys_perf_event_open, 5)
-- 
2.3.7

[PATCH 3.12 061/142] xtensa: ISS: fix locking in TAP network adapter

[Jiri Slaby]

From: Max Filippov <jcmvbkbc@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 24e94454c8cb6a13634f5a2f5a01da53a546a58d upstream.

- don't lock lp->lock in the iss_net_timer for the call of iss_net_poll,
  it will lock it itself;
- invert order of lp->lock and opened_lock acquisition in the
  iss_net_open to make it consistent with iss_net_poll;
- replace spin_lock with spin_lock_bh when acquiring locks used in
  iss_net_timer from non-atomic context;
- replace spin_lock_irqsave with spin_lock_bh in the iss_net_start_xmit
  as the driver doesn't use lp->lock in the hard IRQ context;
- replace __SPIN_LOCK_UNLOCKED(lp.lock) with spin_lock_init, otherwise
  lockdep is unhappy about using non-static key.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/xtensa/platforms/iss/network.c | 31 ++++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

diff --git a/arch/xtensa/platforms/iss/network.c b/arch/xtensa/platforms/iss/network.c
index e9e1aad8c271..37141c8cd1a4 100644
--- a/arch/xtensa/platforms/iss/network.c
+++ b/arch/xtensa/platforms/iss/network.c
@@ -395,10 +395,10 @@ static void iss_net_timer(unsigned long priv)
 {
 	struct iss_net_private* lp = (struct iss_net_private*) priv;
 
-	spin_lock(&lp->lock);
-
 	iss_net_poll();
 
+	spin_lock(&lp->lock);
+
 	mod_timer(&lp->timer, jiffies + lp->timer_val);
 
 	spin_unlock(&lp->lock);
@@ -411,7 +411,7 @@ static int iss_net_open(struct net_device *dev)
 	char addr[sizeof "255.255.255.255\0"];
 	int err;
 
-	spin_lock(&lp->lock);
+	spin_lock_bh(&lp->lock);
 
 	if ((err = lp->tp.open(lp)) < 0)
 		goto out;
@@ -430,9 +430,11 @@ static int iss_net_open(struct net_device *dev)
 	while ((err = iss_net_rx(dev)) > 0)
 		;
 
-	spin_lock(&opened_lock);
+	spin_unlock_bh(&lp->lock);
+	spin_lock_bh(&opened_lock);
 	list_add(&lp->opened_list, &opened);
-	spin_unlock(&opened_lock);
+	spin_unlock_bh(&opened_lock);
+	spin_lock_bh(&lp->lock);
 
 	init_timer(&lp->timer);
 	lp->timer_val = ISS_NET_TIMER_VALUE;
@@ -441,7 +443,7 @@ static int iss_net_open(struct net_device *dev)
 	mod_timer(&lp->timer, jiffies + lp->timer_val);
 
 out:
-	spin_unlock(&lp->lock);
+	spin_unlock_bh(&lp->lock);
 	return err;
 }
 
@@ -450,7 +452,7 @@ static int iss_net_close(struct net_device *dev)
 	struct iss_net_private *lp = netdev_priv(dev);
 printk("iss_net_close!\n");
 	netif_stop_queue(dev);
-	spin_lock(&lp->lock);
+	spin_lock_bh(&lp->lock);
 
 	spin_lock(&opened_lock);
 	list_del(&opened);
@@ -460,18 +462,17 @@ printk("iss_net_close!\n");
 
 	lp->tp.close(lp);
 
-	spin_unlock(&lp->lock);
+	spin_unlock_bh(&lp->lock);
 	return 0;
 }
 
 static int iss_net_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct iss_net_private *lp = netdev_priv(dev);
-	unsigned long flags;
 	int len;
 
 	netif_stop_queue(dev);
-	spin_lock_irqsave(&lp->lock, flags);
+	spin_lock_bh(&lp->lock);
 
 	len = lp->tp.write(lp, &skb);
 
@@ -493,7 +494,7 @@ static int iss_net_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		printk(KERN_ERR "iss_net_start_xmit: failed(%d)\n", len);
 	}
 
-	spin_unlock_irqrestore(&lp->lock, flags);
+	spin_unlock_bh(&lp->lock);
 
 	dev_kfree_skb(skb);
 	return NETDEV_TX_OK;
@@ -532,9 +533,9 @@ static int iss_net_set_mac(struct net_device *dev, void *addr)
 	struct iss_net_private *lp = netdev_priv(dev);
 	struct sockaddr *hwaddr = addr;
 
-	spin_lock(&lp->lock);
+	spin_lock_bh(&lp->lock);
 	memcpy(dev->dev_addr, hwaddr->sa_data, ETH_ALEN);
-	spin_unlock(&lp->lock);
+	spin_unlock_bh(&lp->lock);
 #endif
 
 	return 0;
@@ -604,14 +605,14 @@ static int iss_net_configure(int index, char *init)
 	*lp = ((struct iss_net_private) {
 		.device_list		= LIST_HEAD_INIT(lp->device_list),
 		.opened_list		= LIST_HEAD_INIT(lp->opened_list),
-		.lock			= __SPIN_LOCK_UNLOCKED(lp.lock),
 		.dev			= dev,
 		.index			= index,
 		//.fd                   = -1,
 		.mac			= { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0 },
 		.have_mac		= 0,
-		});
+	});
 
+	spin_lock_init(&lp->lock);
 	/*
 	 * Try all transport protocols.
 	 * Note: more protocols can be added by adding '&& !X_init(lp, eth)'.
-- 
2.3.7

[PATCH 3.12 062/142] gpio: mvebu: Fix mask/unmask managment per irq chip type

[Jiri Slaby]

From: Gregory CLEMENT <gregory.clement@free-electrons.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 61819549f572edd7fce53f228c0d8420cdc85f71 upstream.

Level IRQ handlers and edge IRQ handler are managed by tow different
sets of registers. But currently the driver uses the same mask for the
both registers. It lead to issues with the following scenario:

First, an IRQ is requested on a GPIO to be triggered on front. After,
this an other IRQ is requested for a GPIO of the same bank but
triggered on level. Then the first one will be also setup to be
triggered on level. It leads to an interrupt storm.

The different kind of handler are already associated with two
different irq chip type. With this patch the driver uses a private
mask for each one which solves this issue.

It has been tested on an Armada XP based board and on an Armada 375
board. For the both boards, with this patch is applied, there is no
such interrupt storm when running the previous scenario.

This bug was already fixed but in a different way in the legacy
version of this driver by Evgeniy Dushistov:
9ece8839b1277fb9128ff6833411614ab6c88d68 "ARM: orion: Fix for certain
sequence of request_irq can cause irq storm". The fact the new version
of the gpio drive could be affected had been discussed there:
http://thread.gmane.org/gmane.linux.ports.arm.kernel/344670/focus=364012

Reported-by: Evgeniy A. Dushistov <dushistov@mail.ru>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/gpio/gpio-mvebu.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index db3129043e63..5eaafc868218 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -304,11 +304,13 @@ static void mvebu_gpio_edge_irq_mask(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
 	struct mvebu_gpio_chip *mvchip = gc->private;
+	struct irq_chip_type *ct = irq_data_get_chip_type(d);
 	u32 mask = 1 << (d->irq - gc->irq_base);
 
 	irq_gc_lock(gc);
-	gc->mask_cache &= ~mask;
-	writel_relaxed(gc->mask_cache, mvebu_gpioreg_edge_mask(mvchip));
+	ct->mask_cache_priv &= ~mask;
+
+	writel_relaxed(ct->mask_cache_priv, mvebu_gpioreg_edge_mask(mvchip));
 	irq_gc_unlock(gc);
 }
 
@@ -316,11 +318,13 @@ static void mvebu_gpio_edge_irq_unmask(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
 	struct mvebu_gpio_chip *mvchip = gc->private;
+	struct irq_chip_type *ct = irq_data_get_chip_type(d);
+
 	u32 mask = 1 << (d->irq - gc->irq_base);
 
 	irq_gc_lock(gc);
-	gc->mask_cache |= mask;
-	writel_relaxed(gc->mask_cache, mvebu_gpioreg_edge_mask(mvchip));
+	ct->mask_cache_priv |= mask;
+	writel_relaxed(ct->mask_cache_priv, mvebu_gpioreg_edge_mask(mvchip));
 	irq_gc_unlock(gc);
 }
 
@@ -328,11 +332,13 @@ static void mvebu_gpio_level_irq_mask(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
 	struct mvebu_gpio_chip *mvchip = gc->private;
+	struct irq_chip_type *ct = irq_data_get_chip_type(d);
+
 	u32 mask = 1 << (d->irq - gc->irq_base);
 
 	irq_gc_lock(gc);
-	gc->mask_cache &= ~mask;
-	writel_relaxed(gc->mask_cache, mvebu_gpioreg_level_mask(mvchip));
+	ct->mask_cache_priv &= ~mask;
+	writel_relaxed(ct->mask_cache_priv, mvebu_gpioreg_level_mask(mvchip));
 	irq_gc_unlock(gc);
 }
 
@@ -340,11 +346,13 @@ static void mvebu_gpio_level_irq_unmask(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
 	struct mvebu_gpio_chip *mvchip = gc->private;
+	struct irq_chip_type *ct = irq_data_get_chip_type(d);
+
 	u32 mask = 1 << (d->irq - gc->irq_base);
 
 	irq_gc_lock(gc);
-	gc->mask_cache |= mask;
-	writel_relaxed(gc->mask_cache, mvebu_gpioreg_level_mask(mvchip));
+	ct->mask_cache_priv |= mask;
+	writel_relaxed(ct->mask_cache_priv, mvebu_gpioreg_level_mask(mvchip));
 	irq_gc_unlock(gc);
 }
 
-- 
2.3.7

[PATCH 3.12 063/142] Drivers: hv: vmbus: Fix a bug in the error path in vmbus_open()

[Jiri Slaby]

From: "K. Y. Srinivasan" <kys@microsoft.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 40384e4bbeb9f2651fe9bffc0062d9f31ef625bf upstream.

Correctly rollback state if the failure occurs after we have handed over
the ownership of the buffer to the host.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/hv/channel.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index dea661331351..120237a90a86 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -178,7 +178,7 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
 			   GFP_KERNEL);
 	if (!open_info) {
 		err = -ENOMEM;
-		goto error0;
+		goto error_gpadl;
 	}
 
 	init_completion(&open_info->waitevent);
@@ -194,7 +194,7 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
 
 	if (userdatalen > MAX_USER_DEFINED_BYTES) {
 		err = -EINVAL;
-		goto error0;
+		goto error_gpadl;
 	}
 
 	if (userdatalen)
@@ -238,6 +238,9 @@ error1:
 	list_del(&open_info->msglistentry);
 	spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
 
+error_gpadl:
+	vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle);
+
 error0:
 	free_pages((unsigned long)out,
 		get_order(send_ringbuffer_size + recv_ringbuffer_size));
-- 
2.3.7

[PATCH 3.12 064/142] mvsas: fix panic on expander attached SATA devices

[Jiri Slaby]

From: James Bottomley <JBottomley@Odin.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 56cbd0ccc1b508de19561211d7ab9e1c77e6b384 upstream.

mvsas is giving a General protection fault when it encounters an expander
attached ATA device.  Analysis of mvs_task_prep_ata() shows that the driver is
assuming all ATA devices are locally attached and obtaining the phy mask by
indexing the local phy table (in the HBA structure) with the phy id.  Since
expanders have many more phys than the HBA, this is causing the index into the
HBA phy table to overflow and returning rubbish as the pointer.

mvs_task_prep_ssp() instead does the phy mask using the port properties.
Mirror this in mvs_task_prep_ata() to fix the panic.

Reported-by: Adam Talbot <ajtalbot1@gmail.com>
Tested-by: Adam Talbot <ajtalbot1@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/scsi/mvsas/mv_sas.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index 6b1b4e91e53f..1aa2a8cbb4df 100644
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -441,14 +441,11 @@ static u32 mvs_get_ncq_tag(struct sas_task *task, u32 *tag)
 static int mvs_task_prep_ata(struct mvs_info *mvi,
 			     struct mvs_task_exec_info *tei)
 {
-	struct sas_ha_struct *sha = mvi->sas;
 	struct sas_task *task = tei->task;
 	struct domain_device *dev = task->dev;
 	struct mvs_device *mvi_dev = dev->lldd_dev;
 	struct mvs_cmd_hdr *hdr = tei->hdr;
 	struct asd_sas_port *sas_port = dev->port;
-	struct sas_phy *sphy = dev->phy;
-	struct asd_sas_phy *sas_phy = sha->sas_phy[sphy->number];
 	struct mvs_slot_info *slot;
 	void *buf_prd;
 	u32 tag = tei->tag, hdr_tag;
@@ -468,7 +465,7 @@ static int mvs_task_prep_ata(struct mvs_info *mvi,
 	slot->tx = mvi->tx_prod;
 	del_q = TXQ_MODE_I | tag |
 		(TXQ_CMD_STP << TXQ_CMD_SHIFT) |
-		(MVS_PHY_ID << TXQ_PHY_SHIFT) |
+		((sas_port->phy_mask & TXQ_PHY_MASK) << TXQ_PHY_SHIFT) |
 		(mvi_dev->taskfileset << TXQ_SRS_SHIFT);
 	mvi->tx[mvi->tx_prod] = cpu_to_le32(del_q);
 
-- 
2.3.7

[PATCH 3.12 065/142] stk1160: Make sure current buffer is released

[Jiri Slaby]

From: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit aeff09276748b66072f2db2e668cec955cf41959 upstream.

The available (i.e. not used) buffers are returned by stk1160_clear_queue(),
on the stop_streaming() path. However, this is insufficient and the current
buffer must be released as well. Fix it.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/media/usb/stk1160/stk1160-v4l.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/media/usb/stk1160/stk1160-v4l.c b/drivers/media/usb/stk1160/stk1160-v4l.c
index c45c9881bb5f..4572530346fb 100644
--- a/drivers/media/usb/stk1160/stk1160-v4l.c
+++ b/drivers/media/usb/stk1160/stk1160-v4l.c
@@ -244,6 +244,11 @@ static int stk1160_stop_streaming(struct stk1160 *dev)
 	if (mutex_lock_interruptible(&dev->v4l_lock))
 		return -ERESTARTSYS;
 
+	/*
+	 * Once URBs are cancelled, the URB complete handler
+	 * won't be running. This is required to safely release the
+	 * current buffer (dev->isoc_ctl.buf).
+	 */
 	stk1160_cancel_isoc(dev);
 
 	/*
@@ -624,8 +629,16 @@ void stk1160_clear_queue(struct stk1160 *dev)
 		stk1160_info("buffer [%p/%d] aborted\n",
 				buf, buf->vb.v4l2_buf.index);
 	}
-	/* It's important to clear current buffer */
-	dev->isoc_ctl.buf = NULL;
+
+	/* It's important to release the current buffer */
+	if (dev->isoc_ctl.buf) {
+		buf = dev->isoc_ctl.buf;
+		dev->isoc_ctl.buf = NULL;
+
+		vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+		stk1160_info("buffer [%p/%d] aborted\n",
+				buf, buf->vb.v4l2_buf.index);
+	}
 	spin_unlock_irqrestore(&dev->buf_lock, flags);
 }
 
-- 
2.3.7

[PATCH 3.12 066/142] IB/core: disallow registering 0-sized memory region

[Jiri Slaby]

From: Yann Droneaud <ydroneaud@opteya.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 8abaae62f3fdead8f4ce0ab46b4ab93dee39bab2 upstream.

If ib_umem_get() is called with a size equal to 0 and an
non-page aligned address, one page will be pinned and a
0-sized umem will be returned to the caller.

This should not be allowed: it's not expected for a memory
region to have a size equal to 0.

This patch adds a check to explicitly refuse to register
a 0-sized region.

Link: http://mid.gmane.org/cover.1428929103.git.ydroneaud@opteya.com
Cc: Shachar Raindel <raindel@mellanox.com>
Cc: Jack Morgenstein <jackm@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/infiniband/core/umem.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index 055ebebc07dd..dccb9aac35c3 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -94,6 +94,9 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
 	if (dmasync)
 		dma_set_attr(DMA_ATTR_WRITE_BARRIER, &attrs);
 
+	if (!size)
+		return ERR_PTR(-EINVAL);
+
 	/*
 	 * If the combination of the addr and size requested for this memory
 	 * region causes an integer overflow, return error.
-- 
2.3.7

[PATCH 3.12 067/142] IB/core: don't disallow registering region starting at 0x0

[Jiri Slaby]

From: Yann Droneaud <ydroneaud@opteya.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 66578b0b2f69659f00b6169e6fe7377c4b100d18 upstream.

In a call to ib_umem_get(), if address is 0x0 and size is
already page aligned, check added in commit 8494057ab5e4
("IB/uverbs: Prevent integer overflow in ib_umem_get address
arithmetic") will refuse to register a memory region that
could otherwise be valid (provided vm.mmap_min_addr sysctl
and mmap_low_allowed SELinux knobs allow userspace to map
something at address 0x0).

This patch allows back such registration: ib_umem_get()
should probably don't care of the base address provided it
can be pinned with get_user_pages().

There's two possible overflows, in (addr + size) and in
PAGE_ALIGN(addr + size), this patch keep ensuring none
of them happen while allowing to pin memory at address
0x0. Anyway, the case of size equal 0 is no more (partially)
handled as 0-length memory region are disallowed by an
earlier check.

Link: http://mid.gmane.org/cover.1428929103.git.ydroneaud@opteya.com
Cc: Shachar Raindel <raindel@mellanox.com>
Cc: Jack Morgenstein <jackm@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/infiniband/core/umem.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index dccb9aac35c3..c1fef27010d4 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -101,8 +101,8 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
 	 * If the combination of the addr and size requested for this memory
 	 * region causes an integer overflow, return error.
 	 */
-	if ((PAGE_ALIGN(addr + size) <= size) ||
-	    (PAGE_ALIGN(addr + size) <= addr))
+	if (((addr + size) < addr) ||
+	    PAGE_ALIGN(addr + size) < (addr + size))
 		return ERR_PTR(-EINVAL);
 
 	if (!can_do_mlock())
-- 
2.3.7

[PATCH 3.12 068/142] IB/mlx4: Fix WQE LSO segment calculation

[Jiri Slaby]

From: Erez Shitrit <erezsh@mellanox.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit ca9b590caa17bcbbea119594992666e96cde9c2f upstream.

The current code decreases from the mss size (which is the gso_size
from the kernel skb) the size of the packet headers.

It shouldn't do that because the mss that comes from the stack
(e.g IPoIB) includes only the tcp payload without the headers.

The result is indication to the HW that each packet that the HW sends
is smaller than what it could be, and too many packets will be sent
for big messages.

An easy way to demonstrate one more aspect of the problem is by
configuring the ipoib mtu to be less than 2*hlen (2*56) and then
run app sending big TCP messages. This will tell the HW to send packets
with giant (negative value which under unsigned arithmetics becomes
a huge positive one) length and the QP moves to SQE state.

Fixes: b832be1e4007 ('IB/mlx4: Add IPoIB LSO support')
Reported-by: Matthew Finlay <matt@mellanox.com>
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/infiniband/hw/mlx4/qp.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 4f10af2905b5..262a18437ceb 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -2174,8 +2174,7 @@ static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_send_wr *wr,
 
 	memcpy(wqe->header, wr->wr.ud.header, wr->wr.ud.hlen);
 
-	*lso_hdr_sz  = cpu_to_be32((wr->wr.ud.mss - wr->wr.ud.hlen) << 16 |
-				   wr->wr.ud.hlen);
+	*lso_hdr_sz  = cpu_to_be32(wr->wr.ud.mss << 16 | wr->wr.ud.hlen);
 	*lso_seg_len = halign;
 	return 0;
 }
-- 
2.3.7

[PATCH 3.12 069/142] i2c: core: Export bus recovery functions

[Jiri Slaby]

From: Mark Brown <broonie@kernel.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit c1c21f4e60ed4523292f1a89ff45a208bddd3849 upstream.

Current -next fails to link an ARM allmodconfig because drivers that use
the core recovery functions can be built as modules but those functions
are not exported:

ERROR: "i2c_generic_gpio_recovery" [drivers/i2c/busses/i2c-davinci.ko] undefined!
ERROR: "i2c_generic_scl_recovery" [drivers/i2c/busses/i2c-davinci.ko] undefined!
ERROR: "i2c_recover_bus" [drivers/i2c/busses/i2c-davinci.ko] undefined!

Add exports to fix this.

Fixes: 5f9296ba21b3c (i2c: Add bus recovery infrastructure)
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/i2c/i2c-core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 3be58f89ac77..b5de139920e3 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -212,6 +212,7 @@ int i2c_generic_scl_recovery(struct i2c_adapter *adap)
 	adap->bus_recovery_info->set_scl(adap, 1);
 	return i2c_generic_recovery(adap);
 }
+EXPORT_SYMBOL_GPL(i2c_generic_scl_recovery);
 
 int i2c_generic_gpio_recovery(struct i2c_adapter *adap)
 {
@@ -226,6 +227,7 @@ int i2c_generic_gpio_recovery(struct i2c_adapter *adap)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(i2c_generic_gpio_recovery);
 
 int i2c_recover_bus(struct i2c_adapter *adap)
 {
@@ -235,6 +237,7 @@ int i2c_recover_bus(struct i2c_adapter *adap)
 	dev_dbg(&adap->dev, "Trying i2c bus recovery\n");
 	return adap->bus_recovery_info->recover_bus(adap);
 }
+EXPORT_SYMBOL_GPL(i2c_recover_bus);
 
 static int i2c_device_probe(struct device *dev)
 {
-- 
2.3.7

[PATCH 3.12 070/142] drm/radeon: fix doublescan modes (v2)

[Jiri Slaby]

From: Alex Deucher <alexander.deucher@amd.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit fd99a0943ffaa0320ea4f69d09ed188f950c0432 upstream.

Use the correct flags for atom.

v2: handle DRM_MODE_FLAG_DBLCLK

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/gpu/drm/radeon/atombios_crtc.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 65344d65ff91..ecd4a3dd51bb 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -332,8 +332,10 @@ atombios_set_crtc_dtd_timing(struct drm_crtc *crtc,
 		misc |= ATOM_COMPOSITESYNC;
 	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 		misc |= ATOM_INTERLACE;
-	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
+	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 		misc |= ATOM_DOUBLE_CLOCK_MODE;
+	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
+		misc |= ATOM_H_REPLICATIONBY2 | ATOM_V_REPLICATIONBY2;
 
 	args.susModeMiscInfo.usAccess = cpu_to_le16(misc);
 	args.ucCRTC = radeon_crtc->crtc_id;
@@ -376,8 +378,10 @@ static void atombios_crtc_set_timing(struct drm_crtc *crtc,
 		misc |= ATOM_COMPOSITESYNC;
 	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 		misc |= ATOM_INTERLACE;
-	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
+	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 		misc |= ATOM_DOUBLE_CLOCK_MODE;
+	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
+		misc |= ATOM_H_REPLICATIONBY2 | ATOM_V_REPLICATIONBY2;
 
 	args.susModeMiscInfo.usAccess = cpu_to_le16(misc);
 	args.ucCRTC = radeon_crtc->crtc_id;
-- 
2.3.7

[PATCH 3.12 071/142] drm/i915: cope with large i2c transfers

[Jiri Slaby]

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 9535c4757b881e06fae72a857485ad57c422b8d2 upstream.

The hardware, according to the specs, is limited to 256 byte transfers,
and current driver has no protections in case users attempt to do larger
transfers. The code will just stomp over status register and mayhem
ensues.

Let's split larger transfers into digestable chunks. Doing this allows
Atmel MXT driver on Pixel 1 function properly (it hasn't since commit
9d8dc3e529a19e427fd379118acd132520935c5d "Input: atmel_mxt_ts -
implement T44 message handling" which tries to consume multiple
touchscreen/touchpad reports in a single transaction).

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/gpu/drm/i915/i915_reg.h  |  1 +
 drivers/gpu/drm/i915/intel_i2c.c | 66 ++++++++++++++++++++++++++++++++++------
 2 files changed, 57 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 9d344da55056..4e0053e64f14 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1105,6 +1105,7 @@
 #define   GMBUS_CYCLE_INDEX	(2<<25)
 #define   GMBUS_CYCLE_STOP	(4<<25)
 #define   GMBUS_BYTE_COUNT_SHIFT 16
+#define   GMBUS_BYTE_COUNT_MAX   256U
 #define   GMBUS_SLAVE_INDEX_SHIFT 8
 #define   GMBUS_SLAVE_ADDR_SHIFT 1
 #define   GMBUS_SLAVE_READ	(1<<0)
diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
index d1c1e0f7f262..36b720475dc0 100644
--- a/drivers/gpu/drm/i915/intel_i2c.c
+++ b/drivers/gpu/drm/i915/intel_i2c.c
@@ -276,18 +276,17 @@ gmbus_wait_idle(struct drm_i915_private *dev_priv)
 }
 
 static int
-gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
-		u32 gmbus1_index)
+gmbus_xfer_read_chunk(struct drm_i915_private *dev_priv,
+		      unsigned short addr, u8 *buf, unsigned int len,
+		      u32 gmbus1_index)
 {
 	int reg_offset = dev_priv->gpio_mmio_base;
-	u16 len = msg->len;
-	u8 *buf = msg->buf;
 
 	I915_WRITE(GMBUS1 + reg_offset,
 		   gmbus1_index |
 		   GMBUS_CYCLE_WAIT |
 		   (len << GMBUS_BYTE_COUNT_SHIFT) |
-		   (msg->addr << GMBUS_SLAVE_ADDR_SHIFT) |
+		   (addr << GMBUS_SLAVE_ADDR_SHIFT) |
 		   GMBUS_SLAVE_READ | GMBUS_SW_RDY);
 	while (len) {
 		int ret;
@@ -309,11 +308,35 @@ gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
 }
 
 static int
-gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
+gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
+		u32 gmbus1_index)
 {
-	int reg_offset = dev_priv->gpio_mmio_base;
-	u16 len = msg->len;
 	u8 *buf = msg->buf;
+	unsigned int rx_size = msg->len;
+	unsigned int len;
+	int ret;
+
+	do {
+		len = min(rx_size, GMBUS_BYTE_COUNT_MAX);
+
+		ret = gmbus_xfer_read_chunk(dev_priv, msg->addr,
+					    buf, len, gmbus1_index);
+		if (ret)
+			return ret;
+
+		rx_size -= len;
+		buf += len;
+	} while (rx_size != 0);
+
+	return 0;
+}
+
+static int
+gmbus_xfer_write_chunk(struct drm_i915_private *dev_priv,
+		       unsigned short addr, u8 *buf, unsigned int len)
+{
+	int reg_offset = dev_priv->gpio_mmio_base;
+	unsigned int chunk_size = len;
 	u32 val, loop;
 
 	val = loop = 0;
@@ -325,8 +348,8 @@ gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
 	I915_WRITE(GMBUS3 + reg_offset, val);
 	I915_WRITE(GMBUS1 + reg_offset,
 		   GMBUS_CYCLE_WAIT |
-		   (msg->len << GMBUS_BYTE_COUNT_SHIFT) |
-		   (msg->addr << GMBUS_SLAVE_ADDR_SHIFT) |
+		   (chunk_size << GMBUS_BYTE_COUNT_SHIFT) |
+		   (addr << GMBUS_SLAVE_ADDR_SHIFT) |
 		   GMBUS_SLAVE_WRITE | GMBUS_SW_RDY);
 	while (len) {
 		int ret;
@@ -343,6 +366,29 @@ gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
 		if (ret)
 			return ret;
 	}
+
+	return 0;
+}
+
+static int
+gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
+{
+	u8 *buf = msg->buf;
+	unsigned int tx_size = msg->len;
+	unsigned int len;
+	int ret;
+
+	do {
+		len = min(tx_size, GMBUS_BYTE_COUNT_MAX);
+
+		ret = gmbus_xfer_write_chunk(dev_priv, msg->addr, buf, len);
+		if (ret)
+			return ret;
+
+		buf += len;
+		tx_size -= len;
+	} while (tx_size != 0);
+
 	return 0;
 }
 
-- 
2.3.7

[PATCH 3.12 072/142] RCU pathwalk breakage when running into a symlink overmounting something

[Jiri Slaby]

From: Al Viro <viro@zeniv.linux.org.uk>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 3cab989afd8d8d1bc3d99fef0e7ed87c31e7b647 upstream.

Calling unlazy_walk() in walk_component() and do_last() when we find
a symlink that needs to be followed doesn't acquire a reference to vfsmount.
That's fine when the symlink is on the same vfsmount as the parent directory
(which is almost always the case), but it's not always true - one _can_
manage to bind a symlink on top of something.  And in such cases we end up
with excessive mntput().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/namei.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 1004966437f9..c0c78e193e2a 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1557,7 +1557,8 @@ static inline int walk_component(struct nameidata *nd, struct path *path,
 
 	if (should_follow_link(inode, follow)) {
 		if (nd->flags & LOOKUP_RCU) {
-			if (unlikely(unlazy_walk(nd, path->dentry))) {
+			if (unlikely(nd->path.mnt != path->mnt ||
+				     unlazy_walk(nd, path->dentry))) {
 				err = -ECHILD;
 				goto out_err;
 			}
@@ -3023,7 +3024,8 @@ finish_lookup:
 
 	if (should_follow_link(inode, !symlink_ok)) {
 		if (nd->flags & LOOKUP_RCU) {
-			if (unlikely(unlazy_walk(nd, path->dentry))) {
+			if (unlikely(nd->path.mnt != path->mnt ||
+				     unlazy_walk(nd, path->dentry))) {
 				error = -ECHILD;
 				goto out;
 			}
-- 
2.3.7

[PATCH 3.12 073/142] ksoftirqd: Enable IRQs and call cond_resched() before poking RCU

[Jiri Slaby]

From: Calvin Owens <calvinowens@fb.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 28423ad283d5348793b0c45cc9b1af058e776fd6 upstream.

While debugging an issue with excessive softirq usage, I encountered the
following note in commit 3e339b5dae24a706 ("softirq: Use hotplug thread
infrastructure"):

    [ paulmck: Call rcu_note_context_switch() with interrupts enabled. ]

...but despite this note, the patch still calls RCU with IRQs disabled.

This seemingly innocuous change caused a significant regression in softirq
CPU usage on the sending side of a large TCP transfer (~1 GB/s): when
introducing 0.01% packet loss, the softirq usage would jump to around 25%,
spiking as high as 50%. Before the change, the usage would never exceed 5%.

Moving the call to rcu_note_context_switch() after the cond_sched() call,
as it was originally before the hotplug patch, completely eliminated this
problem.

Signed-off-by: Calvin Owens <calvinowens@fb.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Mike Galbraith <mgalbraith@suse.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 kernel/softirq.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/kernel/softirq.c b/kernel/softirq.c
index d7d498d8cc4f..b331c8756543 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -772,9 +772,13 @@ static void run_ksoftirqd(unsigned int cpu)
 	local_irq_disable();
 	if (local_softirq_pending()) {
 		__do_softirq();
-		rcu_note_context_switch(cpu);
 		local_irq_enable();
 		cond_resched();
+
+		preempt_disable();
+		rcu_note_context_switch(cpu);
+		preempt_enable();
+
 		return;
 	}
 	local_irq_enable();
-- 
2.3.7

[PATCH 3.12 074/142] e1000: add dummy allocator to fix race condition between mtu change and netpoll

[Jiri Slaby]

From: Sabrina Dubroca <sd@queasysnail.net>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 08e8331654d1d7b2c58045e549005bc356aa7810 upstream.

There is a race condition between e1000_change_mtu's cleanups and
netpoll, when we change the MTU across jumbo size:

Changing MTU frees all the rx buffers:
    e1000_change_mtu -> e1000_down -> e1000_clean_all_rx_rings ->
        e1000_clean_rx_ring

Then, close to the end of e1000_change_mtu:
    pr_info -> ... -> netpoll_poll_dev -> e1000_clean ->
        e1000_clean_rx_irq -> e1000_alloc_rx_buffers -> e1000_alloc_frag

And when we come back to do the rest of the MTU change:
    e1000_up -> e1000_configure -> e1000_configure_rx ->
        e1000_alloc_jumbo_rx_buffers

alloc_jumbo finds the buffers already != NULL, since data (shared with
page in e1000_rx_buffer->rxbuf) has been re-alloc'd, but it's garbage,
or at least not what is expected when in jumbo state.

This results in an unusable adapter (packets don't get through), and a
NULL pointer dereference on the next call to e1000_clean_rx_ring
(other mtu change, link down, shutdown):

BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: [<ffffffff81194d6e>] put_compound_page+0x7e/0x330

    [...]

Call Trace:
 [<ffffffff81195445>] put_page+0x55/0x60
 [<ffffffff815d9f44>] e1000_clean_rx_ring+0x134/0x200
 [<ffffffff815da055>] e1000_clean_all_rx_rings+0x45/0x60
 [<ffffffff815df5e0>] e1000_down+0x1c0/0x1d0
 [<ffffffff811e2260>] ? deactivate_slab+0x7f0/0x840
 [<ffffffff815e21bc>] e1000_change_mtu+0xdc/0x170
 [<ffffffff81647050>] dev_set_mtu+0xa0/0x140
 [<ffffffff81664218>] do_setlink+0x218/0xac0
 [<ffffffff814459e9>] ? nla_parse+0xb9/0x120
 [<ffffffff816652d0>] rtnl_newlink+0x6d0/0x890
 [<ffffffff8104f000>] ? kvm_clock_read+0x20/0x40
 [<ffffffff810a2068>] ? sched_clock_cpu+0xa8/0x100
 [<ffffffff81663802>] rtnetlink_rcv_msg+0x92/0x260

By setting the allocator to a dummy version, netpoll can't mess up our
rx buffers.  The allocator is set back to a sane value in
e1000_configure_rx.

Fixes: edbbb3ca1077 ("e1000: implement jumbo receive with partial descriptors")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/net/ethernet/intel/e1000/e1000_main.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c
index 15c85d4f3774..b7f68883da64 100644
--- a/drivers/net/ethernet/intel/e1000/e1000_main.c
+++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
@@ -144,6 +144,11 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
 				     struct e1000_rx_ring *rx_ring,
 				     int *work_done, int work_to_do);
+static void e1000_alloc_dummy_rx_buffers(struct e1000_adapter *adapter,
+					 struct e1000_rx_ring *rx_ring,
+					 int cleaned_count)
+{
+}
 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 				   struct e1000_rx_ring *rx_ring,
 				   int cleaned_count);
@@ -3566,8 +3571,11 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
 		msleep(1);
 	/* e1000_down has a dependency on max_frame_size */
 	hw->max_frame_size = max_frame;
-	if (netif_running(netdev))
+	if (netif_running(netdev)) {
+		/* prevent buffers from being reallocated */
+		adapter->alloc_rx_buf = e1000_alloc_dummy_rx_buffers;
 		e1000_down(adapter);
+	}
 
 	/* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
 	 * means we reserve 2 more, this pushes us to allocate from the next
-- 
2.3.7

[PATCH 3.12 075/142] lib: memzero_explicit: use barrier instead of OPTIMIZER_HIDE_VAR

[Jiri Slaby]

From: mancha security <mancha1@zoho.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 0b053c9518292705736329a8fe20ef4686ffc8e9 upstream.

OPTIMIZER_HIDE_VAR(), as defined when using gcc, is insufficient to
ensure protection from dead store optimization.

For the random driver and crypto drivers, calls are emitted ...

  $ gdb vmlinux
  (gdb) disassemble memzero_explicit
  Dump of assembler code for function memzero_explicit:
    0xffffffff813a18b0 <+0>:	push   %rbp
    0xffffffff813a18b1 <+1>:	mov    %rsi,%rdx
    0xffffffff813a18b4 <+4>:	xor    %esi,%esi
    0xffffffff813a18b6 <+6>:	mov    %rsp,%rbp
    0xffffffff813a18b9 <+9>:	callq  0xffffffff813a7120 <memset>
    0xffffffff813a18be <+14>:	pop    %rbp
    0xffffffff813a18bf <+15>:	retq
  End of assembler dump.

  (gdb) disassemble extract_entropy
  [...]
    0xffffffff814a5009 <+313>:	mov    %r12,%rdi
    0xffffffff814a500c <+316>:	mov    $0xa,%esi
    0xffffffff814a5011 <+321>:	callq  0xffffffff813a18b0 <memzero_explicit>
    0xffffffff814a5016 <+326>:	mov    -0x48(%rbp),%rax
  [...]

... but in case in future we might use facilities such as LTO, then
OPTIMIZER_HIDE_VAR() is not sufficient to protect gcc from a possible
eviction of the memset(). We have to use a compiler barrier instead.

Minimal test example when we assume memzero_explicit() would *not* be
a call, but would have been *inlined* instead:

  static inline void memzero_explicit(void *s, size_t count)
  {
    memset(s, 0, count);
    <foo>
  }

  int main(void)
  {
    char buff[20];

    snprintf(buff, sizeof(buff) - 1, "test");
    printf("%s", buff);

    memzero_explicit(buff, sizeof(buff));
    return 0;
  }

With <foo> := OPTIMIZER_HIDE_VAR():

  (gdb) disassemble main
  Dump of assembler code for function main:
  [...]
   0x0000000000400464 <+36>:	callq  0x400410 <printf@plt>
   0x0000000000400469 <+41>:	xor    %eax,%eax
   0x000000000040046b <+43>:	add    $0x28,%rsp
   0x000000000040046f <+47>:	retq
  End of assembler dump.

With <foo> := barrier():

  (gdb) disassemble main
  Dump of assembler code for function main:
  [...]
   0x0000000000400464 <+36>:	callq  0x400410 <printf@plt>
   0x0000000000400469 <+41>:	movq   $0x0,(%rsp)
   0x0000000000400471 <+49>:	movq   $0x0,0x8(%rsp)
   0x000000000040047a <+58>:	movl   $0x0,0x10(%rsp)
   0x0000000000400482 <+66>:	xor    %eax,%eax
   0x0000000000400484 <+68>:	add    $0x28,%rsp
   0x0000000000400488 <+72>:	retq
  End of assembler dump.

As can be seen, movq, movq, movl are being emitted inlined
via memset().

Reference: http://thread.gmane.org/gmane.linux.kernel.cryptoapi/13764/
Fixes: d4c5efdb9777 ("random: add and use memzero_explicit() for clearing data")
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: mancha security <mancha1@zoho.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 lib/string.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/string.c b/lib/string.c
index 43d0781daf47..cb9ea2181557 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -598,7 +598,7 @@ EXPORT_SYMBOL(memset);
 void memzero_explicit(void *s, size_t count)
 {
 	memset(s, 0, count);
-	OPTIMIZER_HIDE_VAR(s);
+	barrier();
 }
 EXPORT_SYMBOL(memzero_explicit);
 
-- 
2.3.7

[PATCH 3.12 076/142] wl18xx: show rx_frames_per_rates as an array as it really is

[Jiri Slaby]

From: Nicolas Iooss <nicolas.iooss_linux@m4x.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit a3fa71c40f1853d0c27e8f5bc01a722a705d9682 upstream.

In struct wl18xx_acx_rx_rate_stat, rx_frames_per_rates field is an
array, not a number.  This means WL18XX_DEBUGFS_FWSTATS_FILE can't be
used to display this field in debugfs (it would display a pointer, not
the actual data).  Use WL18XX_DEBUGFS_FWSTATS_FILE_ARRAY instead.

This bug has been found by adding a __printf attribute to
wl1271_format_buffer.  gcc complained about "format '%u' expects
argument of type 'unsigned int', but argument 5 has type 'u32 *'".

Fixes: c5d94169e818 ("wl18xx: use new fw stats structures")
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/net/wireless/ti/wl18xx/debugfs.c | 2 +-
 drivers/net/wireless/ti/wlcore/debugfs.h | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ti/wl18xx/debugfs.c b/drivers/net/wireless/ti/wl18xx/debugfs.c
index 7f1669cdea09..779dc2b2ca75 100644
--- a/drivers/net/wireless/ti/wl18xx/debugfs.c
+++ b/drivers/net/wireless/ti/wl18xx/debugfs.c
@@ -136,7 +136,7 @@ WL18XX_DEBUGFS_FWSTATS_FILE(rx_filter, protection_filter, "%u");
 WL18XX_DEBUGFS_FWSTATS_FILE(rx_filter, accum_arp_pend_requests, "%u");
 WL18XX_DEBUGFS_FWSTATS_FILE(rx_filter, max_arp_queue_dep, "%u");
 
-WL18XX_DEBUGFS_FWSTATS_FILE(rx_rate, rx_frames_per_rates, "%u");
+WL18XX_DEBUGFS_FWSTATS_FILE_ARRAY(rx_rate, rx_frames_per_rates, 50);
 
 WL18XX_DEBUGFS_FWSTATS_FILE_ARRAY(aggr_size, tx_agg_vs_rate,
 				  AGGR_STATS_TX_AGG*AGGR_STATS_TX_RATE);
diff --git a/drivers/net/wireless/ti/wlcore/debugfs.h b/drivers/net/wireless/ti/wlcore/debugfs.h
index f7381dd69009..1bce4325e86b 100644
--- a/drivers/net/wireless/ti/wlcore/debugfs.h
+++ b/drivers/net/wireless/ti/wlcore/debugfs.h
@@ -26,8 +26,8 @@
 
 #include "wlcore.h"
 
-int wl1271_format_buffer(char __user *userbuf, size_t count,
-			 loff_t *ppos, char *fmt, ...);
+__printf(4, 5) int wl1271_format_buffer(char __user *userbuf, size_t count,
+					loff_t *ppos, char *fmt, ...);
 
 int wl1271_debugfs_init(struct wl1271 *wl);
 void wl1271_debugfs_exit(struct wl1271 *wl);
-- 
2.3.7

[PATCH 3.12 077/142] crypto: omap-aes - Fix support for unequal lengths

[Jiri Slaby]

From: "Vutla, Lokesh" <lokeshvutla@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 6d7e7e02a044025237b6f62a20521170b794537f upstream.

For cases where total length of an input SGs is not same as
length of the input data for encryption, omap-aes driver
crashes. This happens in the case when IPsec is trying to use
omap-aes driver.

To avoid this, we copy all the pages from the input SG list
into a contiguous buffer and prepare a single element SG list
for this buffer with length as the total bytes to crypt, which is
similar thing that is done in case of unaligned lengths.

Fixes: 6242332ff2f3 ("crypto: omap-aes - Add support for cases of unaligned lengths")
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/crypto/omap-aes.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c
index ce791c2f81f7..56374ee92365 100644
--- a/drivers/crypto/omap-aes.c
+++ b/drivers/crypto/omap-aes.c
@@ -554,15 +554,23 @@ static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd)
 	return err;
 }
 
-int omap_aes_check_aligned(struct scatterlist *sg)
+int omap_aes_check_aligned(struct scatterlist *sg, int total)
 {
+	int len = 0;
+
 	while (sg) {
 		if (!IS_ALIGNED(sg->offset, 4))
 			return -1;
 		if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE))
 			return -1;
+
+		len += sg->length;
 		sg = sg_next(sg);
 	}
+
+	if (len != total)
+		return -1;
+
 	return 0;
 }
 
@@ -633,8 +641,8 @@ static int omap_aes_handle_queue(struct omap_aes_dev *dd,
 	dd->in_sg = req->src;
 	dd->out_sg = req->dst;
 
-	if (omap_aes_check_aligned(dd->in_sg) ||
-	    omap_aes_check_aligned(dd->out_sg)) {
+	if (omap_aes_check_aligned(dd->in_sg, dd->total) ||
+	    omap_aes_check_aligned(dd->out_sg, dd->total)) {
 		if (omap_aes_copy_sgs(dd))
 			pr_err("Failed to copy SGs for unaligned cases\n");
 		dd->sgs_copied = 1;
-- 
2.3.7

[PATCH 3.12 078/142] C6x: time: Ensure consistency in __init

[Jiri Slaby]

From: Nishanth Menon <nm@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit f4831605f2dacd12730fe73961c77253cc2ea425 upstream.

time_init invokes timer64_init (which is __init annotation)
since all of these are invoked at init time, lets maintain
consistency by ensuring time_init is marked appropriately
as well.

This fixes the following warning with CONFIG_DEBUG_SECTION_MISMATCH=y

WARNING: vmlinux.o(.text+0x3bfc): Section mismatch in reference from the function time_init() to the function .init.text:timer64_init()
The function time_init() references
the function __init timer64_init().
This is often because time_init lacks a __init
annotation or the annotation of timer64_init is wrong.

Fixes: 546a39546c64 ("C6X: time management")
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/c6x/kernel/time.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/c6x/kernel/time.c b/arch/c6x/kernel/time.c
index 356ee84cad95..04845aaf5985 100644
--- a/arch/c6x/kernel/time.c
+++ b/arch/c6x/kernel/time.c
@@ -49,7 +49,7 @@ u64 sched_clock(void)
 	return (tsc * sched_clock_multiplier) >> SCHED_CLOCK_SHIFT;
 }
 
-void time_init(void)
+void __init time_init(void)
 {
 	u64 tmp = (u64)NSEC_PER_SEC << SCHED_CLOCK_SHIFT;
 
-- 
2.3.7

[PATCH 3.12 079/142] memstick: mspro_block: add missing curly braces

[Jiri Slaby]

From: Dan Carpenter <dan.carpenter@oracle.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 13f6b191aaa11c7fd718d35a0c565f3c16bc1d99 upstream.

Using the indenting we can see the curly braces were obviously intended.
This is a static checker fix, but my guess is that we don't read enough
bytes, because we don't calculate "t_len" correctly.

Fixes: f1d82698029b ('memstick: use fully asynchronous request processing')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/memstick/core/mspro_block.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
index f4176ca3a794..cdd61ab5c2b5 100644
--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -758,7 +758,7 @@ static int mspro_block_complete_req(struct memstick_dev *card, int error)
 
 		if (error || (card->current_mrq.tpc == MSPRO_CMD_STOP)) {
 			if (msb->data_dir == READ) {
-				for (cnt = 0; cnt < msb->current_seg; cnt++)
+				for (cnt = 0; cnt < msb->current_seg; cnt++) {
 					t_len += msb->req_sg[cnt].length
 						 / msb->page_size;
 
@@ -766,6 +766,7 @@ static int mspro_block_complete_req(struct memstick_dev *card, int error)
 						t_len += msb->current_page - 1;
 
 					t_len *= msb->page_size;
+				}
 			}
 		} else
 			t_len = blk_rq_bytes(msb->block_req);
-- 
2.3.7

[PATCH 3.12 080/142] driver core: bus: Goto appropriate labels on failure in bus_add_device

[Jiri Slaby]

From: Junjie Mao <junjie_mao@yeah.net>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 1c34203a1496d1849ba978021b878b3447d433c8 upstream.

It is not necessary to call device_remove_groups() when device_add_groups()
fails.

The group added by device_add_groups() should be removed if sysfs_create_link()
fails.

Fixes: fa6fdb33b486 ("driver core: bus_type: add dev_groups")
Signed-off-by: Junjie Mao <junjie_mao@yeah.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/base/bus.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index aed92e41f291..f95dead9a8c2 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -504,11 +504,11 @@ int bus_add_device(struct device *dev)
 			goto out_put;
 		error = device_add_groups(dev, bus->dev_groups);
 		if (error)
-			goto out_groups;
+			goto out_id;
 		error = sysfs_create_link(&bus->p->devices_kset->kobj,
 						&dev->kobj, dev_name(dev));
 		if (error)
-			goto out_id;
+			goto out_groups;
 		error = sysfs_create_link(&dev->kobj,
 				&dev->bus->p->subsys.kobj, "subsystem");
 		if (error)
-- 
2.3.7

[PATCH 3.12 081/142] fs: take i_mutex during prepare_binprm for set[ug]id executables

[Jiri Slaby]

From: Jann Horn <jann@thejh.net>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 8b01fc86b9f425899f8a3a8fc1c47d73c2c20543 upstream.

This prevents a race between chown() and execve(), where chowning a
setuid-user binary to root would momentarily make the binary setuid
root.

This patch was mostly written by Linus Torvalds.

Signed-off-by: Jann Horn <jann@thejh.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Charles Williams <ciwillia@brocade.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/exec.c | 76 ++++++++++++++++++++++++++++++++++++++++-----------------------
 1 file changed, 48 insertions(+), 28 deletions(-)

diff --git a/fs/exec.c b/fs/exec.c
index 26bb91bf203b..d8b46a197172 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1272,6 +1272,53 @@ static int check_unsafe_exec(struct linux_binprm *bprm)
 	return res;
 }
 
+static void bprm_fill_uid(struct linux_binprm *bprm)
+{
+	struct inode *inode;
+	unsigned int mode;
+	kuid_t uid;
+	kgid_t gid;
+
+	/* clear any previous set[ug]id data from a previous binary */
+	bprm->cred->euid = current_euid();
+	bprm->cred->egid = current_egid();
+
+	if (bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID)
+		return;
+
+	if (current->no_new_privs)
+		return;
+
+	inode = file_inode(bprm->file);
+	mode = ACCESS_ONCE(inode->i_mode);
+	if (!(mode & (S_ISUID|S_ISGID)))
+		return;
+
+	/* Be careful if suid/sgid is set */
+	mutex_lock(&inode->i_mutex);
+
+	/* reload atomically mode/uid/gid now that lock held */
+	mode = inode->i_mode;
+	uid = inode->i_uid;
+	gid = inode->i_gid;
+	mutex_unlock(&inode->i_mutex);
+
+	/* We ignore suid/sgid if there are no mappings for them in the ns */
+	if (!kuid_has_mapping(bprm->cred->user_ns, uid) ||
+		 !kgid_has_mapping(bprm->cred->user_ns, gid))
+		return;
+
+	if (mode & S_ISUID) {
+		bprm->per_clear |= PER_CLEAR_ON_SETID;
+		bprm->cred->euid = uid;
+	}
+
+	if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
+		bprm->per_clear |= PER_CLEAR_ON_SETID;
+		bprm->cred->egid = gid;
+	}
+}
+
 /* 
  * Fill the binprm structure from the inode. 
  * Check permissions, then read the first 128 (BINPRM_BUF_SIZE) bytes
@@ -1280,39 +1327,12 @@ static int check_unsafe_exec(struct linux_binprm *bprm)
  */
 int prepare_binprm(struct linux_binprm *bprm)
 {
-	umode_t mode;
-	struct inode * inode = file_inode(bprm->file);
 	int retval;
 
-	mode = inode->i_mode;
 	if (bprm->file->f_op == NULL)
 		return -EACCES;
 
-	/* clear any previous set[ug]id data from a previous binary */
-	bprm->cred->euid = current_euid();
-	bprm->cred->egid = current_egid();
-
-	if (!(bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID) &&
-	    !current->no_new_privs &&
-	    kuid_has_mapping(bprm->cred->user_ns, inode->i_uid) &&
-	    kgid_has_mapping(bprm->cred->user_ns, inode->i_gid)) {
-		/* Set-uid? */
-		if (mode & S_ISUID) {
-			bprm->per_clear |= PER_CLEAR_ON_SETID;
-			bprm->cred->euid = inode->i_uid;
-		}
-
-		/* Set-gid? */
-		/*
-		 * If setgid is set but no group execute bit then this
-		 * is a candidate for mandatory locking, not a setgid
-		 * executable.
-		 */
-		if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
-			bprm->per_clear |= PER_CLEAR_ON_SETID;
-			bprm->cred->egid = inode->i_gid;
-		}
-	}
+	bprm_fill_uid(bprm);
 
 	/* fill in binprm security blob */
 	retval = security_bprm_set_creds(bprm);
-- 
2.3.7

[PATCH 3.12 082/142] mm: Fix NULL pointer dereference in madvise(MADV_WILLNEED) support

[Jiri Slaby]

From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit ee53664bda169f519ce3c6a22d378f0b946c8178 upstream.

Sasha Levin found a NULL pointer dereference that is due to a missing
page table lock, which in turn is due to the pmd entry in question being
a transparent huge-table entry.

The code - introduced in commit 1998cc048901 ("mm: make
madvise(MADV_WILLNEED) support swap file prefetch") - correctly checks
for this situation using pmd_none_or_trans_huge_or_clear_bad(), but it
turns out that that function doesn't work correctly.

pmd_none_or_trans_huge_or_clear_bad() expected that pmd_bad() would
trigger if the transparent hugepage bit was set, but it doesn't do that
if pmd_numa() is also set. Note that the NUMA bit only gets set on real
NUMA machines, so people trying to reproduce this on most normal
development systems would never actually trigger this.

Fix it by removing the very subtle (and subtly incorrect) expectation,
and instead just checking pmd_trans_huge() explicitly.

Reported-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
[ Additionally remove the now stale test for pmd_trans_huge() inside the
  pmd_bad() case - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 include/asm-generic/pgtable.h | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index a52136ce13ad..bc1f54cc2c02 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -599,11 +599,10 @@ static inline int pmd_none_or_trans_huge_or_clear_bad(pmd_t *pmd)
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 	barrier();
 #endif
-	if (pmd_none(pmdval))
+	if (pmd_none(pmdval) || pmd_trans_huge(pmdval))
 		return 1;
 	if (unlikely(pmd_bad(pmdval))) {
-		if (!pmd_trans_huge(pmdval))
-			pmd_clear_bad(pmd);
+		pmd_clear_bad(pmd);
 		return 1;
 	}
 	return 0;
-- 
2.3.7

[PATCH 3.12 083/142] staging: panel: fix lcd type

[Jiri Slaby]

From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 2c20d92dad5db6440cfa88d811b69fd605240ce4 upstream.

the lcd type as defined in the Kconfig is not matching in the code.
as a result the rs, rw and en pins were getting interchanged.
Kconfig defines the value of PANEL_LCD to be 1 if we select custom
configuration but in the code LCD_TYPE_CUSTOM is defined as 5.

my hardware is LCD_TYPE_CUSTOM, but the pins were assigned to it
as pins of LCD_TYPE_OLD, and it was not working.
Now values are corrected with referenece to the values defined in
Kconfig and it is working.
checked on JHD204A lcd with LCD_TYPE_CUSTOM configuration.

Cc: <stable@vger.kernel.org> # 2.6.32+
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Acked-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/staging/panel/panel.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/panel/panel.c b/drivers/staging/panel/panel.c
index cbc15c120981..04758f9328d3 100644
--- a/drivers/staging/panel/panel.c
+++ b/drivers/staging/panel/panel.c
@@ -275,11 +275,11 @@ static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES];
  * LCD types
  */
 #define LCD_TYPE_NONE		0
-#define LCD_TYPE_OLD		1
-#define LCD_TYPE_KS0074		2
-#define LCD_TYPE_HANTRONIX	3
-#define LCD_TYPE_NEXCOM		4
-#define LCD_TYPE_CUSTOM		5
+#define LCD_TYPE_CUSTOM		1
+#define LCD_TYPE_OLD		2
+#define LCD_TYPE_KS0074		3
+#define LCD_TYPE_HANTRONIX	4
+#define LCD_TYPE_NEXCOM		5
 
 /*
  * keypad types
@@ -457,8 +457,7 @@ MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead");
 static int lcd_type = -1;
 module_param(lcd_type, int, 0000);
 MODULE_PARM_DESC(lcd_type,
-		 "LCD type: 0=none, 1=old //, 2=serial ks0074, "
-		 "3=hantronix //, 4=nexcom //, 5=compiled-in");
+		 "LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom");
 
 static int lcd_proto = -1;
 module_param(lcd_proto, int, 0000);
-- 
2.3.7

[PATCH 3.12 084/142] ipv4: Missing sk_nulls_node_init() in ping_unhash().

[Jiri Slaby]

From: "David S. Miller" <davem@davemloft.net>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

[ Upstream commit a134f083e79fb4c3d0a925691e732c56911b4326 ]

If we don't do that, then the poison value is left in the ->pprev
backlink.

This can cause crashes if we do a disconnect, followed by a connect().

Tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Wen Xu <hotdog3645@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 net/ipv4/ping.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c
index a9f8e66f6dad..54012b8c0ef9 100644
--- a/net/ipv4/ping.c
+++ b/net/ipv4/ping.c
@@ -154,6 +154,7 @@ void ping_unhash(struct sock *sk)
 	if (sk_hashed(sk)) {
 		write_lock_bh(&ping_table.lock);
 		hlist_nulls_del(&sk->sk_nulls_node);
+		sk_nulls_node_init(&sk->sk_nulls_node);
 		sock_put(sk);
 		isk->inet_num = 0;
 		isk->inet_sport = 0;
-- 
2.3.7

[PATCH 3.12 085/142] UBI: fix soft lockup in ubi_check_volume()

[Jiri Slaby]

From: hujianyang <hujianyang@huawei.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 9aa272b492e7551a9ee0e2c83c720ea013698485 upstream.

Running mtd-utils/tests/ubi-tests/io_basic.c could cause
soft lockup or watchdog reset. It is because *updatevol*
will perform ubi_check_volume() after updating finish
and this function will full scan the updated lebs if the
volume is initialized as STATIC_VOLUME.

This patch adds *cond_resched()* in the loop of lebs scan
to avoid soft lockup.

Helped by Richard Weinberger <richard@nod.at>

[ 2158.067096] INFO: rcu_sched self-detected stall on CPU { 1}  (t=2101 jiffies g=1606 c=1605 q=56)
[ 2158.172867] CPU: 1 PID: 2073 Comm: io_basic Tainted: G           O 3.10.53 #21
[ 2158.172898] [<c000f624>] (unwind_backtrace+0x0/0x120) from [<c000c294>] (show_stack+0x10/0x14)
[ 2158.172918] [<c000c294>] (show_stack+0x10/0x14) from [<c008ac3c>] (rcu_check_callbacks+0x1c0/0x660)
[ 2158.172936] [<c008ac3c>] (rcu_check_callbacks+0x1c0/0x660) from [<c002b480>] (update_process_times+0x38/0x64)
[ 2158.172953] [<c002b480>] (update_process_times+0x38/0x64) from [<c005ff38>] (tick_sched_handle+0x54/0x60)
[ 2158.172966] [<c005ff38>] (tick_sched_handle+0x54/0x60) from [<c00601ac>] (tick_sched_timer+0x44/0x74)
[ 2158.172978] [<c00601ac>] (tick_sched_timer+0x44/0x74) from [<c003f348>] (__run_hrtimer+0xc8/0x1b8)
[ 2158.172992] [<c003f348>] (__run_hrtimer+0xc8/0x1b8) from [<c003fd9c>] (hrtimer_interrupt+0x128/0x2a4)
[ 2158.173007] [<c003fd9c>] (hrtimer_interrupt+0x128/0x2a4) from [<c0246f1c>] (arch_timer_handler_virt+0x28/0x30)
[ 2158.173022] [<c0246f1c>] (arch_timer_handler_virt+0x28/0x30) from [<c0086214>] (handle_percpu_devid_irq+0x9c/0x124)
[ 2158.173036] [<c0086214>] (handle_percpu_devid_irq+0x9c/0x124) from [<c0082bd8>] (generic_handle_irq+0x20/0x30)
[ 2158.173049] [<c0082bd8>] (generic_handle_irq+0x20/0x30) from [<c000969c>] (handle_IRQ+0x64/0x8c)
[ 2158.173060] [<c000969c>] (handle_IRQ+0x64/0x8c) from [<c0008544>] (gic_handle_irq+0x3c/0x60)
[ 2158.173074] [<c0008544>] (gic_handle_irq+0x3c/0x60) from [<c02f0f80>] (__irq_svc+0x40/0x50)
[ 2158.173083] Exception stack(0xc4043c98 to 0xc4043ce0)
[ 2158.173092] 3c80:                                                       c4043ce4 00000019
[ 2158.173102] 3ca0: 1f8a865f c050ad10 1f8a864c 00000031 c04b5970 0003ebce 00000000 f3550000
[ 2158.173113] 3cc0: bf00bc68 00000800 0003ebce c4043ce0 c0186d14 c0186cb8 80000013 ffffffff
[ 2158.173130] [<c02f0f80>] (__irq_svc+0x40/0x50) from [<c0186cb8>] (read_current_timer+0x4/0x38)
[ 2158.173145] [<c0186cb8>] (read_current_timer+0x4/0x38) from [<1f8a865f>] (0x1f8a865f)
[ 2183.927097] BUG: soft lockup - CPU#1 stuck for 22s! [io_basic:2073]
[ 2184.002229] Modules linked in: nandflash(O) [last unloaded: nandflash]

Signed-off-by: Wang Kai <morgan.wang@huawei.com>
Signed-off-by: hujianyang <hujianyang@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/mtd/ubi/misc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mtd/ubi/misc.c b/drivers/mtd/ubi/misc.c
index f913d701a5b3..c4b1af07a121 100644
--- a/drivers/mtd/ubi/misc.c
+++ b/drivers/mtd/ubi/misc.c
@@ -74,6 +74,8 @@ int ubi_check_volume(struct ubi_device *ubi, int vol_id)
 	for (i = 0; i < vol->used_ebs; i++) {
 		int size;
 
+		cond_resched();
+
 		if (i == vol->used_ebs - 1)
 			size = vol->last_eb_bytes;
 		else
-- 
2.3.7

[PATCH 3.12 086/142] ALSA: emux: Fix mutex deadlock at unloading

[Jiri Slaby]

From: Takashi Iwai <tiwai@suse.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 07b0e5d49d227e3950cb13a3e8caf248ef2a310e upstream.

The emux-synth driver has a possible AB/BA mutex deadlock at unloading
the emu10k1 driver:

  snd_emux_free() ->
    snd_emux_detach_seq(): mutex_lock(&emu->register_mutex) ->
      snd_seq_delete_kernel_client() ->
        snd_seq_free_client(): mutex_lock(&register_mutex)

  snd_seq_release() ->
    snd_seq_free_client(): mutex_lock(&register_mutex) ->
      snd_seq_delete_all_ports() ->
        snd_emux_unuse(): mutex_lock(&emu->register_mutex)

Basically snd_emux_detach_seq() doesn't need a protection of
emu->register_mutex as it's already being unregistered.  So, we can
get rid of this for avoiding the deadlock.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 sound/synth/emux/emux_seq.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/sound/synth/emux/emux_seq.c b/sound/synth/emux/emux_seq.c
index 7778b8e19782..188fda0effb0 100644
--- a/sound/synth/emux/emux_seq.c
+++ b/sound/synth/emux/emux_seq.c
@@ -124,12 +124,10 @@ snd_emux_detach_seq(struct snd_emux *emu)
 	if (emu->voices)
 		snd_emux_terminate_all(emu);
 		
-	mutex_lock(&emu->register_mutex);
 	if (emu->client >= 0) {
 		snd_seq_delete_kernel_client(emu->client);
 		emu->client = -1;
 	}
-	mutex_unlock(&emu->register_mutex);
 }
 
 
-- 
2.3.7

[PATCH 3.12 087/142] ALSA: emux: Fix mutex deadlock in OSS emulation

[Jiri Slaby]

From: Takashi Iwai <tiwai@suse.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 1c94e65c668f44d2c69ae7e7fc268ab3268fba3e upstream.

The OSS emulation in synth-emux helper has a potential AB/BA deadlock
at the simultaneous closing and opening:

  close ->
    snd_seq_release() ->
      sne_seq_free_client() ->
        snd_seq_delete_all_ports(): takes client->ports_mutex ->
	  port_delete() ->
	    snd_emux_unuse(): takes emux->register_mutex

  open ->
    snd_seq_oss_open() ->
      snd_emux_open_seq_oss(): takes emux->register_mutex ->
        snd_seq_event_port_attach() ->
	  snd_seq_create_port(): takes client->ports_mutex

This patch addresses the deadlock by reducing the rance taking
emux->register_mutex in snd_emux_open_seq_oss().  The lock is needed
for the refcount handling, so move it locally.  The calls in
emux_seq.c are already with the mutex, thus they are replaced with the
version without mutex lock/unlock.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 sound/synth/emux/emux_oss.c | 11 +----------
 sound/synth/emux/emux_seq.c | 27 +++++++++++++++++++++------
 2 files changed, 22 insertions(+), 16 deletions(-)

diff --git a/sound/synth/emux/emux_oss.c b/sound/synth/emux/emux_oss.c
index 319754cf6208..daf61abc3670 100644
--- a/sound/synth/emux/emux_oss.c
+++ b/sound/synth/emux/emux_oss.c
@@ -118,12 +118,8 @@ snd_emux_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)
 	if (snd_BUG_ON(!arg || !emu))
 		return -ENXIO;
 
-	mutex_lock(&emu->register_mutex);
-
-	if (!snd_emux_inc_count(emu)) {
-		mutex_unlock(&emu->register_mutex);
+	if (!snd_emux_inc_count(emu))
 		return -EFAULT;
-	}
 
 	memset(&callback, 0, sizeof(callback));
 	callback.owner = THIS_MODULE;
@@ -135,7 +131,6 @@ snd_emux_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)
 	if (p == NULL) {
 		snd_printk(KERN_ERR "can't create port\n");
 		snd_emux_dec_count(emu);
-		mutex_unlock(&emu->register_mutex);
 		return -ENOMEM;
 	}
 
@@ -148,8 +143,6 @@ snd_emux_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)
 	reset_port_mode(p, arg->seq_mode);
 
 	snd_emux_reset_port(p);
-
-	mutex_unlock(&emu->register_mutex);
 	return 0;
 }
 
@@ -195,13 +188,11 @@ snd_emux_close_seq_oss(struct snd_seq_oss_arg *arg)
 	if (snd_BUG_ON(!emu))
 		return -ENXIO;
 
-	mutex_lock(&emu->register_mutex);
 	snd_emux_sounds_off_all(p);
 	snd_soundfont_close_check(emu->sflist, SF_CLIENT_NO(p->chset.port));
 	snd_seq_event_port_detach(p->chset.client, p->chset.port);
 	snd_emux_dec_count(emu);
 
-	mutex_unlock(&emu->register_mutex);
 	return 0;
 }
 
diff --git a/sound/synth/emux/emux_seq.c b/sound/synth/emux/emux_seq.c
index 188fda0effb0..a0209204ae48 100644
--- a/sound/synth/emux/emux_seq.c
+++ b/sound/synth/emux/emux_seq.c
@@ -267,8 +267,8 @@ snd_emux_event_input(struct snd_seq_event *ev, int direct, void *private_data,
 /*
  * increment usage count
  */
-int
-snd_emux_inc_count(struct snd_emux *emu)
+static int
+__snd_emux_inc_count(struct snd_emux *emu)
 {
 	emu->used++;
 	if (!try_module_get(emu->ops.owner))
@@ -282,12 +282,21 @@ snd_emux_inc_count(struct snd_emux *emu)
 	return 1;
 }
 
+int snd_emux_inc_count(struct snd_emux *emu)
+{
+	int ret;
+
+	mutex_lock(&emu->register_mutex);
+	ret = __snd_emux_inc_count(emu);
+	mutex_unlock(&emu->register_mutex);
+	return ret;
+}
 
 /*
  * decrease usage count
  */
-void
-snd_emux_dec_count(struct snd_emux *emu)
+static void
+__snd_emux_dec_count(struct snd_emux *emu)
 {
 	module_put(emu->card->module);
 	emu->used--;
@@ -296,6 +305,12 @@ snd_emux_dec_count(struct snd_emux *emu)
 	module_put(emu->ops.owner);
 }
 
+void snd_emux_dec_count(struct snd_emux *emu)
+{
+	mutex_lock(&emu->register_mutex);
+	__snd_emux_dec_count(emu);
+	mutex_unlock(&emu->register_mutex);
+}
 
 /*
  * Routine that is called upon a first use of a particular port
@@ -315,7 +330,7 @@ snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info)
 
 	mutex_lock(&emu->register_mutex);
 	snd_emux_init_port(p);
-	snd_emux_inc_count(emu);
+	__snd_emux_inc_count(emu);
 	mutex_unlock(&emu->register_mutex);
 	return 0;
 }
@@ -338,7 +353,7 @@ snd_emux_unuse(void *private_data, struct snd_seq_port_subscribe *info)
 
 	mutex_lock(&emu->register_mutex);
 	snd_emux_sounds_off_all(p);
-	snd_emux_dec_count(emu);
+	__snd_emux_dec_count(emu);
 	mutex_unlock(&emu->register_mutex);
 	return 0;
 }
-- 
2.3.7

[PATCH 3.12 088/142] ALSA: emu10k1: Fix card shortname string buffer overflow

[Jiri Slaby]

From: Takashi Iwai <tiwai@suse.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit d02260824e2cad626fb2a9d62e27006d34b6dedc upstream.

Some models provide too long string for the shortname that has 32bytes
including the terminator, and it results in a non-terminated string
exposed to the user-space.  This isn't too critical, though, as the
string is stopped at the succeeding longname string.

This patch fixes such entries by dropping "SB" prefix (it's enough to
fit within 32 bytes, so far).  Meanwhile, it also changes strcpy()
with strlcpy() to make sure that this kind of problem won't happen in
future, too.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 sound/pci/emu10k1/emu10k1.c      | 6 ++++--
 sound/pci/emu10k1/emu10k1_main.c | 4 ++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/sound/pci/emu10k1/emu10k1.c b/sound/pci/emu10k1/emu10k1.c
index 9e1bd0c39a8c..6757458e8db6 100644
--- a/sound/pci/emu10k1/emu10k1.c
+++ b/sound/pci/emu10k1/emu10k1.c
@@ -181,8 +181,10 @@ static int snd_card_emu10k1_probe(struct pci_dev *pci,
 	}
 #endif
  
-	strcpy(card->driver, emu->card_capabilities->driver);
-	strcpy(card->shortname, emu->card_capabilities->name);
+	strlcpy(card->driver, emu->card_capabilities->driver,
+		sizeof(card->driver));
+	strlcpy(card->shortname, emu->card_capabilities->name,
+		sizeof(card->shortname));
 	snprintf(card->longname, sizeof(card->longname),
 		 "%s (rev.%d, serial:0x%x) at 0x%lx, irq %i",
 		 card->shortname, emu->revision, emu->serial, emu->port, emu->irq);
diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c
index bdd888ec9a84..134b7cf95ad4 100644
--- a/sound/pci/emu10k1/emu10k1_main.c
+++ b/sound/pci/emu10k1/emu10k1_main.c
@@ -1411,7 +1411,7 @@ static struct snd_emu_chip_details emu_chip_details[] = {
 	 *
 	 */
 	{.vendor = 0x1102, .device = 0x0008, .subsystem = 0x20011102,
-	 .driver = "Audigy2", .name = "SB Audigy 2 ZS Notebook [SB0530]",
+	 .driver = "Audigy2", .name = "Audigy 2 ZS Notebook [SB0530]",
 	 .id = "Audigy2",
 	 .emu10k2_chip = 1,
 	 .ca0108_chip = 1,
@@ -1561,7 +1561,7 @@ static struct snd_emu_chip_details emu_chip_details[] = {
 	 .adc_1361t = 1,  /* 24 bit capture instead of 16bit */
 	 .ac97_chip = 1} ,
 	{.vendor = 0x1102, .device = 0x0004, .subsystem = 0x10051102,
-	 .driver = "Audigy2", .name = "SB Audigy 2 Platinum EX [SB0280]",
+	 .driver = "Audigy2", .name = "Audigy 2 Platinum EX [SB0280]",
 	 .id = "Audigy2",
 	 .emu10k2_chip = 1,
 	 .ca0102_chip = 1,
-- 
2.3.7

[PATCH 3.12 000/142] 3.12.43-stable review

[Jiri Slaby]

This is the start of the stable review cycle for the 3.12.43 release.
There are 142 patches in this series, all will be posted as a response
to this one.  If anyone has any issues with these being applied, please
let me know.

Responses should be made by Wed May 20 09:36:47 CEST 2015.
Anything received after that time might be too late.

The whole patch series can be found in one patch at:
	http://kernel.org/pub/linux/kernel/people/jirislaby/stable-review/patch-3.12.43-rc1.xz
and the diffstat can be found below.

thanks,
js

===============


Al Viro (2):
  RCU pathwalk breakage when running into a symlink overmounting
    something
  seq_file: always clear m->count when we free m->buf

Alex Deucher (2):
  drm/radeon: fix doublescan modes (v2)
  drm/radeon: add SI DPM quirk for Sapphire R9 270 Dual-X 2G GDDR5

Alexander Ploumistos (1):
  Bluetooth: ath3k: Add support Atheros AR5B195 combo Mini PCIe card

Alexey Khoroshilov (1):
  sound/oss: fix deadlock in sequencer_ioctl(SNDCTL_SEQ_OUTOFBAND)

Andrey Ryabinin (1):
  ARM: 8320/1: fix integer overflow in ELF_ET_DYN_BASE

Andrzej Pietrasiewicz (1):
  usb: gadget: printer: enqueue printer's response for setup request

Anton Blanchard (1):
  powerpc/perf: Cap 64bit userspace backtraces to PERF_MAX_STACK_DEPTH

Arun Chandran (1):
  arm64: vdso: fix build error when switching from LE to BE

Axel Lin (1):
  usb: phy: Find the right match in devm_usb_phy_match

Boris Ostrovsky (1):
  xen/console: Update console event channel on resume

Brian Norris (4):
  UBI: account for bitflips in both the VID header and data
  UBI: fix out of bounds write
  UBI: initialize LEB number variable
  UBI: fix check for "too many bytes"

Calvin Owens (1):
  ksoftirqd: Enable IRQs and call cond_resched() before poking RCU

Charles Keepax (2):
  ARM: S3C64XX: Use fixed IRQ bases to avoid conflicts on Cragganmore
  ASoC: dapm: Enable autodisable on SOC_DAPM_SINGLE_TLV_AUTODISABLE

Christian König (3):
  drm/radeon: disable semaphores for UVD V1 (v2)
  drm/radeon: make UVD handle checking more strict
  drm/radeon: more strictly validate the UVD codec

Christoph Hellwig (3):
  3w-xxxx: fix command completion race
  3w-9xxx: fix command completion race
  3w-sas: fix command completion race

Chuanxiao Dong (1):
  mmc: card: Don't access RPMB partitions for normal read/write

Dan Carpenter (1):
  memstick: mspro_block: add missing curly braces

Dave Olson (1):
  powerpc: Fix missing L2 cache size in /sys/devices/system/cpu

David S. Miller (1):
  ipv4: Missing sk_nulls_node_init() in ping_unhash().

David Sterba (1):
  btrfs: don't accept bare namespace as a valid xattr

Dmitry Torokhov (1):
  drm/i915: cope with large i2c transfers

Doug Anderson (1):
  pinctrl: Don't just pretend to protect pinctrl_maps, do it for real

Ekaterina Tumanova (1):
  KVM: s390: Zero out current VMDB of STSI before including level3 data.

Erez Shitrit (1):
  IB/mlx4: Fix WQE LSO segment calculation

Eric Dumazet (4):
  tcp: fix possible deadlock in tcp_send_fin()
  tcp: avoid looping in tcp_send_fin()
  net: do not deplete pfmemalloc reserve
  net: fix crash in build_skb()

Eric W. Biederman (1):
  mnt: Fix fs_fully_visible to verify the root directory is visible

Ezequiel Garcia (1):
  stk1160: Make sure current buffer is released

Fabio Estevam (1):
  ARM: dts: imx23-olinuxino: Fix polarity of LED GPIO

Felipe Balbi (14):
  usb: gadget: composite: enable BESL support
  usb: define a generic USB_RESUME_TIMEOUT macro
  usb: host: fusbh200: use new USB_RESUME_TIMEOUT
  usb: host: uhci: use new USB_RESUME_TIMEOUT
  usb: host: fotg210: use new USB_RESUME_TIMEOUT
  usb: host: r8a66597: use new USB_RESUME_TIMEOUT
  usb: host: isp116x: use new USB_RESUME_TIMEOUT
  usb: host: xhci: use new USB_RESUME_TIMEOUT
  usb: host: sl811: use new USB_RESUME_TIMEOUT
  usb: dwc2: hcd: use new USB_RESUME_TIMEOUT
  usb: core: hub: use new USB_RESUME_TIMEOUT
  usb: musb: use new USB_RESUME_TIMEOUT
  usb: host: oxu210hp: use new USB_RESUME_TIMEOUT
  usb: host: ehci: use new USB_RESUME_TIMEOUT

Filipe Manana (3):
  Btrfs: fix log tree corruption when fs mounted with -o discard
  Btrfs: fix inode eviction infinite loop after cloning into it
  Btrfs: fix inode eviction infinite loop after extent_same ioctl

Geert Uytterhoeven (1):
  nosave: consolidate __nosave_{begin,end} in <asm/sections.h>

Gerald Schaefer (1):
  mm/hugetlb: use pmd_page() in follow_huge_pmd()

Gregory CLEMENT (2):
  gpio: mvebu: Fix mask/unmask managment per irq chip type
  ARM: mvebu: armada-xp-openblocks-ax3-4: Disable internal RTC

Grygorii Strashko (1):
  mmc: core: add missing pm event in mmc_pm_notify to fix hib restore

Guenter Roeck (1):
  drivers: parport: Kconfig: exclude arm64 for PARPORT_PC

Heiko Carstens (3):
  s390/hibernate: fix save and restore of kernel text section
  /proc/stat: convert to single_open_size()
  fs/seq_file: fallback to vmalloc allocation

Huacai Chen (1):
  MIPS: Hibernate: flush TLB entries earlier

Ian Abbott (1):
  spi: spidev: fix possible arithmetic overflow for multi-transfer
    message

Ilya Dryomov (1):
  rbd: end I/O the entire obj_request on error

James Bottomley (1):
  mvsas: fix panic on expander attached SATA devices

Jann Horn (1):
  fs: take i_mutex during prepare_binprm for set[ug]id executables

Jason Gunthorpe (1):
  RDMA/CMA: Canonize IPv4 on IPV6 sockets properly

Johan Hovold (2):
  gpio: unregister gpiochip device before removing it
  gpio: sysfs: fix memory leaks and device hotplug

Junjie Mao (1):
  driver core: bus: Goto appropriate labels on failure in bus_add_device

Junxiao Bi (1):
  ocfs2: dlm: fix race between purge and get lock resource

K. Y. Srinivasan (3):
  scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
  Drivers: hv: vmbus: Fix a bug in the error path in vmbus_open()
  Drivers: hv: vmbus: Don't wait after requesting offers

Kirill A. Shutemov (1):
  mm: Fix NULL pointer dereference in madvise(MADV_WILLNEED) support

Konstantin Khlebnikov (2):
  mm: prevent endless growth of anon_vma hierarchy
  mm: fix corner case in anon_vma endless growing prevention

Krzysztof Kozlowski (3):
  compal-laptop: Check return value of power_supply_register
  power_supply: twl4030_madc: Check return value of
    power_supply_register
  power_supply: lp8788-charger: Fix leaked power supply on probe fail

Larry Finger (1):
  rtlwifi: rtl8192cu: Add new USB ID

Len Brown (1):
  sched/idle/x86: Restore mwait_idle() to fix boot hangs, to improve
    power savings and to improve performance

Leon Yu (1):
  mm: fix anon_vma->degree underflow in anon_vma endless growing
    prevention

Ludovic Desroches (1):
  tty/serial: at91: maxburst was missing for dma transfers

Lukas Czerner (2):
  ext4: make fsync to sync parent dir in no-journal for real this time
  ext4: fix data corruption caused by unwritten and delayed extents

Lukas Wunner (1):
  drm/i915: Add missing MacBook Pro models with dual channel LVDS

Lv Zheng (5):
  ACPICA: Utilities: split IO address types from data type models.
  ACPICA: Tables: Change acpi_find_root_pointer() to use
    acpi_physical_address.
  ACPICA: Utilities: Cleanup to enforce
    ACPI_PHYSADDR_TO_PTR()/ACPI_PTR_TO_PHYSADDR().
  ACPICA: Utilities: Cleanup to convert physical address printing
    formats.
  ACPICA: Utilities: Cleanup to remove useless ACPI_PRINTF/FORMAT_xxx
    helpers.

Marek Vasut (2):
  rtlwifi: rtl8192cu: Add new device ID
  ARM: dts: imx28: Fix AUART4 TX-DMA interrupt name

Mark Brown (1):
  i2c: core: Export bus recovery functions

Markus Pargmann (1):
  ARM: dts: imx25: Add #pwm-cells to pwm4

Max Filippov (3):
  xtensa: xtfpga: fix hardware lockup caused by LCD driver
  xtensa: provide __NR_sync_file_range2 instead of __NR_sync_file_range
  xtensa: ISS: fix locking in TAP network adapter

Michael Davidson (1):
  fs/binfmt_elf.c: fix bug in loading of PIE binaries

Michael Gernoth (1):
  ALSA: emu10k1: don't deadlock in proc-functions

Michal Simek (1):
  serial: of-serial: Remove device_type = "serial" registration

Naoya Horiguchi (2):
  mm/memory-failure: call shake_page() when error hits thp tail page
  mm: soft-offline: fix num_poisoned_pages counting on concurrent events

Nicholas Bellinger (1):
  target: Fix COMPARE_AND_WRITE with SG_TO_MEM_NOALLOC handling

Nicolas Iooss (1):
  wl18xx: show rx_frames_per_rates as an array as it really is

Nishanth Menon (1):
  C6x: time: Ensure consistency in __init

Oleg Nesterov (1):
  ptrace: fix race between ptrace_resume() and wait_task_stopped()

Oliver Neukum (1):
  cdc-wdm: fix endianness bug in debug statements

Peter Zubaj (1):
  ALSA: emu10k1: Emu10k2 32 bit DMA mode

Radim Krčmář (1):
  KVM: use slowpath for cross page cached accesses

Ryusuke Konishi (1):
  nilfs2: fix sanity check of btree level in nilfs_btree_root_broken()

Sabrina Dubroca (1):
  e1000: add dummy allocator to fix race condition between mtu change
    and netpoll

Sebastian Hesselbarth (1):
  ARM: dts: dove: Fix uart[23] reg property

Sebastian Pöhn (1):
  ip_forward: Drop frames with attached skb->sk

Stefan Wahren (1):
  ARM: dts: imx23-olinuxino: Fix dr_mode of usb0

Steven Rostedt (1):
  ring-buffer: Replace this_cpu_*() with __this_cpu_*()

Steven Rostedt (Red Hat) (1):
  tools lib traceevent kbuffer: Remove extra update to data pointer in
    PADDING

Sudip Mukherjee (1):
  staging: panel: fix lcd type

Takashi Iwai (4):
  ALSA: emux: Fix mutex deadlock at unloading
  ALSA: emux: Fix mutex deadlock in OSS emulation
  ALSA: emu10k1: Fix card shortname string buffer overflow
  ALSA: hda - Fix mute-LED fixed mode

Takeshi Kihara (1):
  mmc: sh_mmcif: Fix timeout value for command request

Tejun Heo (1):
  writeback: use |1 instead of +1 to protect against div by zero

Thomas D (1):
  tools/power turbostat: Use $(CURDIR) instead of $(PWD) and add support
    for O= option in Makefile

Ulf Hansson (3):
  ARM: ux500: Move GPIO regulator for SD-card into board DTSs
  ARM: ux500: Enable GPIO regulator for SD-card for HREF boards
  ARM: ux500: Enable GPIO regulator for SD-card for snowball

Ulrik De Bie (1):
  Input: elantech - fix absolute mode setting on some ASUS laptops

Vineet Gupta (1):
  ARC: signal handling robustify

Vutla, Lokesh (1):
  crypto: omap-aes - Fix support for unequal lengths

Yann Droneaud (2):
  IB/core: disallow registering 0-sized memory region
  IB/core: don't disallow registering region starting at 0x0

hujianyang (1):
  UBI: fix soft lockup in ubi_check_volume()

mancha security (1):
  lib: memzero_explicit: use barrier instead of OPTIMIZER_HIDE_VAR

 .../devicetree/bindings/dma/fsl-mxs-dma.txt        |   2 +-
 arch/arc/kernel/signal.c                           |  20 +++-
 arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts   |   4 +
 arch/arm/boot/dts/dove.dtsi                        |   4 +-
 arch/arm/boot/dts/imx23-olinuxino.dts              |   4 +-
 arch/arm/boot/dts/imx25.dtsi                       |   1 +
 arch/arm/boot/dts/imx28.dtsi                       |   2 +-
 arch/arm/boot/dts/ste-dbx5x0.dtsi                  |  17 ----
 arch/arm/boot/dts/ste-href.dtsi                    |  15 +++
 arch/arm/boot/dts/ste-snowball.dts                 |  13 ++-
 arch/arm/include/asm/elf.h                         |   2 +-
 arch/arm/mach-s3c64xx/crag6410.h                   |   1 +
 arch/arm/mach-s3c64xx/mach-crag6410.c              |   1 +
 arch/arm64/kernel/vdso/Makefile                    |   2 +-
 arch/c6x/kernel/time.c                             |   2 +-
 arch/mips/include/asm/suspend.h                    |   7 --
 arch/mips/power/cpu.c                              |   2 +-
 arch/mips/power/hibernate.S                        |   3 +-
 arch/powerpc/kernel/cacheinfo.c                    |  44 +++++++--
 arch/powerpc/kernel/suspend.c                      |   4 +-
 arch/powerpc/perf/callchain.c                      |   2 +-
 arch/s390/kernel/suspend.c                         |  10 +-
 arch/s390/kvm/priv.c                               |   1 +
 arch/sh/include/asm/sections.h                     |   1 -
 arch/sparc/power/hibernate.c                       |   4 +-
 arch/unicore32/include/mach/pm.h                   |   3 -
 arch/unicore32/kernel/hibernate.c                  |   1 +
 arch/x86/kernel/process.c                          |  49 ++++++++++
 arch/x86/power/hibernate_32.c                      |   4 +-
 arch/x86/power/hibernate_64.c                      |   4 +-
 arch/xtensa/Kconfig                                |  30 ++++++
 arch/xtensa/include/uapi/asm/unistd.h              |   2 +-
 arch/xtensa/platforms/iss/network.c                |  31 +++---
 arch/xtensa/platforms/xtfpga/Makefile              |   3 +-
 .../platforms/xtfpga/include/platform/hardware.h   |   3 -
 .../xtensa/platforms/xtfpga/include/platform/lcd.h |  15 +++
 arch/xtensa/platforms/xtfpga/lcd.c                 |  55 ++++++-----
 drivers/acpi/acpica/acmacros.h                     |  10 +-
 drivers/acpi/acpica/dsopcode.c                     |   7 +-
 drivers/acpi/acpica/evregion.c                     |   2 +-
 drivers/acpi/acpica/exdump.c                       |   4 +-
 drivers/acpi/acpica/exfldio.c                      |  10 +-
 drivers/acpi/acpica/exregion.c                     |   8 +-
 drivers/acpi/acpica/hwvalid.c                      |  16 ++--
 drivers/acpi/acpica/nsdump.c                       |  12 +--
 drivers/acpi/acpica/tbinstal.c                     |   5 +-
 drivers/acpi/acpica/tbprint.c                      |  17 ++--
 drivers/acpi/acpica/tbutils.c                      |   4 +-
 drivers/acpi/acpica/tbxfload.c                     |   7 +-
 drivers/acpi/acpica/tbxfroot.c                     |   7 +-
 drivers/acpi/acpica/utaddress.c                    |  24 +++--
 drivers/base/bus.c                                 |   4 +-
 drivers/block/rbd.c                                |   5 +
 drivers/bluetooth/ath3k.c                          |   1 +
 drivers/bluetooth/btusb.c                          |   1 +
 drivers/crypto/omap-aes.c                          |  14 ++-
 drivers/gpio/gpio-mvebu.c                          |  24 +++--
 drivers/gpio/gpiolib.c                             |  24 ++++-
 drivers/gpu/drm/i915/i915_reg.h                    |   1 +
 drivers/gpu/drm/i915/intel_i2c.c                   |  66 +++++++++++--
 drivers/gpu/drm/i915/intel_lvds.c                  |  18 +++-
 drivers/gpu/drm/radeon/atombios_crtc.c             |   8 +-
 drivers/gpu/drm/radeon/radeon_asic.c               |   2 +-
 drivers/gpu/drm/radeon/radeon_asic.h               |   4 +
 drivers/gpu/drm/radeon/radeon_uvd.c                | 105 +++++++++++++++------
 drivers/gpu/drm/radeon/rv770d.h                    |   3 +
 drivers/gpu/drm/radeon/si_dpm.c                    |   1 +
 drivers/gpu/drm/radeon/uvd_v1_0.c                  |  11 +--
 drivers/gpu/drm/radeon/uvd_v2_2.c                  |  29 ++++++
 drivers/hv/channel.c                               |   7 +-
 drivers/hv/channel_mgmt.c                          |  12 +--
 drivers/i2c/i2c-core.c                             |   3 +
 drivers/infiniband/core/cma.c                      |  27 ++++--
 drivers/infiniband/core/umem.c                     |   7 +-
 drivers/infiniband/hw/mlx4/qp.c                    |   3 +-
 drivers/input/mouse/elantech.c                     |  22 +++++
 drivers/input/mouse/elantech.h                     |   1 +
 drivers/media/usb/stk1160/stk1160-v4l.c            |  17 +++-
 drivers/memstick/core/mspro_block.c                |   3 +-
 drivers/mmc/card/block.c                           |  12 +++
 drivers/mmc/card/queue.c                           |   2 +-
 drivers/mmc/card/queue.h                           |   2 +
 drivers/mmc/core/core.c                            |   1 +
 drivers/mmc/host/sh_mmcif.c                        |   2 +-
 drivers/mtd/ubi/attach.c                           |   2 +-
 drivers/mtd/ubi/cdev.c                             |   2 +-
 drivers/mtd/ubi/eba.c                              |   3 +-
 drivers/mtd/ubi/misc.c                             |   2 +
 drivers/mtd/ubi/wl.c                               |   2 +-
 drivers/net/ethernet/intel/e1000/e1000_main.c      |  10 +-
 drivers/net/wireless/rtlwifi/rtl8192cu/sw.c        |   2 +
 drivers/net/wireless/ti/wl18xx/debugfs.c           |   2 +-
 drivers/net/wireless/ti/wlcore/debugfs.h           |   4 +-
 drivers/parport/Kconfig                            |   2 +-
 drivers/pinctrl/core.c                             |  10 +-
 drivers/pinctrl/core.h                             |   2 +-
 drivers/pinctrl/devicetree.c                       |   2 +-
 drivers/platform/x86/compal-laptop.c               |   8 +-
 drivers/power/lp8788-charger.c                     |   4 +-
 drivers/power/twl4030_madc_battery.c               |   7 +-
 drivers/scsi/3w-9xxx.c                             |  57 +++--------
 drivers/scsi/3w-9xxx.h                             |   5 -
 drivers/scsi/3w-sas.c                              |  50 ++--------
 drivers/scsi/3w-sas.h                              |   4 -
 drivers/scsi/3w-xxxx.c                             |  42 ++-------
 drivers/scsi/3w-xxxx.h                             |   5 -
 drivers/scsi/mvsas/mv_sas.c                        |   5 +-
 drivers/scsi/storvsc_drv.c                         |  15 +--
 drivers/spi/spidev.c                               |   5 +-
 drivers/staging/dwc2/hcd.c                         |   2 +-
 drivers/staging/panel/panel.c                      |  13 ++-
 drivers/target/target_core_sbc.c                   |  15 ++-
 drivers/target/target_core_transport.c             |  37 +++++++-
 drivers/tty/hvc/hvc_xen.c                          |  18 +++-
 drivers/tty/serial/atmel_serial.c                  |   2 +
 drivers/tty/serial/of_serial.c                     |   1 -
 drivers/usb/class/cdc-wdm.c                        |  12 ++-
 drivers/usb/core/hub.c                             |   4 +-
 drivers/usb/gadget/composite.c                     |   2 +-
 drivers/usb/gadget/printer.c                       |   9 ++
 drivers/usb/host/ehci-hcd.c                        |  10 +-
 drivers/usb/host/ehci-hub.c                        |   9 +-
 drivers/usb/host/fotg210-hcd.c                     |   2 +-
 drivers/usb/host/fusbh200-hcd.c                    |   3 +-
 drivers/usb/host/isp116x-hcd.c                     |   2 +-
 drivers/usb/host/oxu210hp-hcd.c                    |   7 +-
 drivers/usb/host/r8a66597-hcd.c                    |   2 +-
 drivers/usb/host/sl811-hcd.c                       |   2 +-
 drivers/usb/host/uhci-hub.c                        |   5 +-
 drivers/usb/host/xhci-ring.c                       |   2 +-
 drivers/usb/musb/musb_core.c                       |   3 +-
 drivers/usb/musb/musb_virthub.c                    |   2 +-
 drivers/usb/phy/phy.c                              |   4 +-
 fs/binfmt_elf.c                                    |   9 +-
 fs/btrfs/extent-tree.c                             |   5 +-
 fs/btrfs/ioctl.c                                   |   8 ++
 fs/btrfs/xattr.c                                   |  50 +++++++---
 fs/exec.c                                          |  76 +++++++++------
 fs/ext4/extents_status.c                           |   8 ++
 fs/ext4/inode.c                                    |   2 +
 fs/ext4/namei.c                                    |  20 ++--
 fs/namei.c                                         |   6 +-
 fs/namespace.c                                     |   6 ++
 fs/nilfs2/btree.c                                  |   2 +-
 fs/ocfs2/dlm/dlmmaster.c                           |  13 +++
 fs/proc/stat.c                                     |  22 +----
 fs/seq_file.c                                      |  33 +++++--
 include/acpi/acpixf.h                              |   2 +-
 include/acpi/actypes.h                             |  20 ++++
 include/acpi/platform/acenv.h                      |   1 +
 include/asm-generic/pgtable.h                      |   5 +-
 include/asm-generic/sections.h                     |   4 +
 include/linux/nilfs2_fs.h                          |   2 +-
 include/linux/rmap.h                               |  10 ++
 include/linux/skbuff.h                             |   1 +
 include/linux/usb.h                                |  26 +++++
 include/sound/emu10k1.h                            |  14 ++-
 include/sound/soc-dapm.h                           |   2 +-
 include/target/target_core_base.h                  |   2 +-
 kernel/ptrace.c                                    |  20 ++++
 kernel/softirq.c                                   |   6 +-
 kernel/trace/ring_buffer.c                         |  11 +--
 lib/string.c                                       |   2 +-
 mm/hugetlb.c                                       |   3 +-
 mm/memory-failure.c                                |  16 ++--
 mm/mmap.c                                          |   2 +-
 mm/page-writeback.c                                |   6 +-
 mm/rmap.c                                          |  49 +++++++++-
 net/core/skbuff.c                                  |  30 ++++--
 net/ipv4/ip_forward.c                              |   3 +
 net/ipv4/ping.c                                    |   1 +
 net/ipv4/tcp_output.c                              |  64 +++++++++----
 net/netlink/af_netlink.c                           |   6 +-
 sound/oss/sequencer.c                              |  12 +--
 sound/pci/emu10k1/emu10k1.c                        |   6 +-
 sound/pci/emu10k1/emu10k1_callback.c               |   4 +-
 sound/pci/emu10k1/emu10k1_main.c                   |  21 +++--
 sound/pci/emu10k1/emupcm.c                         |   2 +-
 sound/pci/emu10k1/emuproc.c                        |  12 ---
 sound/pci/emu10k1/memory.c                         |  11 ++-
 sound/pci/hda/hda_codec.c                          |  21 +++--
 sound/synth/emux/emux_oss.c                        |  11 +--
 sound/synth/emux/emux_seq.c                        |  29 ++++--
 tools/lib/traceevent/kbuffer-parse.c               |   1 -
 tools/power/x86/turbostat/Makefile                 |   6 +-
 virt/kvm/kvm_main.c                                |   4 +-
 186 files changed, 1344 insertions(+), 727 deletions(-)
 delete mode 100644 arch/mips/include/asm/suspend.h

-- 
2.3.7

[PATCH 3.12 089/142] ALSA: emu10k1: Emu10k2 32 bit DMA mode

[Jiri Slaby]

From: Peter Zubaj <pzubaj@marticonet.sk>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 7241ea558c6715501e777396b5fc312c372e11d9 upstream.

Looks like audigy emu10k2 (probably emu10k1 - sb live too) support two
modes for DMA. Second mode is useful for 64 bit os with more then 2 GB
of ram (fixes problems with big soundfont loading)

1) 32MB from 2 GB address space using 8192 pages (used now as default)
2) 16MB from 4 GB address space using 4096 pages

Mode is set using HCFG_EXPANDED_MEM flag in HCFG register.
Also format of emu10k2 page table is then different.

Signed-off-by: Peter Zubaj <pzubaj@marticonet.sk>
Tested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 include/sound/emu10k1.h              | 14 +++++++++-----
 sound/pci/emu10k1/emu10k1_callback.c |  4 ++--
 sound/pci/emu10k1/emu10k1_main.c     | 17 ++++++++++++-----
 sound/pci/emu10k1/emupcm.c           |  2 +-
 sound/pci/emu10k1/memory.c           | 11 ++++++-----
 5 files changed, 30 insertions(+), 18 deletions(-)

diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h
index dfb42ca6d043..8898cdeb42a4 100644
--- a/include/sound/emu10k1.h
+++ b/include/sound/emu10k1.h
@@ -41,7 +41,8 @@
 
 #define EMUPAGESIZE     4096
 #define MAXREQVOICES    8
-#define MAXPAGES        8192
+#define MAXPAGES0       4096	/* 32 bit mode */
+#define MAXPAGES1       8192	/* 31 bit mode */
 #define RESERVED        0
 #define NUM_MIDI        16
 #define NUM_G           64              /* use all channels */
@@ -50,8 +51,7 @@
 
 /* FIXME? - according to the OSS driver the EMU10K1 needs a 29 bit DMA mask */
 #define EMU10K1_DMA_MASK	0x7fffffffUL	/* 31bit */
-#define AUDIGY_DMA_MASK		0x7fffffffUL	/* 31bit FIXME - 32 should work? */
-						/* See ALSA bug #1276 - rlrevell */
+#define AUDIGY_DMA_MASK		0xffffffffUL	/* 32bit mode */
 
 #define TMEMSIZE        256*1024
 #define TMEMSIZEREG     4
@@ -468,8 +468,11 @@
 
 #define MAPB			0x0d		/* Cache map B						*/
 
-#define MAP_PTE_MASK		0xffffe000	/* The 19 MSBs of the PTE indexed by the PTI		*/
-#define MAP_PTI_MASK		0x00001fff	/* The 13 bit index to one of the 8192 PTE dwords      	*/
+#define MAP_PTE_MASK0		0xfffff000	/* The 20 MSBs of the PTE indexed by the PTI		*/
+#define MAP_PTI_MASK0		0x00000fff	/* The 12 bit index to one of the 4096 PTE dwords      	*/
+
+#define MAP_PTE_MASK1		0xffffe000	/* The 19 MSBs of the PTE indexed by the PTI		*/
+#define MAP_PTI_MASK1		0x00001fff	/* The 13 bit index to one of the 8192 PTE dwords      	*/
 
 /* 0x0e, 0x0f: Not used */
 
@@ -1706,6 +1709,7 @@ struct snd_emu10k1 {
 	unsigned short model;			/* subsystem id */
 	unsigned int card_type;			/* EMU10K1_CARD_* */
 	unsigned int ecard_ctrl;		/* ecard control bits */
+	unsigned int address_mode;		/* address mode */
 	unsigned long dma_mask;			/* PCI DMA mask */
 	unsigned int delay_pcm_irq;		/* in samples */
 	int max_cache_pages;			/* max memory size / PAGE_SIZE */
diff --git a/sound/pci/emu10k1/emu10k1_callback.c b/sound/pci/emu10k1/emu10k1_callback.c
index 0a34b5f1c475..f8a6549f00e5 100644
--- a/sound/pci/emu10k1/emu10k1_callback.c
+++ b/sound/pci/emu10k1/emu10k1_callback.c
@@ -415,7 +415,7 @@ start_voice(struct snd_emux_voice *vp)
 	snd_emu10k1_ptr_write(hw, Z2, ch, 0);
 
 	/* invalidate maps */
-	temp = (hw->silent_page.addr << 1) | MAP_PTI_MASK;
+	temp = (hw->silent_page.addr << hw->address_mode) | (hw->address_mode ? MAP_PTI_MASK1 : MAP_PTI_MASK0);
 	snd_emu10k1_ptr_write(hw, MAPA, ch, temp);
 	snd_emu10k1_ptr_write(hw, MAPB, ch, temp);
 #if 0
@@ -436,7 +436,7 @@ start_voice(struct snd_emux_voice *vp)
 		snd_emu10k1_ptr_write(hw, CDF, ch, sample);
 
 		/* invalidate maps */
-		temp = ((unsigned int)hw->silent_page.addr << 1) | MAP_PTI_MASK;
+		temp = ((unsigned int)hw->silent_page.addr << hw_address_mode) | (hw->address_mode ? MAP_PTI_MASK1 : MAP_PTI_MASK0);
 		snd_emu10k1_ptr_write(hw, MAPA, ch, temp);
 		snd_emu10k1_ptr_write(hw, MAPB, ch, temp);
 		
diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c
index 134b7cf95ad4..a131092572e6 100644
--- a/sound/pci/emu10k1/emu10k1_main.c
+++ b/sound/pci/emu10k1/emu10k1_main.c
@@ -282,7 +282,7 @@ static int snd_emu10k1_init(struct snd_emu10k1 *emu, int enable_ir, int resume)
 	snd_emu10k1_ptr_write(emu, TCB, 0, 0);	/* taken from original driver */
 	snd_emu10k1_ptr_write(emu, TCBS, 0, 4);	/* taken from original driver */
 
-	silent_page = (emu->silent_page.addr << 1) | MAP_PTI_MASK;
+	silent_page = (emu->silent_page.addr << emu->address_mode) | (emu->address_mode ? MAP_PTI_MASK1 : MAP_PTI_MASK0);
 	for (ch = 0; ch < NUM_G; ch++) {
 		snd_emu10k1_ptr_write(emu, MAPA, ch, silent_page);
 		snd_emu10k1_ptr_write(emu, MAPB, ch, silent_page);
@@ -348,6 +348,11 @@ static int snd_emu10k1_init(struct snd_emu10k1 *emu, int enable_ir, int resume)
 		outl(reg | A_IOCFG_GPOUT0, emu->port + A_IOCFG);
 	}
 
+	if (emu->address_mode == 0) {
+		/* use 16M in 4G */
+		outl(inl(emu->port + HCFG) | HCFG_EXPANDED_MEM, emu->port + HCFG);
+	}
+
 	return 0;
 }
 
@@ -1865,8 +1870,10 @@ int snd_emu10k1_create(struct snd_card *card,
 
 	is_audigy = emu->audigy = c->emu10k2_chip;
 
+	/* set addressing mode */
+	emu->address_mode = is_audigy ? 0 : 1;
 	/* set the DMA transfer mask */
-	emu->dma_mask = is_audigy ? AUDIGY_DMA_MASK : EMU10K1_DMA_MASK;
+	emu->dma_mask = emu->address_mode ? EMU10K1_DMA_MASK : AUDIGY_DMA_MASK;
 	if (pci_set_dma_mask(pci, emu->dma_mask) < 0 ||
 	    pci_set_consistent_dma_mask(pci, emu->dma_mask) < 0) {
 		snd_printk(KERN_ERR "architecture does not support PCI busmaster DMA with mask 0x%lx\n", emu->dma_mask);
@@ -1889,7 +1896,7 @@ int snd_emu10k1_create(struct snd_card *card,
 
 	emu->max_cache_pages = max_cache_bytes >> PAGE_SHIFT;
 	if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
-				32 * 1024, &emu->ptb_pages) < 0) {
+				(emu->address_mode ? 32 : 16) * 1024, &emu->ptb_pages) < 0) {
 		err = -ENOMEM;
 		goto error;
 	}
@@ -1988,8 +1995,8 @@ int snd_emu10k1_create(struct snd_card *card,
 
 	/* Clear silent pages and set up pointers */
 	memset(emu->silent_page.area, 0, PAGE_SIZE);
-	silent_page = emu->silent_page.addr << 1;
-	for (idx = 0; idx < MAXPAGES; idx++)
+	silent_page = emu->silent_page.addr << emu->address_mode;
+	for (idx = 0; idx < (emu->address_mode ? MAXPAGES1 : MAXPAGES0); idx++)
 		((u32 *)emu->ptb_pages.area)[idx] = cpu_to_le32(silent_page | idx);
 
 	/* set up voice indices */
diff --git a/sound/pci/emu10k1/emupcm.c b/sound/pci/emu10k1/emupcm.c
index 5ae1d045bdcb..7581019d7c84 100644
--- a/sound/pci/emu10k1/emupcm.c
+++ b/sound/pci/emu10k1/emupcm.c
@@ -379,7 +379,7 @@ static void snd_emu10k1_pcm_init_voice(struct snd_emu10k1 *emu,
 	snd_emu10k1_ptr_write(emu, Z1, voice, 0);
 	snd_emu10k1_ptr_write(emu, Z2, voice, 0);
 	/* invalidate maps */
-	silent_page = ((unsigned int)emu->silent_page.addr << 1) | MAP_PTI_MASK;
+	silent_page = ((unsigned int)emu->silent_page.addr << emu->address_mode) | (emu->address_mode ? MAP_PTI_MASK1 : MAP_PTI_MASK0);
 	snd_emu10k1_ptr_write(emu, MAPA, voice, silent_page);
 	snd_emu10k1_ptr_write(emu, MAPB, voice, silent_page);
 	/* modulation envelope */
diff --git a/sound/pci/emu10k1/memory.c b/sound/pci/emu10k1/memory.c
index ae709c1ab3a8..d514458efe3d 100644
--- a/sound/pci/emu10k1/memory.c
+++ b/sound/pci/emu10k1/memory.c
@@ -34,10 +34,11 @@
  * aligned pages in others
  */
 #define __set_ptb_entry(emu,page,addr) \
-	(((u32 *)(emu)->ptb_pages.area)[page] = cpu_to_le32(((addr) << 1) | (page)))
+	(((u32 *)(emu)->ptb_pages.area)[page] = cpu_to_le32(((addr) << (emu->address_mode)) | (page)))
 
 #define UNIT_PAGES		(PAGE_SIZE / EMUPAGESIZE)
-#define MAX_ALIGN_PAGES		(MAXPAGES / UNIT_PAGES)
+#define MAX_ALIGN_PAGES0		(MAXPAGES0 / UNIT_PAGES)
+#define MAX_ALIGN_PAGES1		(MAXPAGES1 / UNIT_PAGES)
 /* get aligned page from offset address */
 #define get_aligned_page(offset)	((offset) >> PAGE_SHIFT)
 /* get offset address from aligned page */
@@ -124,7 +125,7 @@ static int search_empty_map_area(struct snd_emu10k1 *emu, int npages, struct lis
 		}
 		page = blk->mapped_page + blk->pages;
 	}
-	size = MAX_ALIGN_PAGES - page;
+	size = (emu->address_mode ? MAX_ALIGN_PAGES1 : MAX_ALIGN_PAGES0) - page;
 	if (size >= max_size) {
 		*nextp = pos;
 		return page;
@@ -181,7 +182,7 @@ static int unmap_memblk(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk)
 		q = get_emu10k1_memblk(p, mapped_link);
 		end_page = q->mapped_page;
 	} else
-		end_page = MAX_ALIGN_PAGES;
+		end_page = (emu->address_mode ? MAX_ALIGN_PAGES1 : MAX_ALIGN_PAGES0);
 
 	/* remove links */
 	list_del(&blk->mapped_link);
@@ -305,7 +306,7 @@ snd_emu10k1_alloc_pages(struct snd_emu10k1 *emu, struct snd_pcm_substream *subst
 	if (snd_BUG_ON(!emu))
 		return NULL;
 	if (snd_BUG_ON(runtime->dma_bytes <= 0 ||
-		       runtime->dma_bytes >= MAXPAGES * EMUPAGESIZE))
+		       runtime->dma_bytes >= (emu->address_mode ? MAXPAGES1 : MAXPAGES0) * EMUPAGESIZE))
 		return NULL;
 	hdr = emu->memhdr;
 	if (snd_BUG_ON(!hdr))
-- 
2.3.7

[PATCH 3.12 090/142] ALSA: hda - Fix mute-LED fixed mode

[Jiri Slaby]

From: Takashi Iwai <tiwai@suse.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit ee52e56e7b12834476cd0031c5986254ba1b6317 upstream.

The mute-LED mode control has the fixed on/off states that are
supposed to remain on/off regardless of the master switch.  However,
this doesn't work actually because the vmaster hook is called in the
vmaster code itself.

This patch fixes it by calling the hook indirectly after checking the
mute LED mode.

Reported-and-tested-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 sound/pci/hda/hda_codec.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index fed93cb2ee2f..931bd7386326 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -2012,6 +2012,16 @@ static void put_vol_mute(struct hda_codec *codec, unsigned int amp_caps,
 	snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_AMP_GAIN_MUTE, parm);
 }
 
+/* meta hook to call each driver's vmaster hook */
+static void vmaster_hook(void *private_data, int enabled)
+{
+	struct hda_vmaster_mute_hook *hook = private_data;
+
+	if (hook->mute_mode != HDA_VMUTE_FOLLOW_MASTER)
+		enabled = hook->mute_mode;
+	hook->hook(hook->codec, enabled);
+}
+
 /**
  * snd_hda_codec_amp_read - Read AMP value
  * @codec: HD-audio codec
@@ -2834,9 +2844,9 @@ int snd_hda_add_vmaster_hook(struct hda_codec *codec,
 
 	if (!hook->hook || !hook->sw_kctl)
 		return 0;
-	snd_ctl_add_vmaster_hook(hook->sw_kctl, hook->hook, codec);
 	hook->codec = codec;
 	hook->mute_mode = HDA_VMUTE_FOLLOW_MASTER;
+	snd_ctl_add_vmaster_hook(hook->sw_kctl, vmaster_hook, hook);
 	if (!expose_enum_ctl)
 		return 0;
 	kctl = snd_ctl_new1(&vmaster_mute_mode, hook);
@@ -2859,14 +2869,7 @@ void snd_hda_sync_vmaster_hook(struct hda_vmaster_mute_hook *hook)
 	 */
 	if (hook->codec->bus->shutdown)
 		return;
-	switch (hook->mute_mode) {
-	case HDA_VMUTE_FOLLOW_MASTER:
-		snd_ctl_sync_vmaster_hook(hook->sw_kctl);
-		break;
-	default:
-		hook->hook(hook->codec, hook->mute_mode);
-		break;
-	}
+	snd_ctl_sync_vmaster_hook(hook->sw_kctl);
 }
 EXPORT_SYMBOL_HDA(snd_hda_sync_vmaster_hook);
 
-- 
2.3.7

[PATCH 3.12 091/142] serial: of-serial: Remove device_type = "serial" registration

[Jiri Slaby]

From: Michal Simek <michal.simek@xilinx.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 6befa9d883385c580369a2cc9e53fbf329771f6d upstream.

Do not probe all serial drivers by of_serial.c which are using
device_type = "serial"; property. Only drivers which have valid
compatible strings listed in the driver should be probed.

When PORT_UNKNOWN is setup probe will fail anyway.

Arnd quotation about driver historical background:
"when I wrote that driver initially, the idea was that it would
get used as a stub to hook up all other serial drivers but after
that, the common code learned to create platform devices from DT"

This patch fix the problem with on the system with xilinx_uartps and
16550a where of_serial failed to register for xilinx_uartps and because
of irq_dispose_mapping() removed irq_desc. Then when xilinx_uartps was asking
for irq with request_irq() EINVAL is returned.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/tty/serial/of_serial.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index 2caf9c6f6149..d666517288aa 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -262,7 +262,6 @@ static struct of_device_id of_platform_serial_table[] = {
 	{ .compatible = "ibm,qpace-nwp-serial",
 		.data = (void *)PORT_NWPSERIAL, },
 #endif
-	{ .type = "serial",         .data = (void *)PORT_UNKNOWN, },
 	{ /* end of list */ },
 };
 
-- 
2.3.7

[PATCH 3.12 092/142] ASoC: dapm: Enable autodisable on SOC_DAPM_SINGLE_TLV_AUTODISABLE

[Jiri Slaby]

From: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit a2d97723cb3a7741af81868427b36bba274b681b upstream.

Correct small copy and paste error where autodisable was not being
enabled for the SOC_DAPM_SINGLE_TLV_AUTODISABLE control.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 include/sound/soc-dapm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 9e600b418467..11a6d2d68914 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -300,7 +300,7 @@ struct device;
 	.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_READWRITE,\
 	.tlv.p = (tlv_array), \
 	.get = snd_soc_dapm_get_volsw, .put = snd_soc_dapm_put_volsw, \
-	.private_value = SOC_SINGLE_VALUE(reg, shift, max, invert, 0) }
+	.private_value = SOC_SINGLE_VALUE(reg, shift, max, invert, 1) }
 #define SOC_DAPM_ENUM(xname, xenum) \
 {	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 	.info = snd_soc_info_enum_double, \
-- 
2.3.7

[PATCH 3.12 093/142] tty/serial: at91: maxburst was missing for dma transfers

[Jiri Slaby]

From: Ludovic Desroches <ludovic.desroches@atmel.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit a8d4e01637902311c5643b69a5c80e2805f04054 upstream.

Maxburst was not set when doing the dma slave configuration. This value
is checked by the recently introduced xdmac. It causes an error when
doing the slave configuration and so prevents from using dma.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/tty/serial/atmel_serial.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index ebdc00f184a1..ab2e22bf54fd 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -756,6 +756,7 @@ static int atmel_prepare_tx_dma(struct uart_port *port)
 	config.direction = DMA_MEM_TO_DEV;
 	config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
 	config.dst_addr = port->mapbase + ATMEL_US_THR;
+	config.dst_maxburst = 1;
 
 	ret = dmaengine_device_control(atmel_port->chan_tx,
 					DMA_SLAVE_CONFIG,
@@ -920,6 +921,7 @@ static int atmel_prepare_rx_dma(struct uart_port *port)
 	config.direction = DMA_DEV_TO_MEM;
 	config.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
 	config.src_addr = port->mapbase + ATMEL_US_RHR;
+	config.src_maxburst = 1;
 
 	ret = dmaengine_device_control(atmel_port->chan_rx,
 					DMA_SLAVE_CONFIG,
-- 
2.3.7

[PATCH 3.12 094/142] rbd: end I/O the entire obj_request on error

[Jiri Slaby]

From: Ilya Dryomov <idryomov@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 082a75dad84d79d1c15ea9e50f31cb4bb4fa7fd6 upstream.

When we end I/O struct request with error, we need to pass
obj_request->length as @nr_bytes so that the entire obj_request worth
of bytes is completed.  Otherwise block layer ends up confused and we
trip on

    rbd_assert(more ^ (which == img_request->obj_request_count));

in rbd_img_obj_callback() due to more being true no matter what.  We
already do it in most cases but we are missing some, in particular
those where we don't even get a chance to submit any obj_requests, due
to an early -ENOMEM for example.

A number of obj_request->xferred assignments seem to be redundant but
I haven't touched any of obj_request->xferred stuff to keep this small
and isolated.

Cc: Alex Elder <elder@linaro.org>
Reported-by: Shawn Edwards <lesser.evil@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/block/rbd.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 2eb4458f4ba8..78bfd5021827 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -2103,6 +2103,11 @@ static bool rbd_img_obj_end_request(struct rbd_obj_request *obj_request)
 			result, xferred);
 		if (!img_request->result)
 			img_request->result = result;
+		/*
+		 * Need to end I/O on the entire obj_request worth of
+		 * bytes in case of error.
+		 */
+		xferred = obj_request->length;
 	}
 
 	/* Image object requests don't own their page array */
-- 
2.3.7

[PATCH 3.12 095/142] ext4: fix data corruption caused by unwritten and delayed extents

[Jiri Slaby]

From: Lukas Czerner <lczerner@redhat.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit d2dc317d564a46dfc683978a2e5a4f91434e9711 upstream.

Currently it is possible to lose whole file system block worth of data
when we hit the specific interaction with unwritten and delayed extents
in status extent tree.

The problem is that when we insert delayed extent into extent status
tree the only way to get rid of it is when we write out delayed buffer.
However there is a limitation in the extent status tree implementation
so that when inserting unwritten extent should there be even a single
delayed block the whole unwritten extent would be marked as delayed.

At this point, there is no way to get rid of the delayed extents,
because there are no delayed buffers to write out. So when a we write
into said unwritten extent we will convert it to written, but it still
remains delayed.

When we try to write into that block later ext4_da_map_blocks() will set
the buffer new and delayed and map it to invalid block which causes
the rest of the block to be zeroed loosing already written data.

For now we can fix this by simply not allowing to set delayed status on
written extent in the extent status tree. Also add WARN_ON() to make
sure that we notice if this happens in the future.

This problem can be easily reproduced by running the following xfs_io.

xfs_io -f -c "pwrite -S 0xaa 4096 2048" \
          -c "falloc 0 131072" \
          -c "pwrite -S 0xbb 65536 2048" \
          -c "fsync" /mnt/test/fff

echo 3 > /proc/sys/vm/drop_caches
xfs_io -c "pwrite -S 0xdd 67584 2048" /mnt/test/fff

This can be theoretically also reproduced by at random by running fsx,
but it's not very reliable, though on machines with bigger page size
(like ppc) this can be seen more often (especially xfstest generic/127)

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/ext4/extents_status.c | 8 ++++++++
 fs/ext4/inode.c          | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index 171b9fa0f27a..4e8b79def9c7 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -656,6 +656,14 @@ int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk,
 
 	BUG_ON(end < lblk);
 
+	if ((status & EXTENT_STATUS_DELAYED) &&
+	    (status & EXTENT_STATUS_WRITTEN)) {
+		ext4_warning(inode->i_sb, "Inserting extent [%u/%u] as "
+				" delayed and written which can potentially "
+				" cause data loss.\n", lblk, len);
+		WARN_ON(1);
+	}
+
 	newes.es_lblk = lblk;
 	newes.es_len = len;
 	ext4_es_store_pblock(&newes, pblk);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index ba68d211d748..70a390bb4733 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -569,6 +569,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
 		status = map->m_flags & EXT4_MAP_UNWRITTEN ?
 				EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN;
 		if (!(flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) &&
+		    !(status & EXTENT_STATUS_WRITTEN) &&
 		    ext4_find_delalloc_range(inode, map->m_lblk,
 					     map->m_lblk + map->m_len - 1))
 			status |= EXTENT_STATUS_DELAYED;
@@ -678,6 +679,7 @@ found:
 		status = map->m_flags & EXT4_MAP_UNWRITTEN ?
 				EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN;
 		if (!(flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) &&
+		    !(status & EXTENT_STATUS_WRITTEN) &&
 		    ext4_find_delalloc_range(inode, map->m_lblk,
 					     map->m_lblk + map->m_len - 1))
 			status |= EXTENT_STATUS_DELAYED;
-- 
2.3.7

[PATCH 3.12 096/142] 3w-xxxx: fix command completion race

[Jiri Slaby]

From: Christoph Hellwig <hch@lst.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 9cd9554615cba14f0877cc9972a6537ad2bdde61 upstream.

The 3w-xxxx driver needs to tear down the dma mappings before returning
the command to the midlayer, as there is no guarantee the sglist and
count are valid after that point.  Also remove the dma mapping helpers
which have another inherent race due to the request_id index.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/scsi/3w-xxxx.c | 42 ++++++------------------------------------
 drivers/scsi/3w-xxxx.h |  5 -----
 2 files changed, 6 insertions(+), 41 deletions(-)

diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c
index 752624e6bc00..b327742b95ef 100644
--- a/drivers/scsi/3w-xxxx.c
+++ b/drivers/scsi/3w-xxxx.c
@@ -1284,32 +1284,6 @@ static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
 	return 0;
 } /* End tw_initialize_device_extension() */
 
-static int tw_map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
-{
-	int use_sg;
-
-	dprintk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data()\n");
-
-	use_sg = scsi_dma_map(cmd);
-	if (use_sg < 0) {
-		printk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data(): pci_map_sg() failed.\n");
-		return 0;
-	}
-
-	cmd->SCp.phase = TW_PHASE_SGLIST;
-	cmd->SCp.have_data_in = use_sg;
-
-	return use_sg;
-} /* End tw_map_scsi_sg_data() */
-
-static void tw_unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
-{
-	dprintk(KERN_WARNING "3w-xxxx: tw_unmap_scsi_data()\n");
-
-	if (cmd->SCp.phase == TW_PHASE_SGLIST)
-		scsi_dma_unmap(cmd);
-} /* End tw_unmap_scsi_data() */
-
 /* This function will reset a device extension */
 static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
 {
@@ -1332,8 +1306,8 @@ static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
 			srb = tw_dev->srb[i];
 			if (srb != NULL) {
 				srb->result = (DID_RESET << 16);
-				tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
-				tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[i]);
+				scsi_dma_unmap(srb);
+				srb->scsi_done(srb);
 			}
 		}
 	}
@@ -1780,8 +1754,8 @@ static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
 	command_packet->byte8.io.lba = lba;
 	command_packet->byte6.block_count = num_sectors;
 
-	use_sg = tw_map_scsi_sg_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
-	if (!use_sg)
+	use_sg = scsi_dma_map(srb);
+	if (use_sg <= 0)
 		return 1;
 
 	scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) {
@@ -1968,9 +1942,6 @@ static int tw_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_c
 	/* Save the scsi command for use by the ISR */
 	tw_dev->srb[request_id] = SCpnt;
 
-	/* Initialize phase to zero */
-	SCpnt->SCp.phase = TW_PHASE_INITIAL;
-
 	switch (*command) {
 		case READ_10:
 		case READ_6:
@@ -2198,12 +2169,11 @@ static irqreturn_t tw_interrupt(int irq, void *dev_instance)
 
 				/* Now complete the io */
 				if ((error != TW_ISR_DONT_COMPLETE)) {
+					scsi_dma_unmap(tw_dev->srb[request_id]);
+					tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
 					tw_dev->state[request_id] = TW_S_COMPLETED;
 					tw_state_request_finish(tw_dev, request_id);
 					tw_dev->posted_request_count--;
-					tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
-					
-					tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
 				}
 			}
 				
diff --git a/drivers/scsi/3w-xxxx.h b/drivers/scsi/3w-xxxx.h
index 49dcf03c631a..1d31858766ce 100644
--- a/drivers/scsi/3w-xxxx.h
+++ b/drivers/scsi/3w-xxxx.h
@@ -195,11 +195,6 @@ static unsigned char tw_sense_table[][4] =
 #define TW_AEN_SMART_FAIL        0x000F
 #define TW_AEN_SBUF_FAIL         0x0024
 
-/* Phase defines */
-#define TW_PHASE_INITIAL 0
-#define TW_PHASE_SINGLE 1
-#define TW_PHASE_SGLIST 2
-
 /* Misc defines */
 #define TW_ALIGNMENT_6000		      64 /* 64 bytes */
 #define TW_ALIGNMENT_7000                     4  /* 4 bytes */
-- 
2.3.7

[PATCH 3.12 097/142] 3w-9xxx: fix command completion race

[Jiri Slaby]

From: Christoph Hellwig <hch@lst.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 118c855b5623f3e2e6204f02623d88c09e0c34de upstream.

The 3w-9xxx driver needs to tear down the dma mappings before returning
the command to the midlayer, as there is no guarantee the sglist and
count are valid after that point.  Also remove the dma mapping helpers
which have another inherent race due to the request_id index.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/scsi/3w-9xxx.c | 57 ++++++++++++--------------------------------------
 drivers/scsi/3w-9xxx.h |  5 -----
 2 files changed, 13 insertions(+), 49 deletions(-)

diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
index 0a7325361d29..5f57e3d35e26 100644
--- a/drivers/scsi/3w-9xxx.c
+++ b/drivers/scsi/3w-9xxx.c
@@ -149,7 +149,6 @@ static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset);
 static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry *sglistarg);
 static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id);
 static char *twa_string_lookup(twa_message_type *table, unsigned int aen_code);
-static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id);
 
 /* Functions */
 
@@ -1352,11 +1351,11 @@ static irqreturn_t twa_interrupt(int irq, void *dev_instance)
 				}
 
 				/* Now complete the io */
+				scsi_dma_unmap(cmd);
+				cmd->scsi_done(cmd);
 				tw_dev->state[request_id] = TW_S_COMPLETED;
 				twa_free_request_id(tw_dev, request_id);
 				tw_dev->posted_request_count--;
-				tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
-				twa_unmap_scsi_data(tw_dev, request_id);
 			}
 
 			/* Check for valid status after each drain */
@@ -1414,26 +1413,6 @@ static void twa_load_sgl(TW_Device_Extension *tw_dev, TW_Command_Full *full_comm
 	}
 } /* End twa_load_sgl() */
 
-/* This function will perform a pci-dma mapping for a scatter gather list */
-static int twa_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id)
-{
-	int use_sg;
-	struct scsi_cmnd *cmd = tw_dev->srb[request_id];
-
-	use_sg = scsi_dma_map(cmd);
-	if (!use_sg)
-		return 0;
-	else if (use_sg < 0) {
-		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to map scatter gather list");
-		return 0;
-	}
-
-	cmd->SCp.phase = TW_PHASE_SGLIST;
-	cmd->SCp.have_data_in = use_sg;
-
-	return use_sg;
-} /* End twa_map_scsi_sg_data() */
-
 /* This function will poll for a response interrupt of a request */
 static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds)
 {
@@ -1612,9 +1591,11 @@ static int twa_reset_device_extension(TW_Device_Extension *tw_dev)
 		    (tw_dev->state[i] != TW_S_INITIAL) &&
 		    (tw_dev->state[i] != TW_S_COMPLETED)) {
 			if (tw_dev->srb[i]) {
-				tw_dev->srb[i]->result = (DID_RESET << 16);
-				tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
-				twa_unmap_scsi_data(tw_dev, i);
+				struct scsi_cmnd *cmd = tw_dev->srb[i];
+
+				cmd->result = (DID_RESET << 16);
+				scsi_dma_unmap(cmd);
+				cmd->scsi_done(cmd);
 			}
 		}
 	}
@@ -1793,21 +1774,18 @@ static int twa_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_
 	/* Save the scsi command for use by the ISR */
 	tw_dev->srb[request_id] = SCpnt;
 
-	/* Initialize phase to zero */
-	SCpnt->SCp.phase = TW_PHASE_INITIAL;
-
 	retval = twa_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
 	switch (retval) {
 	case SCSI_MLQUEUE_HOST_BUSY:
+		scsi_dma_unmap(SCpnt);
 		twa_free_request_id(tw_dev, request_id);
-		twa_unmap_scsi_data(tw_dev, request_id);
 		break;
 	case 1:
-		tw_dev->state[request_id] = TW_S_COMPLETED;
-		twa_free_request_id(tw_dev, request_id);
-		twa_unmap_scsi_data(tw_dev, request_id);
 		SCpnt->result = (DID_ERROR << 16);
+		scsi_dma_unmap(SCpnt);
 		done(SCpnt);
+		tw_dev->state[request_id] = TW_S_COMPLETED;
+		twa_free_request_id(tw_dev, request_id);
 		retval = 0;
 	}
 out:
@@ -1875,8 +1853,8 @@ static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id,
 				command_packet->sg_list[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
 				command_packet->sg_list[0].length = cpu_to_le32(TW_MIN_SGL_LENGTH);
 			} else {
-				sg_count = twa_map_scsi_sg_data(tw_dev, request_id);
-				if (sg_count == 0)
+				sg_count = scsi_dma_map(srb);
+				if (sg_count < 0)
 					goto out;
 
 				scsi_for_each_sg(srb, sg, sg_count, i) {
@@ -1991,15 +1969,6 @@ static char *twa_string_lookup(twa_message_type *table, unsigned int code)
 	return(table[index].text);
 } /* End twa_string_lookup() */
 
-/* This function will perform a pci-dma unmap */
-static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id)
-{
-	struct scsi_cmnd *cmd = tw_dev->srb[request_id];
-
-	if (cmd->SCp.phase == TW_PHASE_SGLIST)
-		scsi_dma_unmap(cmd);
-} /* End twa_unmap_scsi_data() */
-
 /* This function gets called when a disk is coming on-line */
 static int twa_slave_configure(struct scsi_device *sdev)
 {
diff --git a/drivers/scsi/3w-9xxx.h b/drivers/scsi/3w-9xxx.h
index 040f7214e5b7..0fdc83cfa0e1 100644
--- a/drivers/scsi/3w-9xxx.h
+++ b/drivers/scsi/3w-9xxx.h
@@ -324,11 +324,6 @@ static twa_message_type twa_error_table[] = {
 #define TW_CURRENT_DRIVER_BUILD 0
 #define TW_CURRENT_DRIVER_BRANCH 0
 
-/* Phase defines */
-#define TW_PHASE_INITIAL 0
-#define TW_PHASE_SINGLE  1
-#define TW_PHASE_SGLIST  2
-
 /* Misc defines */
 #define TW_9550SX_DRAIN_COMPLETED	      0xFFFF
 #define TW_SECTOR_SIZE                        512
-- 
2.3.7

[PATCH 3.12 098/142] 3w-sas: fix command completion race

[Jiri Slaby]

From: Christoph Hellwig <hch@lst.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 579d69bc1fd56d5af5761969aa529d1d1c188300 upstream.

The 3w-sas driver needs to tear down the dma mappings before returning
the command to the midlayer, as there is no guarantee the sglist and
count are valid after that point.  Also remove the dma mapping helpers
which have another inherent race due to the request_id index.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Torsten Luettgert <ml-lkml@enda.eu>
Tested-by: Bernd Kardatzki <Bernd.Kardatzki@med.uni-tuebingen.de>
Acked-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/scsi/3w-sas.c | 50 ++++++++++----------------------------------------
 drivers/scsi/3w-sas.h |  4 ----
 2 files changed, 10 insertions(+), 44 deletions(-)

diff --git a/drivers/scsi/3w-sas.c b/drivers/scsi/3w-sas.c
index 4de346017e9f..61702ac00d42 100644
--- a/drivers/scsi/3w-sas.c
+++ b/drivers/scsi/3w-sas.c
@@ -303,26 +303,6 @@ static int twl_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
 	return 0;
 } /* End twl_post_command_packet() */
 
-/* This function will perform a pci-dma mapping for a scatter gather list */
-static int twl_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id)
-{
-	int use_sg;
-	struct scsi_cmnd *cmd = tw_dev->srb[request_id];
-
-	use_sg = scsi_dma_map(cmd);
-	if (!use_sg)
-		return 0;
-	else if (use_sg < 0) {
-		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Failed to map scatter gather list");
-		return 0;
-	}
-
-	cmd->SCp.phase = TW_PHASE_SGLIST;
-	cmd->SCp.have_data_in = use_sg;
-
-	return use_sg;
-} /* End twl_map_scsi_sg_data() */
-
 /* This function hands scsi cdb's to the firmware */
 static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry_ISO *sglistarg)
 {
@@ -370,8 +350,8 @@ static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id,
 	if (!sglistarg) {
 		/* Map sglist from scsi layer to cmd packet */
 		if (scsi_sg_count(srb)) {
-			sg_count = twl_map_scsi_sg_data(tw_dev, request_id);
-			if (sg_count == 0)
+			sg_count = scsi_dma_map(srb);
+			if (sg_count <= 0)
 				goto out;
 
 			scsi_for_each_sg(srb, sg, sg_count, i) {
@@ -1116,15 +1096,6 @@ out:
 	return retval;
 } /* End twl_initialize_device_extension() */
 
-/* This function will perform a pci-dma unmap */
-static void twl_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id)
-{
-	struct scsi_cmnd *cmd = tw_dev->srb[request_id];
-
-	if (cmd->SCp.phase == TW_PHASE_SGLIST)
-		scsi_dma_unmap(cmd);
-} /* End twl_unmap_scsi_data() */
-
 /* This function will handle attention interrupts */
 static int twl_handle_attention_interrupt(TW_Device_Extension *tw_dev)
 {
@@ -1265,11 +1236,11 @@ static irqreturn_t twl_interrupt(int irq, void *dev_instance)
 			}
 
 			/* Now complete the io */
+			scsi_dma_unmap(cmd);
+			cmd->scsi_done(cmd);
 			tw_dev->state[request_id] = TW_S_COMPLETED;
 			twl_free_request_id(tw_dev, request_id);
 			tw_dev->posted_request_count--;
-			tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
-			twl_unmap_scsi_data(tw_dev, request_id);
 		}
 
 		/* Check for another response interrupt */
@@ -1414,10 +1385,12 @@ static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_res
 		if ((tw_dev->state[i] != TW_S_FINISHED) &&
 		    (tw_dev->state[i] != TW_S_INITIAL) &&
 		    (tw_dev->state[i] != TW_S_COMPLETED)) {
-			if (tw_dev->srb[i]) {
-				tw_dev->srb[i]->result = (DID_RESET << 16);
-				tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
-				twl_unmap_scsi_data(tw_dev, i);
+			struct scsi_cmnd *cmd = tw_dev->srb[i];
+
+			if (cmd) {
+				cmd->result = (DID_RESET << 16);
+				scsi_dma_unmap(cmd);
+				cmd->scsi_done(cmd);
 			}
 		}
 	}
@@ -1521,9 +1494,6 @@ static int twl_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_
 	/* Save the scsi command for use by the ISR */
 	tw_dev->srb[request_id] = SCpnt;
 
-	/* Initialize phase to zero */
-	SCpnt->SCp.phase = TW_PHASE_INITIAL;
-
 	retval = twl_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
 	if (retval) {
 		tw_dev->state[request_id] = TW_S_COMPLETED;
diff --git a/drivers/scsi/3w-sas.h b/drivers/scsi/3w-sas.h
index d474892701d4..fec6449c7595 100644
--- a/drivers/scsi/3w-sas.h
+++ b/drivers/scsi/3w-sas.h
@@ -103,10 +103,6 @@ static char *twl_aen_severity_table[] =
 #define TW_CURRENT_DRIVER_BUILD 0
 #define TW_CURRENT_DRIVER_BRANCH 0
 
-/* Phase defines */
-#define TW_PHASE_INITIAL 0
-#define TW_PHASE_SGLIST  2
-
 /* Misc defines */
 #define TW_SECTOR_SIZE                        512
 #define TW_MAX_UNITS			      32
-- 
2.3.7

[PATCH 3.12 099/142] drm/radeon: add SI DPM quirk for Sapphire R9 270 Dual-X 2G GDDR5

[Jiri Slaby]

From: Alex Deucher <alexander.deucher@amd.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit cd17e02ff4db58ec32d35cf331c705d295779930 upstream.

Seems to have problems with high mclks.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=76490

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/gpu/drm/radeon/si_dpm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c
index 51588d30d675..bf7e4e9f1669 100644
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -2914,6 +2914,7 @@ struct si_dpm_quirk {
 static struct si_dpm_quirk si_dpm_quirk_list[] = {
 	/* PITCAIRN - https://bugs.freedesktop.org/show_bug.cgi?id=76490 */
 	{ PCI_VENDOR_ID_ATI, 0x6810, 0x1462, 0x3036, 0, 120000 },
+	{ PCI_VENDOR_ID_ATI, 0x6811, 0x174b, 0xe271, 0, 120000 },
 	{ 0, 0, 0, 0 },
 };
 
-- 
2.3.7

[PATCH 3.12 100/142] usb: musb: use new USB_RESUME_TIMEOUT

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 309be239369609929d5d3833ee043f7c5afc95d1 upstream.

Make sure we're using the new macro, so our
resume signaling will always pass certification.

Based on original work by Bin Liu <Bin Liu <b-liu@ti.com>>

Cc: Bin Liu <b-liu@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/musb/musb_core.c    | 3 ++-
 drivers/usb/musb/musb_virthub.c | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 7c0c9335a0d9..3a63ec105045 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -100,6 +100,7 @@
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/dma-mapping.h>
+#include <linux/usb.h>
 
 #include "musb_core.h"
 
@@ -478,7 +479,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 						(USB_PORT_STAT_C_SUSPEND << 16)
 						| MUSB_PORT_STAT_RESUME;
 				musb->rh_timer = jiffies
-						+ msecs_to_jiffies(20);
+					+ msecs_to_jiffies(USB_RESUME_TIMEOUT);
 
 				musb->xceiv->state = OTG_STATE_A_HOST;
 				musb->is_active = 1;
diff --git a/drivers/usb/musb/musb_virthub.c b/drivers/usb/musb/musb_virthub.c
index 9af6bba5eac9..5448125eda5a 100644
--- a/drivers/usb/musb/musb_virthub.c
+++ b/drivers/usb/musb/musb_virthub.c
@@ -105,7 +105,7 @@ static void musb_port_suspend(struct musb *musb, bool do_suspend)
 
 		/* later, GetPortStatus will stop RESUME signaling */
 		musb->port1_status |= MUSB_PORT_STAT_RESUME;
-		musb->rh_timer = jiffies + msecs_to_jiffies(20);
+		musb->rh_timer = jiffies + msecs_to_jiffies(USB_RESUME_TIMEOUT);
 	}
 }
 
-- 
2.3.7

[PATCH 3.12 101/142] usb: host: oxu210hp: use new USB_RESUME_TIMEOUT

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 84c0d178eb9f3a3ae4d63dc97a440266cf17f7f5 upstream.

Make sure we're using the new macro, so our
resume signaling will always pass certification.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/host/oxu210hp-hcd.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/host/oxu210hp-hcd.c b/drivers/usb/host/oxu210hp-hcd.c
index 4a6df2d8f902..8fb603f33729 100644
--- a/drivers/usb/host/oxu210hp-hcd.c
+++ b/drivers/usb/host/oxu210hp-hcd.c
@@ -2497,11 +2497,12 @@ static irqreturn_t oxu210_hcd_irq(struct usb_hcd *hcd)
 					|| oxu->reset_done[i] != 0)
 				continue;
 
-			/* start 20 msec resume signaling from this port,
-			 * and make khubd collect PORT_STAT_C_SUSPEND to
+			/* start USB_RESUME_TIMEOUT resume signaling from this
+			 * port, and make hub_wq collect PORT_STAT_C_SUSPEND to
 			 * stop that signaling.
 			 */
-			oxu->reset_done[i] = jiffies + msecs_to_jiffies(20);
+			oxu->reset_done[i] = jiffies +
+				msecs_to_jiffies(USB_RESUME_TIMEOUT);
 			oxu_dbg(oxu, "port %d remote wakeup\n", i + 1);
 			mod_timer(&hcd->rh_timer, oxu->reset_done[i]);
 		}
-- 
2.3.7

[PATCH 3.12 102/142] usb: host: ehci: use new USB_RESUME_TIMEOUT

[Jiri Slaby]

From: Felipe Balbi <balbi@ti.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit ea16328f80ca8d74434352157f37ef60e2f55ce2 upstream.

Make sure we're using the new macro, so our
resume signaling will always pass certification.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/host/ehci-hcd.c | 10 +++++-----
 drivers/usb/host/ehci-hub.c |  9 ++++++---
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 51b1f4e18c0d..9b27c65c7bb6 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -791,12 +791,12 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd)
 					ehci->reset_done[i] == 0))
 				continue;
 
-			/* start 20 msec resume signaling from this port,
-			 * and make khubd collect PORT_STAT_C_SUSPEND to
-			 * stop that signaling.  Use 5 ms extra for safety,
-			 * like usb_port_resume() does.
+			/* start USB_RESUME_TIMEOUT msec resume signaling from
+			 * this port, and make hub_wq collect
+			 * PORT_STAT_C_SUSPEND to stop that signaling.
 			 */
-			ehci->reset_done[i] = jiffies + msecs_to_jiffies(25);
+			ehci->reset_done[i] = jiffies +
+				msecs_to_jiffies(USB_RESUME_TIMEOUT);
 			set_bit(i, &ehci->resuming_ports);
 			ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
 			usb_hcd_start_port_resume(&hcd->self, i);
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 7ba861543d03..68a06b2f505a 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -482,10 +482,13 @@ static int ehci_bus_resume (struct usb_hcd *hcd)
 		ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
 	}
 
-	/* msleep for 20ms only if code is trying to resume port */
+	/*
+	 * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume
+	 * port
+	 */
 	if (resume_needed) {
 		spin_unlock_irq(&ehci->lock);
-		msleep(20);
+		msleep(USB_RESUME_TIMEOUT);
 		spin_lock_irq(&ehci->lock);
 		if (ehci->shutdown)
 			goto shutdown;
@@ -953,7 +956,7 @@ static int ehci_hub_control (
 			temp &= ~PORT_WAKE_BITS;
 			ehci_writel(ehci, temp | PORT_RESUME, status_reg);
 			ehci->reset_done[wIndex] = jiffies
-					+ msecs_to_jiffies(20);
+					+ msecs_to_jiffies(USB_RESUME_TIMEOUT);
 			set_bit(wIndex, &ehci->resuming_ports);
 			usb_hcd_start_port_resume(&hcd->self, wIndex);
 			break;
-- 
2.3.7

[PATCH 3.12 103/142] usb: gadget: printer: enqueue printer's response for setup request

[Jiri Slaby]

From: Andrzej Pietrasiewicz <andrzej.p@samsung.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit eb132ccbdec5df46e29c9814adf76075ce83576b upstream.

Function-specific setup requests should be handled in such a way, that
apart from filling in the data buffer, the requests are also actually
enqueued: if function-specific setup is called from composte_setup(),
the "usb_ep_queue()" block of code in composite_setup() is skipped.

The printer function lacks this part and it results in e.g. get device id
requests failing: the host expects some response, the device prepares it
but does not equeue it for sending to the host, so the host finally asserts
timeout.

This patch adds enqueueing the prepared responses.

Fixes: 2e87edf49227: "usb: gadget: make g_printer use composite"
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
[ported to stable 3.10 and 3.14]
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/usb/gadget/printer.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c
index bf7a56b6d48a..a0dfdbddbf08 100644
--- a/drivers/usb/gadget/printer.c
+++ b/drivers/usb/gadget/printer.c
@@ -975,6 +975,15 @@ unknown:
 		break;
 	}
 	/* host either stalls (value < 0) or reports success */
+	if (value >= 0) {
+		req->length = value;
+		req->zero = value < wLength;
+		value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
+		if (value < 0) {
+			ERROR(dev, "%s:%d Error!\n", __func__, __LINE__);
+			req->status = 0;
+		}
+	}
 	return value;
 }
 
-- 
2.3.7

[PATCH 3.12 104/142] Drivers: hv: vmbus: Don't wait after requesting offers

[Jiri Slaby]

From: "K. Y. Srinivasan" <kys@microsoft.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 73cffdb65e679b98893f484063462c045adcf212 upstream.

Don't wait after sending request for offers to the host. This wait is
unnecessary and simply adds 5 seconds to the boot time.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/hv/channel_mgmt.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 505fe29c75b0..8c248818592e 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -716,7 +716,7 @@ int vmbus_request_offers(void)
 {
 	struct vmbus_channel_message_header *msg;
 	struct vmbus_channel_msginfo *msginfo;
-	int ret, t;
+	int ret;
 
 	msginfo = kmalloc(sizeof(*msginfo) +
 			  sizeof(struct vmbus_channel_message_header),
@@ -724,8 +724,6 @@ int vmbus_request_offers(void)
 	if (!msginfo)
 		return -ENOMEM;
 
-	init_completion(&msginfo->waitevent);
-
 	msg = (struct vmbus_channel_message_header *)msginfo->msg;
 
 	msg->msgtype = CHANNELMSG_REQUESTOFFERS;
@@ -739,14 +737,6 @@ int vmbus_request_offers(void)
 		goto cleanup;
 	}
 
-	t = wait_for_completion_timeout(&msginfo->waitevent, 5*HZ);
-	if (t == 0) {
-		ret = -ETIMEDOUT;
-		goto cleanup;
-	}
-
-
-
 cleanup:
 	kfree(msginfo);
 
-- 
2.3.7

[PATCH 3.12 105/142] ARC: signal handling robustify

[Jiri Slaby]

From: Vineet Gupta <vgupta@synopsys.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit e4140819dadc3624accac8294881bca8a3cba4ed upstream.

A malicious signal handler / restorer can DOS the system by fudging the
user regs saved on stack, causing weird things such as sigreturn returning
to user mode PC but cpu state still being kernel mode....

Ensure that in sigreturn path status32 always has U bit; any other bogosity
(gargbage PC etc) will be taken care of by normal user mode exceptions mechanisms.

Reproducer signal handler:

    void handle_sig(int signo, siginfo_t *info, void *context)
    {
	ucontext_t *uc = context;
	struct user_regs_struct *regs = &(uc->uc_mcontext.regs);

	regs->scratch.status32 = 0;
    }

Before the fix, kernel would go off to weeds like below:

    --------->8-----------
    [ARCLinux]$ ./signal-test
    Path: /signal-test
    CPU: 0 PID: 61 Comm: signal-test Not tainted 4.0.0-rc5+ #65
    task: 8f177880 ti: 5ffe6000 task.ti: 8f15c000

    [ECR   ]: 0x00220200 => Invalid Write @ 0x00000010 by insn @ 0x00010698
    [EFA   ]: 0x00000010
    [BLINK ]: 0x2007c1ee
    [ERET  ]: 0x10698
    [STAT32]: 0x00000000 :                                   <--------
    BTA: 0x00010680	 SP: 0x5ffe7e48	 FP: 0x00000000
    LPS: 0x20003c6c	LPE: 0x20003c70	LPC: 0x00000000
    ...
    --------->8-----------

Reported-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arc/kernel/signal.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c
index d68b410595c8..a0c63fc48457 100644
--- a/arch/arc/kernel/signal.c
+++ b/arch/arc/kernel/signal.c
@@ -131,6 +131,15 @@ SYSCALL_DEFINE0(rt_sigreturn)
 	/* Don't restart from sigreturn */
 	syscall_wont_restart(regs);
 
+	/*
+	 * Ensure that sigreturn always returns to user mode (in case the
+	 * regs saved on user stack got fudged between save and sigreturn)
+	 * Otherwise it is easy to panic the kernel with a custom
+	 * signal handler and/or restorer which clobberes the status32/ret
+	 * to return to a bogus location in kernel mode.
+	 */
+	regs->status32 |= STATUS_U_MASK;
+
 	return regs->r0;
 
 badframe:
@@ -234,8 +243,11 @@ setup_rt_frame(int signo, struct k_sigaction *ka, siginfo_t *info,
 
 	/*
 	 * handler returns using sigreturn stub provided already by userpsace
+	 * If not, nuke the process right away
 	 */
-	BUG_ON(!(ka->sa.sa_flags & SA_RESTORER));
+	if(!(ka->sa.sa_flags & SA_RESTORER))
+		return 1;
+
 	regs->blink = (unsigned long)ka->sa.sa_restorer;
 
 	/* User Stack for signal handler will be above the frame just carved */
@@ -302,12 +314,12 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
 	      struct pt_regs *regs)
 {
 	sigset_t *oldset = sigmask_to_save();
-	int ret;
+	int failed;
 
 	/* Set up the stack frame */
-	ret = setup_rt_frame(sig, ka, info, oldset, regs);
+	failed = setup_rt_frame(sig, ka, info, oldset, regs);
 
-	if (ret)
+	if (failed)
 		force_sigsegv(sig, current);
 	else
 		signal_delivered(sig, info, ka, regs, 0);
-- 
2.3.7

[PATCH 3.12 106/142] /proc/stat: convert to single_open_size()

[Jiri Slaby]

From: Heiko Carstens <heiko.carstens@de.ibm.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit f74373a5cc7a0155d232c4e999648c7a95435bb2 upstream.

These two patches are supposed to "fix" failed order-4 memory
allocations which have been observed when reading /proc/stat.  The
problem has been observed on s390 as well as on x86.

To address the problem change the seq_file memory allocations to
fallback to use vmalloc, so that allocations also work if memory is
fragmented.

This approach seems to be simpler and less intrusive than changing
/proc/stat to use an interator.  Also it "fixes" other users as well,
which use seq_file's single_open() interface.

This patch (of 2):

Use seq_file's single_open_size() to preallocate a buffer that is large
enough to hold the whole output, instead of open coding it.  Also
calculate the requested size using the number of online cpus instead of
possible cpus, since the size of the output only depends on the number
of online cpus.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Ian Kent <raven@themaw.net>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Thorsten Diehl <thorsten.diehl@de.ibm.com>
Cc: Andrea Righi <andrea@betterlinux.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Stefan Bader <stefan.bader@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/proc/stat.c | 22 ++--------------------
 1 file changed, 2 insertions(+), 20 deletions(-)

diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index b5c72a3be359..339bdf8e488c 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -184,29 +184,11 @@ static int show_stat(struct seq_file *p, void *v)
 
 static int stat_open(struct inode *inode, struct file *file)
 {
-	size_t size = 1024 + 128 * num_possible_cpus();
-	char *buf;
-	struct seq_file *m;
-	int res;
+	size_t size = 1024 + 128 * num_online_cpus();
 
 	/* minimum size to display an interrupt count : 2 bytes */
 	size += 2 * nr_irqs;
-
-	/* don't ask for more than the kmalloc() max size */
-	if (size > KMALLOC_MAX_SIZE)
-		size = KMALLOC_MAX_SIZE;
-	buf = kmalloc(size, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	res = single_open(file, show_stat, NULL);
-	if (!res) {
-		m = file->private_data;
-		m->buf = buf;
-		m->size = ksize(buf);
-	} else
-		kfree(buf);
-	return res;
+	return single_open_size(file, show_stat, NULL, size);
 }
 
 static const struct file_operations proc_stat_operations = {
-- 
2.3.7

[PATCH 3.12 107/142] seq_file: always clear m->count when we free m->buf

[Jiri Slaby]

From: Al Viro <viro@ZenIV.linux.org.uk>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 801a76050bcf8d4e500eb8d048ff6265f37a61c8 upstream.

Once we'd freed m->buf, m->count should become zero - we have no valid
contents reachable via m->buf.

Reported-by: Charley (Hao Chuan) Chu <charley.chu@broadcom.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/seq_file.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/seq_file.c b/fs/seq_file.c
index a290157265ef..092951efaf43 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -136,6 +136,7 @@ static int traverse(struct seq_file *m, loff_t offset)
 Eoverflow:
 	m->op->stop(m, p);
 	kfree(m->buf);
+	m->count = 0;
 	m->buf = kmalloc(m->size <<= 1, GFP_KERNEL);
 	return !m->buf ? -ENOMEM : -EAGAIN;
 }
@@ -232,10 +233,10 @@ ssize_t seq_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
 			goto Fill;
 		m->op->stop(m, p);
 		kfree(m->buf);
+		m->count = 0;
 		m->buf = kmalloc(m->size <<= 1, GFP_KERNEL);
 		if (!m->buf)
 			goto Enomem;
-		m->count = 0;
 		m->version = 0;
 		pos = m->index;
 		p = m->op->start(m, &pos);
-- 
2.3.7

[PATCH 3.12 108/142] fs/seq_file: fallback to vmalloc allocation

[Jiri Slaby]

From: Heiko Carstens <heiko.carstens@de.ibm.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 058504edd02667eef8fac9be27ab3ea74332e9b4 upstream.

There are a couple of seq_files which use the single_open() interface.
This interface requires that the whole output must fit into a single
buffer.

E.g.  for /proc/stat allocation failures have been observed because an
order-4 memory allocation failed due to memory fragmentation.  In such
situations reading /proc/stat is not possible anymore.

Therefore change the seq_file code to fallback to vmalloc allocations
which will usually result in a couple of order-0 allocations and hence
also work if memory is fragmented.

For reference a call trace where reading from /proc/stat failed:

  sadc: page allocation failure: order:4, mode:0x1040d0
  CPU: 1 PID: 192063 Comm: sadc Not tainted 3.10.0-123.el7.s390x #1
  [...]
  Call Trace:
    show_stack+0x6c/0xe8
    warn_alloc_failed+0xd6/0x138
    __alloc_pages_nodemask+0x9da/0xb68
    __get_free_pages+0x2e/0x58
    kmalloc_order_trace+0x44/0xc0
    stat_open+0x5a/0xd8
    proc_reg_open+0x8a/0x140
    do_dentry_open+0x1bc/0x2c8
    finish_open+0x46/0x60
    do_last+0x382/0x10d0
    path_openat+0xc8/0x4f8
    do_filp_open+0x46/0xa8
    do_sys_open+0x114/0x1f0
    sysc_tracego+0x14/0x1a

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Tested-by: David Rientjes <rientjes@google.com>
Cc: Ian Kent <raven@themaw.net>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Thorsten Diehl <thorsten.diehl@de.ibm.com>
Cc: Andrea Righi <andrea@betterlinux.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Stefan Bader <stefan.bader@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/seq_file.c | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

diff --git a/fs/seq_file.c b/fs/seq_file.c
index 092951efaf43..6e050e26af43 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -8,8 +8,10 @@
 #include <linux/fs.h>
 #include <linux/export.h>
 #include <linux/seq_file.h>
+#include <linux/vmalloc.h>
 #include <linux/slab.h>
 #include <linux/cred.h>
+#include <linux/mm.h>
 
 #include <asm/uaccess.h>
 #include <asm/page.h>
@@ -30,6 +32,16 @@ static void seq_set_overflow(struct seq_file *m)
 	m->count = m->size;
 }
 
+static void *seq_buf_alloc(unsigned long size)
+{
+	void *buf;
+
+	buf = kmalloc(size, GFP_KERNEL | __GFP_NOWARN);
+	if (!buf && size > PAGE_SIZE)
+		buf = vmalloc(size);
+	return buf;
+}
+
 /**
  *	seq_open -	initialize sequential file
  *	@file: file we initialize
@@ -96,7 +108,7 @@ static int traverse(struct seq_file *m, loff_t offset)
 		return 0;
 	}
 	if (!m->buf) {
-		m->buf = kmalloc(m->size = PAGE_SIZE, GFP_KERNEL);
+		m->buf = seq_buf_alloc(m->size = PAGE_SIZE);
 		if (!m->buf)
 			return -ENOMEM;
 	}
@@ -135,9 +147,9 @@ static int traverse(struct seq_file *m, loff_t offset)
 
 Eoverflow:
 	m->op->stop(m, p);
-	kfree(m->buf);
+	kvfree(m->buf);
 	m->count = 0;
-	m->buf = kmalloc(m->size <<= 1, GFP_KERNEL);
+	m->buf = seq_buf_alloc(m->size <<= 1);
 	return !m->buf ? -ENOMEM : -EAGAIN;
 }
 
@@ -192,7 +204,7 @@ ssize_t seq_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
 
 	/* grab buffer if we didn't have one */
 	if (!m->buf) {
-		m->buf = kmalloc(m->size = PAGE_SIZE, GFP_KERNEL);
+		m->buf = seq_buf_alloc(m->size = PAGE_SIZE);
 		if (!m->buf)
 			goto Enomem;
 	}
@@ -232,9 +244,9 @@ ssize_t seq_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
 		if (m->count < m->size)
 			goto Fill;
 		m->op->stop(m, p);
-		kfree(m->buf);
+		kvfree(m->buf);
 		m->count = 0;
-		m->buf = kmalloc(m->size <<= 1, GFP_KERNEL);
+		m->buf = seq_buf_alloc(m->size <<= 1);
 		if (!m->buf)
 			goto Enomem;
 		m->version = 0;
@@ -350,7 +362,7 @@ EXPORT_SYMBOL(seq_lseek);
 int seq_release(struct inode *inode, struct file *file)
 {
 	struct seq_file *m = file->private_data;
-	kfree(m->buf);
+	kvfree(m->buf);
 	kfree(m);
 	return 0;
 }
@@ -605,13 +617,13 @@ EXPORT_SYMBOL(single_open);
 int single_open_size(struct file *file, int (*show)(struct seq_file *, void *),
 		void *data, size_t size)
 {
-	char *buf = kmalloc(size, GFP_KERNEL);
+	char *buf = seq_buf_alloc(size);
 	int ret;
 	if (!buf)
 		return -ENOMEM;
 	ret = single_open(file, show, data);
 	if (ret) {
-		kfree(buf);
+		kvfree(buf);
 		return ret;
 	}
 	((struct seq_file *)file->private_data)->buf = buf;
-- 
2.3.7

[PATCH 3.12 109/142] mm: prevent endless growth of anon_vma hierarchy

[Jiri Slaby]

From: Konstantin Khlebnikov <koct9i@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 7a3ef208e662f4b63d43a23f61a64a129c525bbc upstream.

Constantly forking task causes unlimited grow of anon_vma chain.  Each
next child allocates new level of anon_vmas and links vma to all
previous levels because pages might be inherited from any level.

This patch adds heuristic which decides to reuse existing anon_vma
instead of forking new one.  It adds counter anon_vma->degree which
counts linked vmas and directly descending anon_vmas and reuses anon_vma
if counter is lower than two.  As a result each anon_vma has either vma
or at least two descending anon_vmas.  In such trees half of nodes are
leafs with alive vmas, thus count of anon_vmas is no more than two times
bigger than count of vmas.

This heuristic reuses anon_vmas as few as possible because each reuse
adds false aliasing among vmas and rmap walker ought to scan more ptes
when it searches where page is might be mapped.

Link: http://lkml.kernel.org/r/20120816024610.GA5350@evergreen.ssec.wisc.edu
Fixes: 5beb49305251 ("mm: change anon_vma linking to fix multi-process server scalability issue")
[akpm@linux-foundation.org: fix typo, per Rik]
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Reported-by: Daniel Forrest <dan.forrest@ssec.wisc.edu>
Tested-by: Michal Hocko <mhocko@suse.cz>
Tested-by: Jerome Marchand <jmarchan@redhat.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: <stable@vger.kernel.org>	[2.6.34+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 include/linux/rmap.h | 10 ++++++++++
 mm/rmap.c            | 42 +++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 51 insertions(+), 1 deletion(-)

diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 6dacb93a6d94..fc7c6cb295e4 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -37,6 +37,16 @@ struct anon_vma {
 	atomic_t refcount;
 
 	/*
+	 * Count of child anon_vmas and VMAs which points to this anon_vma.
+	 *
+	 * This counter is used for making decision about reusing anon_vma
+	 * instead of forking new one. See comments in function anon_vma_clone.
+	 */
+	unsigned degree;
+
+	struct anon_vma *parent;	/* Parent of this anon_vma */
+
+	/*
 	 * NOTE: the LSB of the rb_root.rb_node is set by
 	 * mm_take_all_locks() _after_ taking the above lock. So the
 	 * rb_root must only be read/written after taking the above lock
diff --git a/mm/rmap.c b/mm/rmap.c
index 440c71c43b8d..8640f449f4c5 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -72,6 +72,8 @@ static inline struct anon_vma *anon_vma_alloc(void)
 	anon_vma = kmem_cache_alloc(anon_vma_cachep, GFP_KERNEL);
 	if (anon_vma) {
 		atomic_set(&anon_vma->refcount, 1);
+		anon_vma->degree = 1;	/* Reference for first vma */
+		anon_vma->parent = anon_vma;
 		/*
 		 * Initialise the anon_vma root to point to itself. If called
 		 * from fork, the root will be reset to the parents anon_vma.
@@ -188,6 +190,8 @@ int anon_vma_prepare(struct vm_area_struct *vma)
 		if (likely(!vma->anon_vma)) {
 			vma->anon_vma = anon_vma;
 			anon_vma_chain_link(vma, avc, anon_vma);
+			/* vma reference or self-parent link for new root */
+			anon_vma->degree++;
 			allocated = NULL;
 			avc = NULL;
 		}
@@ -236,6 +240,14 @@ static inline void unlock_anon_vma_root(struct anon_vma *root)
 /*
  * Attach the anon_vmas from src to dst.
  * Returns 0 on success, -ENOMEM on failure.
+ *
+ * If dst->anon_vma is NULL this function tries to find and reuse existing
+ * anon_vma which has no vmas and only one child anon_vma. This prevents
+ * degradation of anon_vma hierarchy to endless linear chain in case of
+ * constantly forking task. On the other hand, an anon_vma with more than one
+ * child isn't reused even if there was no alive vma, thus rmap walker has a
+ * good chance of avoiding scanning the whole hierarchy when it searches where
+ * page is mapped.
  */
 int anon_vma_clone(struct vm_area_struct *dst, struct vm_area_struct *src)
 {
@@ -256,7 +268,21 @@ int anon_vma_clone(struct vm_area_struct *dst, struct vm_area_struct *src)
 		anon_vma = pavc->anon_vma;
 		root = lock_anon_vma_root(root, anon_vma);
 		anon_vma_chain_link(dst, avc, anon_vma);
+
+		/*
+		 * Reuse existing anon_vma if its degree lower than two,
+		 * that means it has no vma and only one anon_vma child.
+		 *
+		 * Do not chose parent anon_vma, otherwise first child
+		 * will always reuse it. Root anon_vma is never reused:
+		 * it has self-parent reference and at least one child.
+		 */
+		if (!dst->anon_vma && anon_vma != src->anon_vma &&
+				anon_vma->degree < 2)
+			dst->anon_vma = anon_vma;
 	}
+	if (dst->anon_vma)
+		dst->anon_vma->degree++;
 	unlock_anon_vma_root(root);
 	return 0;
 
@@ -280,6 +306,9 @@ int anon_vma_fork(struct vm_area_struct *vma, struct vm_area_struct *pvma)
 	if (!pvma->anon_vma)
 		return 0;
 
+	/* Drop inherited anon_vma, we'll reuse existing or allocate new. */
+	vma->anon_vma = NULL;
+
 	/*
 	 * First, attach the new VMA to the parent VMA's anon_vmas,
 	 * so rmap can find non-COWed pages in child processes.
@@ -288,6 +317,10 @@ int anon_vma_fork(struct vm_area_struct *vma, struct vm_area_struct *pvma)
 	if (error)
 		return error;
 
+	/* An existing anon_vma has been reused, all done then. */
+	if (vma->anon_vma)
+		return 0;
+
 	/* Then add our own anon_vma. */
 	anon_vma = anon_vma_alloc();
 	if (!anon_vma)
@@ -301,6 +334,7 @@ int anon_vma_fork(struct vm_area_struct *vma, struct vm_area_struct *pvma)
 	 * lock any of the anon_vmas in this anon_vma tree.
 	 */
 	anon_vma->root = pvma->anon_vma->root;
+	anon_vma->parent = pvma->anon_vma;
 	/*
 	 * With refcounts, an anon_vma can stay around longer than the
 	 * process it belongs to. The root anon_vma needs to be pinned until
@@ -311,6 +345,7 @@ int anon_vma_fork(struct vm_area_struct *vma, struct vm_area_struct *pvma)
 	vma->anon_vma = anon_vma;
 	anon_vma_lock_write(anon_vma);
 	anon_vma_chain_link(vma, avc, anon_vma);
+	anon_vma->parent->degree++;
 	anon_vma_unlock_write(anon_vma);
 
 	return 0;
@@ -341,12 +376,16 @@ void unlink_anon_vmas(struct vm_area_struct *vma)
 		 * Leave empty anon_vmas on the list - we'll need
 		 * to free them outside the lock.
 		 */
-		if (RB_EMPTY_ROOT(&anon_vma->rb_root))
+		if (RB_EMPTY_ROOT(&anon_vma->rb_root)) {
+			anon_vma->parent->degree--;
 			continue;
+		}
 
 		list_del(&avc->same_vma);
 		anon_vma_chain_free(avc);
 	}
+	if (vma->anon_vma)
+		vma->anon_vma->degree--;
 	unlock_anon_vma_root(root);
 
 	/*
@@ -357,6 +396,7 @@ void unlink_anon_vmas(struct vm_area_struct *vma)
 	list_for_each_entry_safe(avc, next, &vma->anon_vma_chain, same_vma) {
 		struct anon_vma *anon_vma = avc->anon_vma;
 
+		BUG_ON(anon_vma->degree);
 		put_anon_vma(anon_vma);
 
 		list_del(&avc->same_vma);
-- 
2.3.7

[PATCH 3.12 110/142] mm: fix corner case in anon_vma endless growing prevention

[Jiri Slaby]

From: Konstantin Khlebnikov <koct9i@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit b800c91a0517071156e772d4fb329ad33590da62 upstream.

Fix for BUG_ON(anon_vma->degree) splashes in unlink_anon_vmas() ("kernel
BUG at mm/rmap.c:399!") caused by commit 7a3ef208e662 ("mm: prevent
endless growth of anon_vma hierarchy")

Anon_vma_clone() is usually called for a copy of source vma in
destination argument.  If source vma has anon_vma it should be already
in dst->anon_vma.  NULL in dst->anon_vma is used as a sign that it's
called from anon_vma_fork().  In this case anon_vma_clone() finds
anon_vma for reusing.

Vma_adjust() calls it differently and this breaks anon_vma reusing
logic: anon_vma_clone() links vma to old anon_vma and updates degree
counters but vma_adjust() overrides vma->anon_vma right after that.  As
a result final unlink_anon_vmas() decrements degree for wrong anon_vma.

This patch assigns ->anon_vma before calling anon_vma_clone().

Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Reported-and-tested-by: Chris Clayton <chris2553@googlemail.com>
Reported-and-tested-by: Oded Gabbay <oded.gabbay@amd.com>
Reported-and-tested-by: Chih-Wei Huang <cwhuang@android-x86.org>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Daniel Forrest <dan.forrest@ssec.wisc.edu>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: stable@vger.kernel.org  # to match back-porting of 7a3ef208e662
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 mm/mmap.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index c3ed083cfb59..0ace27f78982 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -748,10 +748,12 @@ again:			remove_next = 1 + (end > next->vm_end);
 		if (exporter && exporter->anon_vma && !importer->anon_vma) {
 			int error;
 
+			importer->anon_vma = exporter->anon_vma;
 			error = anon_vma_clone(importer, exporter);
-			if (error)
+			if (error) {
+				importer->anon_vma = NULL;
 				return error;
-			importer->anon_vma = exporter->anon_vma;
+			}
 		}
 	}
 
-- 
2.3.7

[PATCH 3.12 111/142] mm: fix anon_vma->degree underflow in anon_vma endless growing prevention

[Jiri Slaby]

From: Leon Yu <chianglungyu@gmail.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 3fe89b3e2a7bbf3e97657104b9b33a9d81b950b3 upstream.

I have constantly stumbled upon "kernel BUG at mm/rmap.c:399!" after
upgrading to 3.19 and had no luck with 4.0-rc1 neither.

So, after looking into new logic introduced by commit 7a3ef208e662 ("mm:
prevent endless growth of anon_vma hierarchy"), I found chances are that
unlink_anon_vmas() is called without incrementing dst->anon_vma->degree
in anon_vma_clone() due to allocation failure.  If dst->anon_vma is not
NULL in error path, its degree will be incorrectly decremented in
unlink_anon_vmas() and eventually underflow when exiting as a result of
another call to unlink_anon_vmas().  That's how "kernel BUG at
mm/rmap.c:399!" is triggered for me.

This patch fixes the underflow by dropping dst->anon_vma when allocation
fails.  It's safe to do so regardless of original value of dst->anon_vma
because dst->anon_vma doesn't have valid meaning if anon_vma_clone()
fails.  Besides, callers don't care dst->anon_vma in such case neither.

Also suggested by Michal Hocko, we can clean up vma_adjust() a bit as
anon_vma_clone() now does the work.

[akpm@linux-foundation.org: tweak comment]
Fixes: 7a3ef208e662 ("mm: prevent endless growth of anon_vma hierarchy")
Signed-off-by: Leon Yu <chianglungyu@gmail.com>
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 mm/mmap.c | 4 +---
 mm/rmap.c | 7 +++++++
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 0ace27f78982..5070dabd5be4 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -750,10 +750,8 @@ again:			remove_next = 1 + (end > next->vm_end);
 
 			importer->anon_vma = exporter->anon_vma;
 			error = anon_vma_clone(importer, exporter);
-			if (error) {
-				importer->anon_vma = NULL;
+			if (error)
 				return error;
-			}
 		}
 	}
 
diff --git a/mm/rmap.c b/mm/rmap.c
index 8640f449f4c5..ecb6136559b6 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -287,6 +287,13 @@ int anon_vma_clone(struct vm_area_struct *dst, struct vm_area_struct *src)
 	return 0;
 
  enomem_failure:
+	/*
+	 * dst->anon_vma is dropped here otherwise its degree can be incorrectly
+	 * decremented in unlink_anon_vmas().
+	 * We can safely do this because callers of anon_vma_clone() don't care
+	 * about dst->anon_vma if anon_vma_clone() failed.
+	 */
+	dst->anon_vma = NULL;
 	unlink_anon_vmas(dst);
 	return -ENOMEM;
 }
-- 
2.3.7

[PATCH 3.12 112/142] ocfs2: dlm: fix race between purge and get lock resource

[Jiri Slaby]

From: Junxiao Bi <junxiao.bi@oracle.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit b1432a2a35565f538586774a03bf277c27fc267d upstream.

There is a race window in dlm_get_lock_resource(), which may return a
lock resource which has been purged.  This will cause the process to
hang forever in dlmlock() as the ast msg can't be handled due to its
lock resource not existing.

    dlm_get_lock_resource {
        ...
        spin_lock(&dlm->spinlock);
        tmpres = __dlm_lookup_lockres_full(dlm, lockid, namelen, hash);
        if (tmpres) {
             spin_unlock(&dlm->spinlock);
             >>>>>>>> race window, dlm_run_purge_list() may run and purge
                              the lock resource
             spin_lock(&tmpres->spinlock);
             ...
             spin_unlock(&tmpres->spinlock);
        }
    }

Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/ocfs2/dlm/dlmmaster.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index 673c9bf5debc..4fe55b776a74 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -726,6 +726,19 @@ lookup:
 	if (tmpres) {
 		spin_unlock(&dlm->spinlock);
 		spin_lock(&tmpres->spinlock);
+
+		/*
+		 * Right after dlm spinlock was released, dlm_thread could have
+		 * purged the lockres. Check if lockres got unhashed. If so
+		 * start over.
+		 */
+		if (hlist_unhashed(&tmpres->hash_node)) {
+			spin_unlock(&tmpres->spinlock);
+			dlm_lockres_put(tmpres);
+			tmpres = NULL;
+			goto lookup;
+		}
+
 		/* Wait on the thread that is mastering the resource */
 		if (tmpres->owner == DLM_LOCK_RES_OWNER_UNKNOWN) {
 			__dlm_wait_on_lockres(tmpres);
-- 
2.3.7

[PATCH 3.12 113/142] nilfs2: fix sanity check of btree level in nilfs_btree_root_broken()

[Jiri Slaby]

From: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit d8fd150fe3935e1692bf57c66691e17409ebb9c1 upstream.

The range check for b-tree level parameter in nilfs_btree_root_broken()
is wrong; it accepts the case of "level == NILFS_BTREE_LEVEL_MAX" even
though the level is limited to values in the range of 0 to
(NILFS_BTREE_LEVEL_MAX - 1).

Since the level parameter is read from storage device and used to index
nilfs_btree_path array whose element count is NILFS_BTREE_LEVEL_MAX, it
can cause memory overrun during btree operations if the boundary value
is set to the level parameter on device.

This fixes the broken sanity check and adds a comment to clarify that
the upper bound NILFS_BTREE_LEVEL_MAX is exclusive.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/nilfs2/btree.c         | 2 +-
 include/linux/nilfs2_fs.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c
index ecdbae19a766..090d8ce25bd1 100644
--- a/fs/nilfs2/btree.c
+++ b/fs/nilfs2/btree.c
@@ -388,7 +388,7 @@ static int nilfs_btree_root_broken(const struct nilfs_btree_node *node,
 	nchildren = nilfs_btree_node_get_nchildren(node);
 
 	if (unlikely(level < NILFS_BTREE_LEVEL_NODE_MIN ||
-		     level > NILFS_BTREE_LEVEL_MAX ||
+		     level >= NILFS_BTREE_LEVEL_MAX ||
 		     nchildren < 0 ||
 		     nchildren > NILFS_BTREE_ROOT_NCHILDREN_MAX)) {
 		pr_crit("NILFS: bad btree root (inode number=%lu): level = %d, flags = 0x%x, nchildren = %d\n",
diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h
index 98755767c7b0..1108acaacfc6 100644
--- a/include/linux/nilfs2_fs.h
+++ b/include/linux/nilfs2_fs.h
@@ -458,7 +458,7 @@ struct nilfs_btree_node {
 /* level */
 #define NILFS_BTREE_LEVEL_DATA          0
 #define NILFS_BTREE_LEVEL_NODE_MIN      (NILFS_BTREE_LEVEL_DATA + 1)
-#define NILFS_BTREE_LEVEL_MAX           14
+#define NILFS_BTREE_LEVEL_MAX           14	/* Max level (exclusive) */
 
 /**
  * struct nilfs_palloc_group_desc - block group descriptor
-- 
2.3.7

[PATCH 3.12 114/142] RDMA/CMA: Canonize IPv4 on IPV6 sockets properly

[Jiri Slaby]

From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 285214409a9e5fceba2215461b4682b6069d8e77 upstream.

When accepting a new IPv4 connect to an IPv6 socket, the CMA tries to
canonize the address family to IPv4, but does not properly process
the listening sockaddr to get the listening port, and does not properly
set the address family of the canonized sockaddr.

Fixes: e51060f08a61 ("IB: IP address based RDMA connection manager")

Reported-By: Yotam Kenneth <yotamke@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/infiniband/core/cma.c | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index dab4b41f1715..1429143301a7 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -840,19 +840,27 @@ static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id
 	memcpy(&ib->sib_addr, &path->dgid, 16);
 }
 
+static __be16 ss_get_port(const struct sockaddr_storage *ss)
+{
+	if (ss->ss_family == AF_INET)
+		return ((struct sockaddr_in *)ss)->sin_port;
+	else if (ss->ss_family == AF_INET6)
+		return ((struct sockaddr_in6 *)ss)->sin6_port;
+	BUG();
+}
+
 static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 			      struct cma_hdr *hdr)
 {
-	struct sockaddr_in *listen4, *ip4;
+	struct sockaddr_in *ip4;
 
-	listen4 = (struct sockaddr_in *) &listen_id->route.addr.src_addr;
 	ip4 = (struct sockaddr_in *) &id->route.addr.src_addr;
-	ip4->sin_family = listen4->sin_family;
+	ip4->sin_family = AF_INET;
 	ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
-	ip4->sin_port = listen4->sin_port;
+	ip4->sin_port = ss_get_port(&listen_id->route.addr.src_addr);
 
 	ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr;
-	ip4->sin_family = listen4->sin_family;
+	ip4->sin_family = AF_INET;
 	ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
 	ip4->sin_port = hdr->port;
 }
@@ -860,16 +868,15 @@ static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_i
 static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 			      struct cma_hdr *hdr)
 {
-	struct sockaddr_in6 *listen6, *ip6;
+	struct sockaddr_in6 *ip6;
 
-	listen6 = (struct sockaddr_in6 *) &listen_id->route.addr.src_addr;
 	ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr;
-	ip6->sin6_family = listen6->sin6_family;
+	ip6->sin6_family = AF_INET6;
 	ip6->sin6_addr = hdr->dst_addr.ip6;
-	ip6->sin6_port = listen6->sin6_port;
+	ip6->sin6_port = ss_get_port(&listen_id->route.addr.src_addr);
 
 	ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr;
-	ip6->sin6_family = listen6->sin6_family;
+	ip6->sin6_family = AF_INET6;
 	ip6->sin6_addr = hdr->src_addr.ip6;
 	ip6->sin6_port = hdr->port;
 }
-- 
2.3.7

[PATCH 3.12 115/142] gpio: unregister gpiochip device before removing it

[Jiri Slaby]

From: Johan Hovold <johan@kernel.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 01cca93a9491ed95992523ff7e79dd9bfcdea8e0 upstream.

Unregister gpiochip device (used to export information through sysfs)
before removing it internally. This way removal will reverse addition.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/gpio/gpiolib.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 8a9b61adcd87..9ba1bb0edab3 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1257,6 +1257,8 @@ int gpiochip_remove(struct gpio_chip *chip)
 	int		status = 0;
 	unsigned	id;
 
+	gpiochip_unexport(chip);
+
 	spin_lock_irqsave(&gpio_lock, flags);
 
 	gpiochip_remove_pin_ranges(chip);
@@ -1277,9 +1279,6 @@ int gpiochip_remove(struct gpio_chip *chip)
 
 	spin_unlock_irqrestore(&gpio_lock, flags);
 
-	if (status == 0)
-		gpiochip_unexport(chip);
-
 	return status;
 }
 EXPORT_SYMBOL_GPL(gpiochip_remove);
-- 
2.3.7

[PATCH 3.12 116/142] gpio: sysfs: fix memory leaks and device hotplug

[Jiri Slaby]

From: Johan Hovold <johan@kernel.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 483d821108791092798f5d230686868112927044 upstream.

Unregister GPIOs requested through sysfs at chip remove to avoid leaking
the associated memory and sysfs entries.

The stale sysfs entries prevented the gpio numbers from being exported
when the gpio range was later reused (e.g. at device reconnect).

This also fixes the related module-reference leak.

Note that kernfs makes sure that any on-going sysfs operations finish
before the class devices are unregistered and that further accesses
fail.

The chip exported flag is used to prevent gpiod exports during removal.
This also makes it harder to trigger, but does not fix, the related race
between gpiochip_remove and export_store, which is really a race with
gpiod_request that needs to be addressed separately.

Also note that this would prevent the crashes (e.g. NULL-dereferences)
at reconnect that affects pre-3.18 kernels, as well as use-after-free on
operations on open attribute files on pre-3.14 kernels (prior to
kernfs).

Fixes: d8f388d8dc8d ("gpio: sysfs interface")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/gpio/gpiolib.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 9ba1bb0edab3..77e38b76f925 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -747,6 +747,7 @@ static struct class gpio_class = {
  */
 static int gpiod_export(struct gpio_desc *desc, bool direction_may_change)
 {
+	struct gpio_chip	*chip;
 	unsigned long		flags;
 	int			status;
 	const char		*ioname = NULL;
@@ -764,8 +765,16 @@ static int gpiod_export(struct gpio_desc *desc, bool direction_may_change)
 		return -EINVAL;
 	}
 
+	chip = desc->chip;
+
 	mutex_lock(&sysfs_lock);
 
+	/* check if chip is being removed */
+	if (!chip || !chip->exported) {
+		status = -ENODEV;
+		goto fail_unlock;
+	}
+
 	spin_lock_irqsave(&gpio_lock, flags);
 	if (!test_bit(FLAG_REQUESTED, &desc->flags) ||
 	     test_bit(FLAG_EXPORT, &desc->flags)) {
@@ -1029,12 +1038,15 @@ static void gpiochip_unexport(struct gpio_chip *chip)
 {
 	int			status;
 	struct device		*dev;
+	struct gpio_desc *desc;
+	unsigned int i;
 
 	mutex_lock(&sysfs_lock);
 	dev = class_find_device(&gpio_class, NULL, chip, match_export);
 	if (dev) {
 		put_device(dev);
 		device_unregister(dev);
+		/* prevent further gpiod exports */
 		chip->exported = 0;
 		status = 0;
 	} else
@@ -1044,6 +1056,13 @@ static void gpiochip_unexport(struct gpio_chip *chip)
 	if (status)
 		pr_debug("%s: chip %s status %d\n", __func__,
 				chip->label, status);
+
+	/* unregister gpiod class devices owned by sysfs */
+	for (i = 0; i < chip->ngpio; i++) {
+		desc = &chip->desc[i];
+		if (test_and_clear_bit(FLAG_SYSFS, &desc->flags))
+			gpiod_free(desc);
+	}
 }
 
 static int __init gpiolib_sysfs_init(void)
-- 
2.3.7

[PATCH 3.12 117/142] mnt: Fix fs_fully_visible to verify the root directory is visible

[Jiri Slaby]

From: "Eric W. Biederman" <ebiederm@xmission.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 7e96c1b0e0f495c5a7450dc4aa7c9a24ba4305bd upstream.

This fixes a dumb bug in fs_fully_visible that allows proc or sys to
be mounted if there is a bind mount of part of /proc/ or /sys/ visible.

Reported-by: Eric Windisch <ewindisch@docker.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/namespace.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fs/namespace.c b/fs/namespace.c
index 7c3c0f6d2744..247f34d43dda 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2940,6 +2940,12 @@ bool fs_fully_visible(struct file_system_type *type)
 		if (mnt->mnt.mnt_sb->s_type != type)
 			continue;
 
+		/* This mount is not fully visible if it's root directory
+		 * is not the root directory of the filesystem.
+		 */
+		if (mnt->mnt.mnt_root != mnt->mnt.mnt_sb->s_root)
+			continue;
+
 		/* This mount is not fully visible if there are any child mounts
 		 * that cover anything except for empty directories.
 		 */
-- 
2.3.7

[PATCH 3.12 118/142] mm/memory-failure: call shake_page() when error hits thp tail page

[Jiri Slaby]

From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 09789e5de18e4e442870b2d700831f5cb802eb05 upstream.

Currently memory_failure() calls shake_page() to sweep pages out from
pcplists only when the victim page is 4kB LRU page or thp head page.
But we should do this for a thp tail page too.

Consider that a memory error hits a thp tail page whose head page is on
a pcplist when memory_failure() runs.  Then, the current kernel skips
shake_pages() part, so hwpoison_user_mappings() returns without calling
split_huge_page() nor try_to_unmap() because PageLRU of the thp head is
still cleared due to the skip of shake_page().

As a result, me_huge_page() runs for the thp, which is broken behavior.

One effect is a leak of the thp.  And another is to fail to isolate the
memory error, so later access to the error address causes another MCE,
which kills the processes which used the thp.

This patch fixes this problem by calling shake_page() for thp tail case.

Fixes: 385de35722c9 ("thp: allow a hwpoisoned head page to be put back to LRU")
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Dean Nelson <dnelson@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Jin Dongming <jin.dongming@np.css.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 mm/memory-failure.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 532b4661985c..2e94ad1133af 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1149,10 +1149,10 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
 	 * The check (unnecessarily) ignores LRU pages being isolated and
 	 * walked by the page reclaim code, however that's not a big loss.
 	 */
-	if (!PageHuge(p) && !PageTransTail(p)) {
-		if (!PageLRU(p))
-			shake_page(p, 0);
-		if (!PageLRU(p)) {
+	if (!PageHuge(p)) {
+		if (!PageLRU(hpage))
+			shake_page(hpage, 0);
+		if (!PageLRU(hpage)) {
 			/*
 			 * shake_page could have turned it free.
 			 */
-- 
2.3.7

[PATCH 3.12 119/142] writeback: use |1 instead of +1 to protect against div by zero

[Jiri Slaby]

From: Tejun Heo <tj@kernel.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 464d1387acb94dc43ba772b35242345e3d2ead1b upstream.

mm/page-writeback.c has several places where 1 is added to the divisor
to prevent division by zero exceptions; however, if the original
divisor is equivalent to -1, adding 1 leads to division by zero.

There are three places where +1 is used for this purpose - one in
pos_ratio_polynom() and two in bdi_position_ratio().  The second one
in bdi_position_ratio() actually triggered div-by-zero oops on a
machine running a 3.10 kernel.  The divisor is

  x_intercept - bdi_setpoint + 1 == span + 1

span is confirmed to be (u32)-1.  It isn't clear how it ended up that
but it could be from write bandwidth calculation underflow fixed by
c72efb658f7c ("writeback: fix possible underflow in write bandwidth
calculation").

At any rate, +1 isn't a proper protection against div-by-zero.  This
patch converts all +1 protections to |1.  Note that
bdi_update_dirty_ratelimit() was already using |1 before this patch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 mm/page-writeback.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 51d8d15f48d7..656a5490f693 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -601,7 +601,7 @@ static long long pos_ratio_polynom(unsigned long setpoint,
 	long x;
 
 	x = div64_s64(((s64)setpoint - (s64)dirty) << RATELIMIT_CALC_SHIFT,
-		    limit - setpoint + 1);
+		      (limit - setpoint) | 1);
 	pos_ratio = x;
 	pos_ratio = pos_ratio * x >> RATELIMIT_CALC_SHIFT;
 	pos_ratio = pos_ratio * x >> RATELIMIT_CALC_SHIFT;
@@ -828,7 +828,7 @@ static unsigned long bdi_position_ratio(struct backing_dev_info *bdi,
 	 * scale global setpoint to bdi's:
 	 *	bdi_setpoint = setpoint * bdi_thresh / thresh
 	 */
-	x = div_u64((u64)bdi_thresh << 16, thresh + 1);
+	x = div_u64((u64)bdi_thresh << 16, thresh | 1);
 	bdi_setpoint = setpoint * (u64)x >> 16;
 	/*
 	 * Use span=(8*write_bw) in single bdi case as indicated by
@@ -843,7 +843,7 @@ static unsigned long bdi_position_ratio(struct backing_dev_info *bdi,
 
 	if (bdi_dirty < x_intercept - span / 4) {
 		pos_ratio = div64_u64(pos_ratio * (x_intercept - bdi_dirty),
-				    x_intercept - bdi_setpoint + 1);
+				      (x_intercept - bdi_setpoint) | 1);
 	} else
 		pos_ratio /= 4;
 
-- 
2.3.7

[PATCH 3.12 120/142] mm: soft-offline: fix num_poisoned_pages counting on concurrent events

[Jiri Slaby]

From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 602498f9aa43d4951eece3fd6ad95a6d0a78d537 upstream.

If multiple soft offline events hit one free page/hugepage concurrently,
soft_offline_page() can handle the free page/hugepage multiple times,
which makes num_poisoned_pages counter increased more than once.  This
patch fixes this wrong counting by checking TestSetPageHWPoison for normal
papes and by checking the return value of dequeue_hwpoisoned_huge_page()
for hugepages.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Dean Nelson <dnelson@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 mm/memory-failure.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 2e94ad1133af..5785b59620ef 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1718,12 +1718,12 @@ int soft_offline_page(struct page *page, int flags)
 	} else { /* for free pages */
 		if (PageHuge(page)) {
 			set_page_hwpoison_huge_page(hpage);
-			dequeue_hwpoisoned_huge_page(hpage);
-			atomic_long_add(1 << compound_order(hpage),
+			if (!dequeue_hwpoisoned_huge_page(hpage))
+				atomic_long_add(1 << compound_order(hpage),
 					&num_poisoned_pages);
 		} else {
-			SetPageHWPoison(page);
-			atomic_long_inc(&num_poisoned_pages);
+			if (!TestSetPageHWPoison(page))
+				atomic_long_inc(&num_poisoned_pages);
 		}
 	}
 unset:
-- 
2.3.7

[PATCH 3.12 121/142] xen/console: Update console event channel on resume

[Jiri Slaby]

From: Boris Ostrovsky <boris.ostrovsky@oracle.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit b9d934f27c91b878c4b2e64299d6e419a4022f8d upstream.

After a resume the hypervisor/tools may change console event
channel number. We should re-query it.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/tty/hvc/hvc_xen.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index c193af6a628f..b4805adc50af 100644
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -299,11 +299,27 @@ static int xen_initial_domain_console_init(void)
 	return 0;
 }
 
+static void xen_console_update_evtchn(struct xencons_info *info)
+{
+	if (xen_hvm_domain()) {
+		uint64_t v;
+		int err;
+
+		err = hvm_get_parameter(HVM_PARAM_CONSOLE_EVTCHN, &v);
+		if (!err && v)
+			info->evtchn = v;
+	} else
+		info->evtchn = xen_start_info->console.domU.evtchn;
+}
+
 void xen_console_resume(void)
 {
 	struct xencons_info *info = vtermno_to_xencons(HVC_COOKIE);
-	if (info != NULL && info->irq)
+	if (info != NULL && info->irq) {
+		if (!xen_initial_domain())
+			xen_console_update_evtchn(info);
 		rebind_evtchn_irq(info->evtchn, info->irq);
+	}
 }
 
 static void xencons_disconnect_backend(struct xencons_info *info)
-- 
2.3.7

[PATCH 3.12 122/142] ARM: dts: imx25: Add #pwm-cells to pwm4

[Jiri Slaby]

From: Markus Pargmann <mpa@pengutronix.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit f90d3f0d0a11fa77918fd5497cb616dd2faa8431 upstream.

The property '#pwm-cells' is currently missing. It is not possible to
use pwm4 without this property.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Fixes: 5658a68fb578 ("ARM i.MX25: Add devicetree")
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm/boot/dts/imx25.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/imx25.dtsi b/arch/arm/boot/dts/imx25.dtsi
index cf3300a3071d..bfc327ff70af 100644
--- a/arch/arm/boot/dts/imx25.dtsi
+++ b/arch/arm/boot/dts/imx25.dtsi
@@ -411,6 +411,7 @@
 
 			pwm4: pwm@53fc8000 {
 				compatible = "fsl,imx25-pwm", "fsl,imx27-pwm";
+				#pwm-cells = <2>;
 				reg = <0x53fc8000 0x4000>;
 				clocks = <&clks 108>, <&clks 52>;
 				clock-names = "ipg", "per";
-- 
2.3.7

[PATCH 3.12 123/142] ARM: dts: imx28: Fix AUART4 TX-DMA interrupt name

[Jiri Slaby]

From: Marek Vasut <marex@denx.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 4ada77e37a773168fea484899201e272ab44ba8b upstream.

Fix a typo in the TX DMA interrupt name for AUART4.
This patch makes AUART4 operational again.

Signed-off-by: Marek Vasut <marex@denx.de>
Fixes: f30fb03d4d3a ("ARM: dts: add generic DMA device tree binding for mxs-dma")
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt | 2 +-
 arch/arm/boot/dts/imx28.dtsi                          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt b/Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt
index a4873e5e3e36..e30e184f50c7 100644
--- a/Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt
+++ b/Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt
@@ -38,7 +38,7 @@ dma_apbx: dma-apbx@80024000 {
 		      80 81 68 69
 		      70 71 72 73
 		      74 75 76 77>;
-	interrupt-names = "auart4-rx", "aurat4-tx", "spdif-tx", "empty",
+	interrupt-names = "auart4-rx", "auart4-tx", "spdif-tx", "empty",
 			  "saif0", "saif1", "i2c0", "i2c1",
 			  "auart0-rx", "auart0-tx", "auart1-rx", "auart1-tx",
 			  "auart2-rx", "auart2-tx", "auart3-rx", "auart3-tx";
diff --git a/arch/arm/boot/dts/imx28.dtsi b/arch/arm/boot/dts/imx28.dtsi
index 7363fded95ee..18132bba4260 100644
--- a/arch/arm/boot/dts/imx28.dtsi
+++ b/arch/arm/boot/dts/imx28.dtsi
@@ -761,7 +761,7 @@
 					      80 81 68 69
 					      70 71 72 73
 					      74 75 76 77>;
-				interrupt-names = "auart4-rx", "aurat4-tx", "spdif-tx", "empty",
+				interrupt-names = "auart4-rx", "auart4-tx", "spdif-tx", "empty",
 						  "saif0", "saif1", "i2c0", "i2c1",
 						  "auart0-rx", "auart0-tx", "auart1-rx", "auart1-tx",
 						  "auart2-rx", "auart2-tx", "auart3-rx", "auart3-tx";
-- 
2.3.7

[PATCH 3.12 124/142] ARM: dts: imx23-olinuxino: Fix dr_mode of usb0

[Jiri Slaby]

From: Stefan Wahren <stefan.wahren@i2se.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 0fdebe1a2f4d3a8fc03754022fabf8ba95e131a3 upstream.

The dr_mode of usb0 on imx233-olinuxino is left to default "otg".
Since the green LED (GPIO2_1) on imx233-olinuxino is connected to the
same pin as USB_OTG_ID it's possible to disable USB host by LED toggling:

echo 0 > /sys/class/leds/green/brightness
[ 1068.890000] ci_hdrc ci_hdrc.0: remove, state 1
[ 1068.890000] usb usb1: USB disconnect, device number 1
[ 1068.920000] usb 1-1: USB disconnect, device number 2
[ 1068.920000] usb 1-1.1: USB disconnect, device number 3
[ 1069.070000] usb 1-1.2: USB disconnect, device number 4
[ 1069.450000] ci_hdrc ci_hdrc.0: USB bus 1 deregistered
[ 1074.460000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11

This patch fixes the issue by setting dr_mode to "host" in the dts file.

Reported-by: Harald Geyer <harald@ccbib.org>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Acked-by: Peter Chen <peter.chen@freescale.com>
Fixes: b49312948285 ("ARM: dts: imx23-olinuxino: Add USB host support")
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm/boot/dts/imx23-olinuxino.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/imx23-olinuxino.dts b/arch/arm/boot/dts/imx23-olinuxino.dts
index fc766ae12e24..353d6f336212 100644
--- a/arch/arm/boot/dts/imx23-olinuxino.dts
+++ b/arch/arm/boot/dts/imx23-olinuxino.dts
@@ -93,6 +93,7 @@
 
 	ahb@80080000 {
 		usb0: usb@80080000 {
+			dr_mode = "host";
 			vbus-supply = <&reg_usb0_vbus>;
 			status = "okay";
 		};
-- 
2.3.7

[PATCH 3.12 125/142] ARM: dts: imx23-olinuxino: Fix polarity of LED GPIO

[Jiri Slaby]

From: Fabio Estevam <fabio.estevam@freescale.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit cfe8c59762244251fd9a5e281d48808095ff4090 upstream.

On imx23-olinuxino the LED turns on when level logic high is aplied to
GPIO2_1.

Fix the gpios property accordingly.

Fixes: b34aa1850244 ("ARM: dts: imx23-olinuxino: Remove unneeded "default-on"")
Reported-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm/boot/dts/imx23-olinuxino.dts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx23-olinuxino.dts b/arch/arm/boot/dts/imx23-olinuxino.dts
index 353d6f336212..a4b59727bff5 100644
--- a/arch/arm/boot/dts/imx23-olinuxino.dts
+++ b/arch/arm/boot/dts/imx23-olinuxino.dts
@@ -12,6 +12,7 @@
  */
 
 /dts-v1/;
+#include <dt-bindings/gpio/gpio.h>
 /include/ "imx23.dtsi"
 
 / {
@@ -120,7 +121,7 @@
 
 		user {
 			label = "green";
-			gpios = <&gpio2 1 1>;
+			gpios = <&gpio2 1 GPIO_ACTIVE_HIGH>;
 		};
 	};
 };
-- 
2.3.7

[PATCH 3.12 126/142] ARM: mvebu: armada-xp-openblocks-ax3-4: Disable internal RTC

[Jiri Slaby]

From: Gregory CLEMENT <gregory.clement@free-electrons.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 750e30d4076ae5e02ad13a376e96c95a2627742c upstream.

There is no crystal connected to the internal RTC on the Open Block
AX3. So let's disable it in order to prevent the kernel probing the
driver uselessly. Eventually this patches removes the following
warning message from the boot log:
"rtc-mv d0010300.rtc: internal RTC not ticking"

Acked-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts b/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts
index d6cce8aa8c68..3db86a6ec91b 100644
--- a/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts
+++ b/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts
@@ -69,6 +69,10 @@
 		};
 
 		internal-regs {
+			rtc@10300 {
+				/* No crystal connected to the internal RTC */
+				status = "disabled";
+			};
 			serial@12000 {
 				clock-frequency = <250000000>;
 				status = "okay";
-- 
2.3.7

[PATCH 3.12 127/142] ARM: ux500: Move GPIO regulator for SD-card into board DTSs

[Jiri Slaby]

From: Ulf Hansson <ulf.hansson@linaro.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 53d2669844263fd5fdc70f0eb6a2eb8a21086d8e upstream.

The GPIO regulator for the SD-card isn't a ux500 SOC configuration, but
instead it's specific to the board. Move the definition of it, into the
board DTSs.

Fixes: c94a4ab7af3f ("ARM: ux500: Disable the MMCI gpio-regulator by default")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm/boot/dts/ste-dbx5x0.dtsi  | 17 -----------------
 arch/arm/boot/dts/ste-href.dtsi    | 17 +++++++++++++++++
 arch/arm/boot/dts/ste-snowball.dts | 15 ++++++++++++++-
 3 files changed, 31 insertions(+), 18 deletions(-)

diff --git a/arch/arm/boot/dts/ste-dbx5x0.dtsi b/arch/arm/boot/dts/ste-dbx5x0.dtsi
index 1c1091eedade..faa64cd3ab73 100644
--- a/arch/arm/boot/dts/ste-dbx5x0.dtsi
+++ b/arch/arm/boot/dts/ste-dbx5x0.dtsi
@@ -774,23 +774,6 @@
 			status = "disabled";
 		 };
 
-		vmmci: regulator-gpio {
-			compatible = "regulator-gpio";
-
-			regulator-min-microvolt = <1800000>;
-			regulator-max-microvolt = <2900000>;
-			regulator-name = "mmci-reg";
-			regulator-type = "voltage";
-
-			startup-delay-us = <100>;
-			enable-active-high;
-
-			states = <1800000 0x1
-				  2900000 0x0>;
-
-			status = "disabled";
-		};
-
 		cryp@a03cb000 {
 			compatible = "stericsson,ux500-cryp";
 			reg = <0xa03cb000 0x1000>;
diff --git a/arch/arm/boot/dts/ste-href.dtsi b/arch/arm/boot/dts/ste-href.dtsi
index 370e03f5e7b2..b2d900157bb4 100644
--- a/arch/arm/boot/dts/ste-href.dtsi
+++ b/arch/arm/boot/dts/ste-href.dtsi
@@ -106,6 +106,23 @@
 			};
 		};
 
+		vmmci: regulator-gpio {
+			compatible = "regulator-gpio";
+
+			regulator-min-microvolt = <1800000>;
+			regulator-max-microvolt = <2900000>;
+			regulator-name = "mmci-reg";
+			regulator-type = "voltage";
+
+			startup-delay-us = <100>;
+			enable-active-high;
+
+			states = <1800000 0x1
+				  2900000 0x0>;
+
+			status = "disabled";
+		};
+
 		// External Micro SD slot
 		sdi0_per1@80126000 {
 			arm,primecell-periphid = <0x10480180>;
diff --git a/arch/arm/boot/dts/ste-snowball.dts b/arch/arm/boot/dts/ste-snowball.dts
index f1fc128e249d..3d85253369c7 100644
--- a/arch/arm/boot/dts/ste-snowball.dts
+++ b/arch/arm/boot/dts/ste-snowball.dts
@@ -121,10 +121,23 @@
 		};
 
 		vmmci: regulator-gpio {
+			compatible = "regulator-gpio";
+
 			gpios = <&gpio6 25 0x4>;
 			enable-gpio = <&gpio7 4 0x4>;
 
-			status = "okay";
+			regulator-min-microvolt = <1800000>;
+			regulator-max-microvolt = <2900000>;
+			regulator-name = "mmci-reg";
+			regulator-type = "voltage";
+
+			startup-delay-us = <100>;
+			enable-active-high;
+
+			states = <1800000 0x1
+				  2900000 0x0>;
+
+			status = "disabled";
 		};
 
 		// External Micro SD slot
-- 
2.3.7

[PATCH 3.12 128/142] ARM: ux500: Enable GPIO regulator for SD-card for HREF boards

[Jiri Slaby]

From: Ulf Hansson <ulf.hansson@linaro.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit f9a8c3914ba85f19c3360b19612d77c47adb8942 upstream.

Fixes: c94a4ab7af3f ("ARM: ux500: Disable the MMCI gpio-regulator by default")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm/boot/dts/ste-href.dtsi | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/arm/boot/dts/ste-href.dtsi b/arch/arm/boot/dts/ste-href.dtsi
index b2d900157bb4..592f5a400ca8 100644
--- a/arch/arm/boot/dts/ste-href.dtsi
+++ b/arch/arm/boot/dts/ste-href.dtsi
@@ -119,8 +119,6 @@
 
 			states = <1800000 0x1
 				  2900000 0x0>;
-
-			status = "disabled";
 		};
 
 		// External Micro SD slot
-- 
2.3.7

[PATCH 3.12 129/142] ARM: ux500: Enable GPIO regulator for SD-card for snowball

[Jiri Slaby]

From: Ulf Hansson <ulf.hansson@linaro.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 11133db7a836b0cb411faa048f07a38e994d1382 upstream.

Fixes: c94a4ab7af3f ("ARM: ux500: Disable the MMCI gpio-regulator by default")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm/boot/dts/ste-snowball.dts | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/arm/boot/dts/ste-snowball.dts b/arch/arm/boot/dts/ste-snowball.dts
index 3d85253369c7..51a6ad40f8a8 100644
--- a/arch/arm/boot/dts/ste-snowball.dts
+++ b/arch/arm/boot/dts/ste-snowball.dts
@@ -136,8 +136,6 @@
 
 			states = <1800000 0x1
 				  2900000 0x0>;
-
-			status = "disabled";
 		};
 
 		// External Micro SD slot
-- 
2.3.7

[PATCH 3.12 130/142] drm/i915: Add missing MacBook Pro models with dual channel LVDS

[Jiri Slaby]

From: Lukas Wunner <lukas@wunner.de>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 3916e3fd81021fb795bfbdb17f375b6b3685bced upstream.

Single channel LVDS maxes out at 112 MHz. The 15" pre-retina models
shipped with 1440x900 (106 MHz) by default or 1680x1050 (119 MHz)
as a BTO option, both versions used dual channel LVDS even though
the smaller one would have fit into a single channel.

Notes:
  Bug report showing that the MacBookPro8,2 with 1440x900 uses dual
  channel LVDS (this lead to it being hardcoded in intel_lvds.c by
  Daniel Vetter with commit 618563e3945b9d0864154bab3c607865b557cecc):
    https://bugzilla.kernel.org/show_bug.cgi?id=42842

  If i915.lvds_channel_mode=2 is missing even though the machine needs
  it, every other vertical line is white and consequently, only the left
  half of the screen is visible (verified by myself on a MacBookPro9,1).

  Forum posting concerning a MacBookPro6,2 with 1440x900, author is
  using i915.lvds_channel_mode=2 on the kernel command line, proving
  that the machine uses dual channels:
    https://bbs.archlinux.org/viewtopic.php?id=185770

  Chi Mei N154C6-L04 with 1440x900 is a replacement panel for all
  MacBook Pro "A1286" models, and that model number encompasses the
  MacBookPro6,2 / 8,2 / 9,1. Page 17 of the panel's datasheet shows it's
  driven with dual channel LVDS:
    http://www.ebay.com/itm/-/400690878560
    http://www.everymac.com/ultimate-mac-lookup/?search_keywords=A1286
    http://www.taopanel.com/chimei/datasheet/N154C6-L04.pdf

  Those three 15" models, MacBookPro6,2 / 8,2 / 9,1, are the only ones
  with i915 graphics and dual channel LVDS, so that list should be
  complete. And the 8,2 is already in intel_lvds.c.

  Possible motivation to use dual channel LVDS even on the 1440x900
  models: Reduce the number of different parts, i.e. use identical logic
  boards and display cabling on both versions and the only differing
  component is the panel.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Jani Nikula <jani.nikula@intel.com>
[Jani: included notes in the commit message for posterity]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/gpu/drm/i915/intel_lvds.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index e5473daab676..d5b601bcbf11 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -844,12 +844,28 @@ static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
 static const struct dmi_system_id intel_dual_link_lvds[] = {
 	{
 		.callback = intel_dual_link_lvds_callback,
-		.ident = "Apple MacBook Pro (Core i5/i7 Series)",
+		.ident = "Apple MacBook Pro 15\" (2010)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro6,2"),
+		},
+	},
+	{
+		.callback = intel_dual_link_lvds_callback,
+		.ident = "Apple MacBook Pro 15\" (2011)",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
 			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
 		},
 	},
+	{
+		.callback = intel_dual_link_lvds_callback,
+		.ident = "Apple MacBook Pro 15\" (2012)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro9,1"),
+		},
+	},
 	{ }	/* terminating entry */
 };
 
-- 
2.3.7

[PATCH 3.12 131/142] drm/radeon: disable semaphores for UVD V1 (v2)

[Jiri Slaby]

From: Christian König <christian.koenig@amd.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 013ead48a843442e63b9426e3bd5df18ca5d054a upstream.

Hardware doesn't seem to work correctly, just block userspace in this case.

v2: add missing defines

Bugs: https://bugs.freedesktop.org/show_bug.cgi?id=85320

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/gpu/drm/radeon/radeon_asic.c |  2 +-
 drivers/gpu/drm/radeon/radeon_asic.h |  4 ++++
 drivers/gpu/drm/radeon/rv770d.h      |  3 +++
 drivers/gpu/drm/radeon/uvd_v1_0.c    | 11 +----------
 drivers/gpu/drm/radeon/uvd_v2_2.c    | 29 +++++++++++++++++++++++++++++
 5 files changed, 38 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 5720e66da23c..9af20389c74e 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1157,7 +1157,7 @@ static struct radeon_asic rs780_asic = {
 static struct radeon_asic_ring rv770_uvd_ring = {
 	.ib_execute = &uvd_v1_0_ib_execute,
 	.emit_fence = &uvd_v2_2_fence_emit,
-	.emit_semaphore = &uvd_v1_0_semaphore_emit,
+	.emit_semaphore = &uvd_v2_2_semaphore_emit,
 	.cs_parse = &radeon_uvd_cs_parse,
 	.ring_test = &uvd_v1_0_ring_test,
 	.ib_test = &uvd_v1_0_ib_test,
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index 70c29d5e080d..afb7e2e6efcf 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -812,6 +812,10 @@ void uvd_v1_0_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib);
 int uvd_v2_2_resume(struct radeon_device *rdev);
 void uvd_v2_2_fence_emit(struct radeon_device *rdev,
 			 struct radeon_fence *fence);
+bool uvd_v2_2_semaphore_emit(struct radeon_device *rdev,
+			     struct radeon_ring *ring,
+			     struct radeon_semaphore *semaphore,
+			     bool emit_wait);
 
 /* uvd v3.1 */
 void uvd_v3_1_semaphore_emit(struct radeon_device *rdev,
diff --git a/drivers/gpu/drm/radeon/rv770d.h b/drivers/gpu/drm/radeon/rv770d.h
index 1ae277152cc7..68ae18940b7a 100644
--- a/drivers/gpu/drm/radeon/rv770d.h
+++ b/drivers/gpu/drm/radeon/rv770d.h
@@ -982,6 +982,9 @@
 			 ((n) & 0x3FFF) << 16)
 
 /* UVD */
+#define UVD_SEMA_ADDR_LOW				0xef00
+#define UVD_SEMA_ADDR_HIGH				0xef04
+#define UVD_SEMA_CMD					0xef08
 #define UVD_GPCOM_VCPU_CMD				0xef0c
 #define UVD_GPCOM_VCPU_DATA0				0xef10
 #define UVD_GPCOM_VCPU_DATA1				0xef14
diff --git a/drivers/gpu/drm/radeon/uvd_v1_0.c b/drivers/gpu/drm/radeon/uvd_v1_0.c
index f680f5ffbdeb..4bfea2dbb8c5 100644
--- a/drivers/gpu/drm/radeon/uvd_v1_0.c
+++ b/drivers/gpu/drm/radeon/uvd_v1_0.c
@@ -365,16 +365,7 @@ void uvd_v1_0_semaphore_emit(struct radeon_device *rdev,
 			     struct radeon_semaphore *semaphore,
 			     bool emit_wait)
 {
-	uint64_t addr = semaphore->gpu_addr;
-
-	radeon_ring_write(ring, PACKET0(UVD_SEMA_ADDR_LOW, 0));
-	radeon_ring_write(ring, (addr >> 3) & 0x000FFFFF);
-
-	radeon_ring_write(ring, PACKET0(UVD_SEMA_ADDR_HIGH, 0));
-	radeon_ring_write(ring, (addr >> 23) & 0x000FFFFF);
-
-	radeon_ring_write(ring, PACKET0(UVD_SEMA_CMD, 0));
-	radeon_ring_write(ring, emit_wait ? 1 : 0);
+	/* disable semaphores for UVD V1 hardware */
 }
 
 /**
diff --git a/drivers/gpu/drm/radeon/uvd_v2_2.c b/drivers/gpu/drm/radeon/uvd_v2_2.c
index 824550db3fed..207e8cf32ae1 100644
--- a/drivers/gpu/drm/radeon/uvd_v2_2.c
+++ b/drivers/gpu/drm/radeon/uvd_v2_2.c
@@ -61,6 +61,35 @@ void uvd_v2_2_fence_emit(struct radeon_device *rdev,
 }
 
 /**
+ * uvd_v2_2_semaphore_emit - emit semaphore command
+ *
+ * @rdev: radeon_device pointer
+ * @ring: radeon_ring pointer
+ * @semaphore: semaphore to emit commands for
+ * @emit_wait: true if we should emit a wait command
+ *
+ * Emit a semaphore command (either wait or signal) to the UVD ring.
+ */
+bool uvd_v2_2_semaphore_emit(struct radeon_device *rdev,
+			     struct radeon_ring *ring,
+			     struct radeon_semaphore *semaphore,
+			     bool emit_wait)
+{
+	uint64_t addr = semaphore->gpu_addr;
+
+	radeon_ring_write(ring, PACKET0(UVD_SEMA_ADDR_LOW, 0));
+	radeon_ring_write(ring, (addr >> 3) & 0x000FFFFF);
+
+	radeon_ring_write(ring, PACKET0(UVD_SEMA_ADDR_HIGH, 0));
+	radeon_ring_write(ring, (addr >> 23) & 0x000FFFFF);
+
+	radeon_ring_write(ring, PACKET0(UVD_SEMA_CMD, 0));
+	radeon_ring_write(ring, emit_wait ? 1 : 0);
+
+	return true;
+}
+
+/**
  * uvd_v2_2_resume - memory controller programming
  *
  * @rdev: radeon_device pointer
-- 
2.3.7

[PATCH 3.12 132/142] drm/radeon: make UVD handle checking more strict

[Jiri Slaby]

From: Christian König <christian.koenig@amd.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit a1b403da70e038ca6c6c6fe434d1d873546873a3 upstream.

Invalid messages can crash the hw otherwise.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/gpu/drm/radeon/radeon_uvd.c | 72 ++++++++++++++++++++++---------------
 1 file changed, 43 insertions(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_uvd.c b/drivers/gpu/drm/radeon/radeon_uvd.c
index a656b1a7e10a..a8cc5ff8e48f 100644
--- a/drivers/gpu/drm/radeon/radeon_uvd.c
+++ b/drivers/gpu/drm/radeon/radeon_uvd.c
@@ -387,50 +387,64 @@ static int radeon_uvd_cs_msg(struct radeon_cs_parser *p, struct radeon_bo *bo,
 		return -EINVAL;
 	}
 
-	if (msg_type == 1) {
+	switch (msg_type) {
+	case 0:
+		/* it's a create msg, calc image size (width * height) */
+		img_size = msg[7] * msg[8];
+		radeon_bo_kunmap(bo);
+
+		/* try to alloc a new handle */
+		for (i = 0; i < RADEON_MAX_UVD_HANDLES; ++i) {
+			if (atomic_read(&p->rdev->uvd.handles[i]) == handle) {
+				DRM_ERROR("Handle 0x%x already in use!\n", handle);
+				return -EINVAL;
+			}
+
+			if (!atomic_cmpxchg(&p->rdev->uvd.handles[i], 0, handle)) {
+				p->rdev->uvd.filp[i] = p->filp;
+				p->rdev->uvd.img_size[i] = img_size;
+				return 0;
+			}
+		}
+
+		DRM_ERROR("No more free UVD handles!\n");
+		return -EINVAL;
+
+	case 1:
 		/* it's a decode msg, calc buffer sizes */
 		r = radeon_uvd_cs_msg_decode(msg, buf_sizes);
-		/* calc image size (width * height) */
-		img_size = msg[6] * msg[7];
 		radeon_bo_kunmap(bo);
 		if (r)
 			return r;
 
-	} else if (msg_type == 2) {
+		/* validate the handle */
+		for (i = 0; i < RADEON_MAX_UVD_HANDLES; ++i) {
+			if (atomic_read(&p->rdev->uvd.handles[i]) == handle) {
+				if (p->rdev->uvd.filp[i] != p->filp) {
+					DRM_ERROR("UVD handle collision detected!\n");
+					return -EINVAL;
+				}
+				return 0;
+			}
+		}
+
+		DRM_ERROR("Invalid UVD handle 0x%x!\n", handle);
+		return -ENOENT;
+
+	case 2:
 		/* it's a destroy msg, free the handle */
 		for (i = 0; i < RADEON_MAX_UVD_HANDLES; ++i)
 			atomic_cmpxchg(&p->rdev->uvd.handles[i], handle, 0);
 		radeon_bo_kunmap(bo);
 		return 0;
-	} else {
-		/* it's a create msg, calc image size (width * height) */
-		img_size = msg[7] * msg[8];
-		radeon_bo_kunmap(bo);
 
-		if (msg_type != 0) {
-			DRM_ERROR("Illegal UVD message type (%d)!\n", msg_type);
-			return -EINVAL;
-		}
-
-		/* it's a create msg, no special handling needed */
-	}
-
-	/* create or decode, validate the handle */
-	for (i = 0; i < RADEON_MAX_UVD_HANDLES; ++i) {
-		if (atomic_read(&p->rdev->uvd.handles[i]) == handle)
-			return 0;
-	}
+	default:
 
-	/* handle not found try to alloc a new one */
-	for (i = 0; i < RADEON_MAX_UVD_HANDLES; ++i) {
-		if (!atomic_cmpxchg(&p->rdev->uvd.handles[i], 0, handle)) {
-			p->rdev->uvd.filp[i] = p->filp;
-			p->rdev->uvd.img_size[i] = img_size;
-			return 0;
-		}
+		DRM_ERROR("Illegal UVD message type (%d)!\n", msg_type);
+		return -EINVAL;
 	}
 
-	DRM_ERROR("No more free UVD handles!\n");
+	BUG();
 	return -EINVAL;
 }
 
-- 
2.3.7

[PATCH 3.12 133/142] drm/radeon: more strictly validate the UVD codec

[Jiri Slaby]

From: Christian König <christian.koenig@amd.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit d52cdfa4a0c6406bbfb33206341eaf1fb1555994 upstream.

MPEG 2/4 are only supported since UVD3.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/gpu/drm/radeon/radeon_uvd.c | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_uvd.c b/drivers/gpu/drm/radeon/radeon_uvd.c
index a8cc5ff8e48f..b84c561c6084 100644
--- a/drivers/gpu/drm/radeon/radeon_uvd.c
+++ b/drivers/gpu/drm/radeon/radeon_uvd.c
@@ -349,6 +349,29 @@ static int radeon_uvd_cs_msg_decode(uint32_t *msg, unsigned buf_sizes[])
 	return 0;
 }
 
+static int radeon_uvd_validate_codec(struct radeon_cs_parser *p,
+				     unsigned stream_type)
+{
+	switch (stream_type) {
+	case 0: /* H264 */
+	case 1: /* VC1 */
+		/* always supported */
+		return 0;
+
+	case 3: /* MPEG2 */
+	case 4: /* MPEG4 */
+		/* only since UVD 3 */
+		if (p->rdev->family >= CHIP_PALM)
+			return 0;
+
+		/* fall through */
+	default:
+		DRM_ERROR("UVD codec not supported by hardware %d!\n",
+			  stream_type);
+		return -EINVAL;
+	}
+}
+
 static int radeon_uvd_cs_msg(struct radeon_cs_parser *p, struct radeon_bo *bo,
 			     unsigned offset, unsigned buf_sizes[])
 {
@@ -391,7 +414,11 @@ static int radeon_uvd_cs_msg(struct radeon_cs_parser *p, struct radeon_bo *bo,
 	case 0:
 		/* it's a create msg, calc image size (width * height) */
 		img_size = msg[7] * msg[8];
+
+		r = radeon_uvd_validate_codec(p, msg[4]);
 		radeon_bo_kunmap(bo);
+		if (r)
+			return r;
 
 		/* try to alloc a new handle */
 		for (i = 0; i < RADEON_MAX_UVD_HANDLES; ++i) {
@@ -411,8 +438,10 @@ static int radeon_uvd_cs_msg(struct radeon_cs_parser *p, struct radeon_bo *bo,
 		return -EINVAL;
 
 	case 1:
-		/* it's a decode msg, calc buffer sizes */
-		r = radeon_uvd_cs_msg_decode(msg, buf_sizes);
+		/* it's a decode msg, validate codec and calc buffer sizes */
+		r = radeon_uvd_validate_codec(p, msg[4]);
+		if (!r)
+			r = radeon_uvd_cs_msg_decode(msg, buf_sizes);
 		radeon_bo_kunmap(bo);
 		if (r)
 			return r;
-- 
2.3.7

[PATCH 3.12 134/142] pinctrl: Don't just pretend to protect pinctrl_maps, do it for real

[Jiri Slaby]

From: Doug Anderson <dianders@chromium.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit c5272a28566b00cce79127ad382406e0a8650690 upstream.

Way back, when the world was a simpler place and there was no war, no
evil, and no kernel bugs, there was just a single pinctrl lock.  That
was how the world was when (57291ce pinctrl: core device tree mapping
table parsing support) was written.  In that case, there were
instances where the pinctrl mutex was already held when
pinctrl_register_map() was called, hence a "locked" parameter was
passed to the function to indicate that the mutex was already locked
(so we shouldn't lock it again).

A few years ago in (42fed7b pinctrl: move subsystem mutex to
pinctrl_dev struct), we switched to a separate pinctrl_maps_mutex.
...but (oops) we forgot to re-think about the whole "locked" parameter
for pinctrl_register_map().  Basically the "locked" parameter appears
to still refer to whether the bigger pinctrl_dev mutex is locked, but
we're using it to skip locks of our (now separate) pinctrl_maps_mutex.

That's kind of a bad thing(TM).  Probably nobody noticed because most
of the calls to pinctrl_register_map happen at boot time and we've got
synchronous device probing.  ...and even cases where we're
asynchronous don't end up actually hitting the race too often.  ...but
after banging my head against the wall for a bug that reproduced 1 out
of 1000 reboots and lots of looking through kgdb, I finally noticed
this.

Anyway, we can now safely remove the "locked" parameter and go back to
a war-free, evil-free, and kernel-bug-free world.

Fixes: 42fed7ba44e4 ("pinctrl: move subsystem mutex to pinctrl_dev struct")
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/pinctrl/core.c       | 10 ++++------
 drivers/pinctrl/core.h       |  2 +-
 drivers/pinctrl/devicetree.c |  2 +-
 3 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 260a2551d612..c4e0f1e17663 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -1107,7 +1107,7 @@ void devm_pinctrl_put(struct pinctrl *p)
 EXPORT_SYMBOL_GPL(devm_pinctrl_put);
 
 int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps,
-			 bool dup, bool locked)
+			 bool dup)
 {
 	int i, ret;
 	struct pinctrl_maps *maps_node;
@@ -1175,11 +1175,9 @@ int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps,
 		maps_node->maps = maps;
 	}
 
-	if (!locked)
-		mutex_lock(&pinctrl_maps_mutex);
+	mutex_lock(&pinctrl_maps_mutex);
 	list_add_tail(&maps_node->node, &pinctrl_maps);
-	if (!locked)
-		mutex_unlock(&pinctrl_maps_mutex);
+	mutex_unlock(&pinctrl_maps_mutex);
 
 	return 0;
 }
@@ -1194,7 +1192,7 @@ int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps,
 int pinctrl_register_mappings(struct pinctrl_map const *maps,
 			      unsigned num_maps)
 {
-	return pinctrl_register_map(maps, num_maps, true, false);
+	return pinctrl_register_map(maps, num_maps, true);
 }
 
 void pinctrl_unregister_map(struct pinctrl_map const *map)
diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h
index 75476b3d87da..b24ea846c867 100644
--- a/drivers/pinctrl/core.h
+++ b/drivers/pinctrl/core.h
@@ -183,7 +183,7 @@ static inline struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev,
 }
 
 int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps,
-			 bool dup, bool locked);
+			 bool dup);
 void pinctrl_unregister_map(struct pinctrl_map const *map);
 
 extern int pinctrl_force_sleep(struct pinctrl_dev *pctldev);
diff --git a/drivers/pinctrl/devicetree.c b/drivers/pinctrl/devicetree.c
index 340fb4e6c600..fd91c4c31f6b 100644
--- a/drivers/pinctrl/devicetree.c
+++ b/drivers/pinctrl/devicetree.c
@@ -92,7 +92,7 @@ static int dt_remember_or_free_map(struct pinctrl *p, const char *statename,
 	dt_map->num_maps = num_maps;
 	list_add_tail(&dt_map->node, &p->dt_maps);
 
-	return pinctrl_register_map(map, num_maps, false, true);
+	return pinctrl_register_map(map, num_maps, false);
 }
 
 struct pinctrl_dev *of_pinctrl_get(struct device_node *np)
-- 
2.3.7

[PATCH 3.12 135/142] mmc: card: Don't access RPMB partitions for normal read/write

[Jiri Slaby]

From: Chuanxiao Dong <chuanxiao.dong@intel.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 4e93b9a6abc0d028daf3c8a00cb77b679d8a4df4 upstream.

During kernel boot, it will try to read some logical sectors
of each block device node for the possible partition table.

But since RPMB partition is special and can not be accessed
by normal eMMC read / write CMDs, it will cause below error
messages during kernel boot:
...
 mmc0: Got data interrupt 0x00000002 even though no data operation was in progress.
 mmcblk0rpmb: error -110 transferring data, sector 0, nr 32, cmd response 0x900, card status 0xb00
 mmcblk0rpmb: retrying using single block read
 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900
 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900
 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900
 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900
 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900
 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900
 end_request: I/O error, dev mmcblk0rpmb, sector 0
 Buffer I/O error on device mmcblk0rpmb, logical block 0
 end_request: I/O error, dev mmcblk0rpmb, sector 8
 Buffer I/O error on device mmcblk0rpmb, logical block 1
 end_request: I/O error, dev mmcblk0rpmb, sector 16
 Buffer I/O error on device mmcblk0rpmb, logical block 2
 end_request: I/O error, dev mmcblk0rpmb, sector 24
 Buffer I/O error on device mmcblk0rpmb, logical block 3
...

This patch will discard the access request in eMMC queue if
it is RPMB partition access request. By this way, it avoids
trigger above error messages.

Fixes: 090d25fe224c ("mmc: core: Expose access to RPMB partition")
Signed-off-by: Yunpeng Gao <yunpeng.gao@intel.com>
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Tested-by: Michael Shigorin <mike@altlinux.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/mmc/card/block.c | 12 ++++++++++++
 drivers/mmc/card/queue.c |  2 +-
 drivers/mmc/card/queue.h |  2 ++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 2aea365e096e..fb5662709a8f 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -951,6 +951,18 @@ static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
 	md->reset_done &= ~type;
 }
 
+int mmc_access_rpmb(struct mmc_queue *mq)
+{
+	struct mmc_blk_data *md = mq->data;
+	/*
+	 * If this is a RPMB partition access, return ture
+	 */
+	if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
+		return true;
+
+	return false;
+}
+
 static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
 {
 	struct mmc_blk_data *md = mq->data;
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index fa9632eb63f1..e7e98eb862d9 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -37,7 +37,7 @@ static int mmc_prep_request(struct request_queue *q, struct request *req)
 		return BLKPREP_KILL;
 	}
 
-	if (mq && mmc_card_removed(mq->card))
+	if (mq && (mmc_card_removed(mq->card) || mmc_access_rpmb(mq)))
 		return BLKPREP_KILL;
 
 	req->cmd_flags |= REQ_DONTPREP;
diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h
index 5752d50049a3..99e6521e6169 100644
--- a/drivers/mmc/card/queue.h
+++ b/drivers/mmc/card/queue.h
@@ -73,4 +73,6 @@ extern void mmc_queue_bounce_post(struct mmc_queue_req *);
 extern int mmc_packed_init(struct mmc_queue *, struct mmc_card *);
 extern void mmc_packed_clean(struct mmc_queue *);
 
+extern int mmc_access_rpmb(struct mmc_queue *);
+
 #endif
-- 
2.3.7

[PATCH 3.12 136/142] mmc: core: add missing pm event in mmc_pm_notify to fix hib restore

[Jiri Slaby]

From: Grygorii Strashko <Grygorii.Strashko@linaro.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 184af16b09360d6273fd6160e6ff7f8e2482ef23 upstream.

The PM_RESTORE_PREPARE is not handled now in mmc_pm_notify(),
as result mmc_rescan() could be scheduled and executed at
late hibernation restore stages when MMC device is suspended
already - which, in turn, will lead to system crash on TI dra7-evm board:

WARNING: CPU: 0 PID: 3188 at drivers/bus/omap_l3_noc.c:148 l3_interrupt_handler+0x258/0x374()
44000000.ocp:L3 Custom Error: MASTER MPU TARGET L4_PER1_P3 (Idle): Data Access in User mode during Functional access

Hence, add missed PM_RESTORE_PREPARE PM event in mmc_pm_notify().

Fixes: 4c2ef25fe0b8 (mmc: fix all hangs related to mmc/sd card...)
Signed-off-by: Grygorii Strashko <Grygorii.Strashko@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/mmc/core/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index bf18b6bfce48..e743d3984d29 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2694,6 +2694,7 @@ int mmc_pm_notify(struct notifier_block *notify_block,
 	switch (mode) {
 	case PM_HIBERNATION_PREPARE:
 	case PM_SUSPEND_PREPARE:
+	case PM_RESTORE_PREPARE:
 		spin_lock_irqsave(&host->lock, flags);
 		host->rescan_disable = 1;
 		spin_unlock_irqrestore(&host->lock, flags);
-- 
2.3.7

[PATCH 3.12 137/142] mmc: sh_mmcif: Fix timeout value for command request

[Jiri Slaby]

From: Takeshi Kihara <takeshi.kihara.df@renesas.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit bad4371d87d1d1ed1aecd9c9cc21c41ac3f289c8 upstream.

f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")
changed the timeout value from 1000 jiffies to 1s. In the case where
HZ is 1000 the values are the same. However, for smaller HZ values the
timeout is now smaller, 1s instead of 10s in the case of HZ=100.

Since the timeout occurs in spite of a normal data transfer a timeout of
10s seems more appropriate. This restores the previous timeout in the
case where HZ=100 and results in an increase over the previous timeout
for larger values of HZ.

Fixes: f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
[horms: rewrote changelog to refer to HZ]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/mmc/host/sh_mmcif.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 36629a024aa1..5b4f1e163e00 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -1399,7 +1399,7 @@ static int sh_mmcif_probe(struct platform_device *pdev)
 	host		= mmc_priv(mmc);
 	host->mmc	= mmc;
 	host->addr	= reg;
-	host->timeout	= msecs_to_jiffies(1000);
+	host->timeout	= msecs_to_jiffies(10000);
 	host->ccs_enable = !pd || !pd->ccs_unsupported;
 	host->clk_ctrl2_enable = pd && pd->clk_ctrl2_present;
 
-- 
2.3.7

[PATCH 3.12 138/142] sound/oss: fix deadlock in sequencer_ioctl(SNDCTL_SEQ_OUTOFBAND)

[Jiri Slaby]

From: Alexey Khoroshilov <khoroshilov@ispras.ru>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit bc26d4d06e337ade069f33d3f4377593b24e6e36 upstream.

A deadlock can be initiated by userspace via ioctl(SNDCTL_SEQ_OUTOFBAND)
on /dev/sequencer with TMR_ECHO midi event.

In this case the control flow is:
sound_ioctl()
-> case SND_DEV_SEQ:
   case SND_DEV_SEQ2:
     sequencer_ioctl()
     -> case SNDCTL_SEQ_OUTOFBAND:
          spin_lock_irqsave(&lock,flags);
          play_event();
          -> case EV_TIMING:
               seq_timing_event()
               -> case TMR_ECHO:
                    seq_copy_to_input()
                    -> spin_lock_irqsave(&lock,flags);

It seems that spin_lock_irqsave() around play_event() is not necessary,
because the only other call location in seq_startplay() makes the call
without acquiring spinlock.

So, the patch just removes spinlocks around play_event().
By the way, it removes unreachable code in seq_timing_event(),
since (seq_mode == SEQ_2) case is handled in the beginning.

Compile tested only.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 sound/oss/sequencer.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/sound/oss/sequencer.c b/sound/oss/sequencer.c
index 4ff60a6427d9..2e67dd590be5 100644
--- a/sound/oss/sequencer.c
+++ b/sound/oss/sequencer.c
@@ -683,13 +683,8 @@ static int seq_timing_event(unsigned char *event_rec)
 			break;
 
 		case TMR_ECHO:
-			if (seq_mode == SEQ_2)
-				seq_copy_to_input(event_rec, 8);
-			else
-			{
-				parm = (parm << 8 | SEQ_ECHO);
-				seq_copy_to_input((unsigned char *) &parm, 4);
-			}
+			parm = (parm << 8 | SEQ_ECHO);
+			seq_copy_to_input((unsigned char *) &parm, 4);
 			break;
 
 		default:;
@@ -1332,7 +1327,6 @@ int sequencer_ioctl(int dev, struct file *file, unsigned int cmd, void __user *a
 	int mode = translate_mode(file);
 	struct synth_info inf;
 	struct seq_event_rec event_rec;
-	unsigned long flags;
 	int __user *p = arg;
 
 	orig_dev = dev = dev >> 4;
@@ -1487,9 +1481,7 @@ int sequencer_ioctl(int dev, struct file *file, unsigned int cmd, void __user *a
 		case SNDCTL_SEQ_OUTOFBAND:
 			if (copy_from_user(&event_rec, arg, sizeof(event_rec)))
 				return -EFAULT;
-			spin_lock_irqsave(&lock,flags);
 			play_event(event_rec.arr);
-			spin_unlock_irqrestore(&lock,flags);
 			return 0;
 
 		case SNDCTL_MIDI_INFO:
-- 
2.3.7

[PATCH 3.12 139/142] ACPICA: Tables: Change acpi_find_root_pointer() to use acpi_physical_address.

[Jiri Slaby]

From: Lv Zheng <lv.zheng@intel.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit f254e3c57b9d952e987502aefa0804c177dd2503 upstream.

ACPICA commit 7d9fd64397d7c38899d3dc497525f6e6b044e0e3

OSPMs like Linux expect an acpi_physical_address returning value from
acpi_find_root_pointer(). This triggers warnings if sizeof (acpi_size) doesn't
equal to sizeof (acpi_physical_address):
  drivers/acpi/osl.c:275:3: warning: passing argument 1 of 'acpi_find_root_pointer' from incompatible pointer type [enabled by default]
  In file included from include/acpi/acpi.h:64:0,
                   from include/linux/acpi.h:36,
                   from drivers/acpi/osl.c:41:
  include/acpi/acpixf.h:433:1: note: expected 'acpi_size *' but argument is of type 'acpi_physical_address *'
This patch corrects acpi_find_root_pointer().

Link: https://github.com/acpica/acpica/commit/7d9fd643
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Dirk Behme <dirk.behme@gmail.com>
Signed-off-by: George G. Davis <george_davis@mentor.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/acpi/acpica/tbxfroot.c | 7 ++++---
 include/acpi/acpixf.h          | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/acpica/tbxfroot.c b/drivers/acpi/acpica/tbxfroot.c
index 948c95e80d44..cd5d08a177fe 100644
--- a/drivers/acpi/acpica/tbxfroot.c
+++ b/drivers/acpi/acpica/tbxfroot.c
@@ -112,7 +112,7 @@ acpi_status acpi_tb_validate_rsdp(struct acpi_table_rsdp *rsdp)
  *
  ******************************************************************************/
 
-acpi_status acpi_find_root_pointer(acpi_size *table_address)
+acpi_status acpi_find_root_pointer(acpi_physical_address * table_address)
 {
 	u8 *table_ptr;
 	u8 *mem_rover;
@@ -170,7 +170,8 @@ acpi_status acpi_find_root_pointer(acpi_size *table_address)
 			physical_address +=
 			    (u32) ACPI_PTR_DIFF(mem_rover, table_ptr);
 
-			*table_address = physical_address;
+			*table_address =
+			    (acpi_physical_address) physical_address;
 			return_ACPI_STATUS(AE_OK);
 		}
 	}
@@ -203,7 +204,7 @@ acpi_status acpi_find_root_pointer(acpi_size *table_address)
 		    (ACPI_HI_RSDP_WINDOW_BASE +
 		     ACPI_PTR_DIFF(mem_rover, table_ptr));
 
-		*table_address = physical_address;
+		*table_address = (acpi_physical_address) physical_address;
 		return_ACPI_STATUS(AE_OK);
 	}
 
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 85bfdbe17805..d62dfc745d8a 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -181,7 +181,7 @@ acpi_status acpi_load_tables(void);
  */
 acpi_status acpi_reallocate_root_table(void);
 
-acpi_status acpi_find_root_pointer(acpi_size *rsdp_address);
+acpi_status acpi_find_root_pointer(acpi_physical_address * rsdp_address);
 
 acpi_status acpi_unload_table_id(acpi_owner_id id);
 
-- 
2.3.7

[PATCH 3.12 140/142] ACPICA: Utilities: Cleanup to enforce ACPI_PHYSADDR_TO_PTR()/ACPI_PTR_TO_PHYSADDR().

[Jiri Slaby]

From: Lv Zheng <lv.zheng@intel.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 6d3fd3cc33d50e4c0d0c0bd172de02caaec3127c upstream.

ACPICA commit 154f6d074dd38d6ebc0467ad454454e6c5c9ecdf

There are code pieces converting pointers using "(acpi_physical_address) x"
or "ACPI_CAST_PTR (t, x)" formats, this patch cleans up them.

Known issues:
1. Cleanup of "(ACPI_PHYSICAL_ADDRRESS) x" for a table field
   For the conversions around the table fields, it is better to fix it with
   alignment also fixed. So this patch doesn't modify such code. There
   should be no functional problem by leaving them unchanged.

Link: https://github.com/acpica/acpica/commit/154f6d07
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Dirk Behme <dirk.behme@gmail.com>
Signed-off-by: George G. Davis <george_davis@mentor.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/acpi/acpica/dsopcode.c | 3 +--
 drivers/acpi/acpica/tbinstal.c | 5 ++---
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/acpica/dsopcode.c b/drivers/acpi/acpica/dsopcode.c
index 1fc1ff114f26..541b851a8727 100644
--- a/drivers/acpi/acpica/dsopcode.c
+++ b/drivers/acpi/acpica/dsopcode.c
@@ -539,8 +539,7 @@ acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,
 		return_ACPI_STATUS(AE_NOT_EXIST);
 	}
 
-	obj_desc->region.address =
-	    (acpi_physical_address) ACPI_TO_INTEGER(table);
+	obj_desc->region.address = ACPI_PTR_TO_PHYSADDR(table);
 	obj_desc->region.length = table->length;
 
 	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c
index 42a13c0d7015..52a4b8ecf4de 100644
--- a/drivers/acpi/acpica/tbinstal.c
+++ b/drivers/acpi/acpica/tbinstal.c
@@ -300,8 +300,7 @@ struct acpi_table_header *acpi_tb_table_override(struct acpi_table_header
 			ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
 					"%4.4s %p Attempted physical table override failed",
 					table_header->signature,
-					ACPI_CAST_PTR(void,
-						      table_desc->address)));
+					ACPI_PHYSADDR_TO_PTR(table_desc->address)));
 			return (NULL);
 		}
 
@@ -317,7 +316,7 @@ struct acpi_table_header *acpi_tb_table_override(struct acpi_table_header
 	ACPI_INFO((AE_INFO,
 		   "%4.4s %p %s table override, new table: %p",
 		   table_header->signature,
-		   ACPI_CAST_PTR(void, table_desc->address),
+		   ACPI_PHYSADDR_TO_PTR(table_desc->address),
 		   override_type, new_table));
 
 	/* We can now unmap/delete the original table (if fully mapped) */
-- 
2.3.7

[PATCH 3.12 141/142] ACPICA: Utilities: Cleanup to convert physical address printing formats.

[Jiri Slaby]

From: Lv Zheng <lv.zheng@intel.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit cc2080b0e5a7c6c33ef5e9ffccbc2b8f6f861393 upstream.

ACPICA commit 7f06739db43a85083a70371c14141008f20b2198

For physical addresses, since the address may exceed 32-bit address range
after calculation, we should use %8.8X%8.8X (see ACPI_FORMAT_UINT64()) to
convert the %p formats.

This is a preparation to switch acpi_physical_address to 64-bit on 32-bit
kernel builds.

Link: https://github.com/acpica/acpica/commit/7f06739d
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Dirk Behme <dirk.behme@gmail.com>
[gdavis: Apply changes to drivers/acpi/acpica/{tbutils,tbxfload}.c]
Signed-off-by: George G. Davis <george_davis@mentor.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/acpi/acpica/exfldio.c   | 10 ++++------
 drivers/acpi/acpica/hwvalid.c   | 16 ++++++++--------
 drivers/acpi/acpica/nsdump.c    |  7 +++----
 drivers/acpi/acpica/tbutils.c   |  4 ++--
 drivers/acpi/acpica/tbxfload.c  |  7 +++----
 drivers/acpi/acpica/utaddress.c | 24 +++++++++++-------------
 6 files changed, 31 insertions(+), 37 deletions(-)

diff --git a/drivers/acpi/acpica/exfldio.c b/drivers/acpi/acpica/exfldio.c
index 7e0afe72487e..61d753dc338f 100644
--- a/drivers/acpi/acpica/exfldio.c
+++ b/drivers/acpi/acpica/exfldio.c
@@ -269,17 +269,15 @@ acpi_ex_access_region(union acpi_operand_object *obj_desc,
 	}
 
 	ACPI_DEBUG_PRINT_RAW((ACPI_DB_BFIELD,
-			      " Region [%s:%X], Width %X, ByteBase %X, Offset %X at %p\n",
+			      " Region [%s:%X], Width %X, ByteBase %X, Offset %X at %8.8X%8.8X\n",
 			      acpi_ut_get_region_name(rgn_desc->region.
 						      space_id),
 			      rgn_desc->region.space_id,
 			      obj_desc->common_field.access_byte_width,
 			      obj_desc->common_field.base_byte_offset,
-			      field_datum_byte_offset, ACPI_CAST_PTR(void,
-								     (rgn_desc->
-								      region.
-								      address +
-								      region_offset))));
+			      field_datum_byte_offset,
+			      ACPI_FORMAT_UINT64(rgn_desc->region.address +
+						 region_offset)));
 
 	/* Invoke the appropriate address_space/op_region handler */
 
diff --git a/drivers/acpi/acpica/hwvalid.c b/drivers/acpi/acpica/hwvalid.c
index eab70d58852a..fae57584a182 100644
--- a/drivers/acpi/acpica/hwvalid.c
+++ b/drivers/acpi/acpica/hwvalid.c
@@ -142,17 +142,17 @@ acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
 	byte_width = ACPI_DIV_8(bit_width);
 	last_address = address + byte_width - 1;
 
-	ACPI_DEBUG_PRINT((ACPI_DB_IO, "Address %p LastAddress %p Length %X",
-			  ACPI_CAST_PTR(void, address), ACPI_CAST_PTR(void,
-								      last_address),
-			  byte_width));
+	ACPI_DEBUG_PRINT((ACPI_DB_IO,
+			  "Address %8.8X%8.8X LastAddress %8.8X%8.8X Length %X",
+			  ACPI_FORMAT_UINT64(address),
+			  ACPI_FORMAT_UINT64(last_address), byte_width));
 
 	/* Maximum 16-bit address in I/O space */
 
 	if (last_address > ACPI_UINT16_MAX) {
 		ACPI_ERROR((AE_INFO,
-			    "Illegal I/O port address/length above 64K: %p/0x%X",
-			    ACPI_CAST_PTR(void, address), byte_width));
+			    "Illegal I/O port address/length above 64K: %8.8X%8.8X/0x%X",
+			    ACPI_FORMAT_UINT64(address), byte_width));
 		return_ACPI_STATUS(AE_LIMIT);
 	}
 
@@ -181,8 +181,8 @@ acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
 
 			if (acpi_gbl_osi_data >= port_info->osi_dependency) {
 				ACPI_DEBUG_PRINT((ACPI_DB_IO,
-						  "Denied AML access to port 0x%p/%X (%s 0x%.4X-0x%.4X)",
-						  ACPI_CAST_PTR(void, address),
+						  "Denied AML access to port 0x%8.8X%8.8X/%X (%s 0x%.4X-0x%.4X)",
+						  ACPI_FORMAT_UINT64(address),
 						  byte_width, port_info->name,
 						  port_info->start,
 						  port_info->end));
diff --git a/drivers/acpi/acpica/nsdump.c b/drivers/acpi/acpica/nsdump.c
index 7418c77fde8c..675e1f17e86f 100644
--- a/drivers/acpi/acpica/nsdump.c
+++ b/drivers/acpi/acpica/nsdump.c
@@ -260,12 +260,11 @@ acpi_ns_dump_one_object(acpi_handle obj_handle,
 		switch (type) {
 		case ACPI_TYPE_PROCESSOR:
 
-			acpi_os_printf("ID %02X Len %02X Addr %p\n",
+			acpi_os_printf("ID %02X Len %02X Addr %8.8X%8.8X\n",
 				       obj_desc->processor.proc_id,
 				       obj_desc->processor.length,
-				       ACPI_CAST_PTR(void,
-						     obj_desc->processor.
-						     address));
+				       ACPI_FORMAT_UINT64(obj_desc->processor.
+							  address));
 			break;
 
 		case ACPI_TYPE_DEVICE:
diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c
index bffdfc7b8322..4a4ca8b38656 100644
--- a/drivers/acpi/acpica/tbutils.c
+++ b/drivers/acpi/acpica/tbutils.c
@@ -285,8 +285,8 @@ acpi_tb_install_table(acpi_physical_address address,
 	table = acpi_os_map_memory(address, sizeof(struct acpi_table_header));
 	if (!table) {
 		ACPI_ERROR((AE_INFO,
-			    "Could not map memory for table [%s] at %p",
-			    signature, ACPI_CAST_PTR(void, address)));
+			    "Could not map memory for table [%s] at %8.8X%8.8X",
+			    signature, ACPI_FORMAT_UINT64(address)));
 		return;
 	}
 
diff --git a/drivers/acpi/acpica/tbxfload.c b/drivers/acpi/acpica/tbxfload.c
index 0ba9e328d5d7..981631717e47 100644
--- a/drivers/acpi/acpica/tbxfload.c
+++ b/drivers/acpi/acpica/tbxfload.c
@@ -183,11 +183,10 @@ static acpi_status acpi_tb_load_namespace(void)
 		 * be useful for debugging ACPI problems on some machines.
 		 */
 		if (acpi_gbl_disable_ssdt_table_load) {
-			ACPI_INFO((AE_INFO, "Ignoring %4.4s at %p",
+			ACPI_INFO((AE_INFO, "Ignoring %4.4s at %8.8X%8.8X",
 				   acpi_gbl_root_table_list.tables[i].signature.
-				   ascii, ACPI_CAST_PTR(void,
-							acpi_gbl_root_table_list.
-							tables[i].address)));
+				   ascii, ACPI_FORMAT_UINT64(acpi_gbl_root_table_list.
+							     tables[i].address)));
 			continue;
 		}
 
diff --git a/drivers/acpi/acpica/utaddress.c b/drivers/acpi/acpica/utaddress.c
index e0a2e2779c2e..3c7770d75773 100644
--- a/drivers/acpi/acpica/utaddress.c
+++ b/drivers/acpi/acpica/utaddress.c
@@ -107,10 +107,10 @@ acpi_ut_add_address_range(acpi_adr_space_type space_id,
 	acpi_gbl_address_range_list[space_id] = range_info;
 
 	ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
-			  "\nAdded [%4.4s] address range: 0x%p-0x%p\n",
+			  "\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
 			  acpi_ut_get_node_name(range_info->region_node),
-			  ACPI_CAST_PTR(void, address),
-			  ACPI_CAST_PTR(void, range_info->end_address)));
+			  ACPI_FORMAT_UINT64(address),
+			  ACPI_FORMAT_UINT64(range_info->end_address)));
 
 	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 	return_ACPI_STATUS(AE_OK);
@@ -160,15 +160,13 @@ acpi_ut_remove_address_range(acpi_adr_space_type space_id,
 			}
 
 			ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
-					  "\nRemoved [%4.4s] address range: 0x%p-0x%p\n",
+					  "\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
 					  acpi_ut_get_node_name(range_info->
 								region_node),
-					  ACPI_CAST_PTR(void,
-							range_info->
-							start_address),
-					  ACPI_CAST_PTR(void,
-							range_info->
-							end_address)));
+					  ACPI_FORMAT_UINT64(range_info->
+							     start_address),
+					  ACPI_FORMAT_UINT64(range_info->
+							     end_address)));
 
 			ACPI_FREE(range_info);
 			return_VOID;
@@ -244,9 +242,9 @@ acpi_ut_check_address_range(acpi_adr_space_type space_id,
 								  region_node);
 
 				ACPI_WARNING((AE_INFO,
-					      "0x%p-0x%p %s conflicts with Region %s %d",
-					      ACPI_CAST_PTR(void, address),
-					      ACPI_CAST_PTR(void, end_address),
+					      "0x%8.8X%8.8X-0x%8.8X%8.8X %s conflicts with Region %s %d",
+					      ACPI_FORMAT_UINT64(address),
+					      ACPI_FORMAT_UINT64(end_address),
 					      acpi_ut_get_region_name(space_id),
 					      pathname, overlap_count));
 				ACPI_FREE(pathname);
-- 
2.3.7

[PATCH 3.12 142/142] ACPICA: Utilities: Cleanup to remove useless ACPI_PRINTF/FORMAT_xxx helpers.

[Jiri Slaby]

From: Lv Zheng <lv.zheng@intel.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 1d0a0b2f6df2bf2643fadc990eb143361eca6ada upstream.

ACPICA commit b60612373a4ef63b64a57c124576d7ddb6d8efb6

For physical addresses, since the address may exceed 32-bit address range
after calculation, we should use 0x%8.8X%8.8X instead of ACPI_PRINTF_UINT
and ACPI_FORMAT_UINT64() instead of
ACPI_FORMAT_NATIVE_UINT()/ACPI_FORMAT_TO_UINT().

This patch also removes above replaced macros as there are no users.

This is a preparation to switch acpi_physical_address to 64-bit on 32-bit
kernel builds.

Link: https://github.com/acpica/acpica/commit/b6061237
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Dirk Behme <dirk.behme@gmail.com>
Signed-off-by: George G. Davis <george_davis@mentor.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/acpi/acpica/acmacros.h | 10 +++-------
 drivers/acpi/acpica/dsopcode.c |  4 ++--
 drivers/acpi/acpica/evregion.c |  2 +-
 drivers/acpi/acpica/exdump.c   |  4 ++--
 drivers/acpi/acpica/exregion.c |  8 +++-----
 drivers/acpi/acpica/nsdump.c   |  5 +++--
 drivers/acpi/acpica/tbprint.c  | 17 +++++++----------
 7 files changed, 21 insertions(+), 29 deletions(-)

diff --git a/drivers/acpi/acpica/acmacros.h b/drivers/acpi/acpica/acmacros.h
index 530a2f8c1252..0a9ee9bbe7ea 100644
--- a/drivers/acpi/acpica/acmacros.h
+++ b/drivers/acpi/acpica/acmacros.h
@@ -63,19 +63,15 @@
 #define ACPI_SET64(ptr, val)            (*ACPI_CAST64 (ptr) = (u64) (val))
 
 /*
- * printf() format helpers
+ * printf() format helper. This macros is a workaround for the difficulties
+ * with emitting 64-bit integers and 64-bit pointers with the same code
+ * for both 32-bit and 64-bit hosts.
  */
 
 /* Split 64-bit integer into two 32-bit values. Use with %8.8X%8.8X */
 
 #define ACPI_FORMAT_UINT64(i)           ACPI_HIDWORD(i), ACPI_LODWORD(i)
 
-#if ACPI_MACHINE_WIDTH == 64
-#define ACPI_FORMAT_NATIVE_UINT(i)      ACPI_FORMAT_UINT64(i)
-#else
-#define ACPI_FORMAT_NATIVE_UINT(i)      0, (i)
-#endif
-
 /*
  * Macros for moving data around to/from buffers that are possibly unaligned.
  * If the hardware supports the transfer of unaligned data, just do the store.
diff --git a/drivers/acpi/acpica/dsopcode.c b/drivers/acpi/acpica/dsopcode.c
index 541b851a8727..fedb65d774ae 100644
--- a/drivers/acpi/acpica/dsopcode.c
+++ b/drivers/acpi/acpica/dsopcode.c
@@ -446,7 +446,7 @@ acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
 
 	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
 			  obj_desc,
-			  ACPI_FORMAT_NATIVE_UINT(obj_desc->region.address),
+			  ACPI_FORMAT_UINT64(obj_desc->region.address),
 			  obj_desc->region.length));
 
 	/* Now the address and length are valid for this opregion */
@@ -544,7 +544,7 @@ acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,
 
 	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
 			  obj_desc,
-			  ACPI_FORMAT_NATIVE_UINT(obj_desc->region.address),
+			  ACPI_FORMAT_UINT64(obj_desc->region.address),
 			  obj_desc->region.length));
 
 	/* Now the address and length are valid for this opregion */
diff --git a/drivers/acpi/acpica/evregion.c b/drivers/acpi/acpica/evregion.c
index 1788b3870713..63ef6d43f046 100644
--- a/drivers/acpi/acpica/evregion.c
+++ b/drivers/acpi/acpica/evregion.c
@@ -277,7 +277,7 @@ acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj,
 	ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
 			  "Handler %p (@%p) Address %8.8X%8.8X [%s]\n",
 			  &region_obj->region.handler->address_space, handler,
-			  ACPI_FORMAT_NATIVE_UINT(address),
+			  ACPI_FORMAT_UINT64(address),
 			  acpi_ut_get_region_name(region_obj->region.
 						  space_id)));
 
diff --git a/drivers/acpi/acpica/exdump.c b/drivers/acpi/acpica/exdump.c
index 4d046faac48c..b64fb68aa5d3 100644
--- a/drivers/acpi/acpica/exdump.c
+++ b/drivers/acpi/acpica/exdump.c
@@ -622,8 +622,8 @@ void acpi_ex_dump_operand(union acpi_operand_object *obj_desc, u32 depth)
 			acpi_os_printf("\n");
 		} else {
 			acpi_os_printf(" base %8.8X%8.8X Length %X\n",
-				       ACPI_FORMAT_NATIVE_UINT(obj_desc->region.
-							       address),
+				       ACPI_FORMAT_UINT64(obj_desc->region.
+							  address),
 				       obj_desc->region.length);
 		}
 		break;
diff --git a/drivers/acpi/acpica/exregion.c b/drivers/acpi/acpica/exregion.c
index 303429bb4d5d..c678c3714d01 100644
--- a/drivers/acpi/acpica/exregion.c
+++ b/drivers/acpi/acpica/exregion.c
@@ -181,7 +181,7 @@ acpi_ex_system_memory_space_handler(u32 function,
 		if (!mem_info->mapped_logical_address) {
 			ACPI_ERROR((AE_INFO,
 				    "Could not map memory at 0x%8.8X%8.8X, size %u",
-				    ACPI_FORMAT_NATIVE_UINT(address),
+				    ACPI_FORMAT_UINT64(address),
 				    (u32) map_length));
 			mem_info->mapped_length = 0;
 			return_ACPI_STATUS(AE_NO_MEMORY);
@@ -202,8 +202,7 @@ acpi_ex_system_memory_space_handler(u32 function,
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 			  "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
-			  bit_width, function,
-			  ACPI_FORMAT_NATIVE_UINT(address)));
+			  bit_width, function, ACPI_FORMAT_UINT64(address)));
 
 	/*
 	 * Perform the memory read or write
@@ -318,8 +317,7 @@ acpi_ex_system_io_space_handler(u32 function,
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 			  "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
-			  bit_width, function,
-			  ACPI_FORMAT_NATIVE_UINT(address)));
+			  bit_width, function, ACPI_FORMAT_UINT64(address)));
 
 	/* Decode the function parameter */
 
diff --git a/drivers/acpi/acpica/nsdump.c b/drivers/acpi/acpica/nsdump.c
index 675e1f17e86f..7f449f0eabfe 100644
--- a/drivers/acpi/acpica/nsdump.c
+++ b/drivers/acpi/acpica/nsdump.c
@@ -335,8 +335,9 @@ acpi_ns_dump_one_object(acpi_handle obj_handle,
 							       space_id));
 			if (obj_desc->region.flags & AOPOBJ_DATA_VALID) {
 				acpi_os_printf(" Addr %8.8X%8.8X Len %.4X\n",
-					       ACPI_FORMAT_NATIVE_UINT
-					       (obj_desc->region.address),
+					       ACPI_FORMAT_UINT64(obj_desc->
+								  region.
+								  address),
 					       obj_desc->region.length);
 			} else {
 				acpi_os_printf
diff --git a/drivers/acpi/acpica/tbprint.c b/drivers/acpi/acpica/tbprint.c
index dc963f823d2c..0c529f23e48a 100644
--- a/drivers/acpi/acpica/tbprint.c
+++ b/drivers/acpi/acpica/tbprint.c
@@ -127,16 +127,12 @@ acpi_tb_print_table_header(acpi_physical_address address,
 {
 	struct acpi_table_header local_header;
 
-	/*
-	 * The reason that the Address is cast to a void pointer is so that we
-	 * can use %p which will work properly on both 32-bit and 64-bit hosts.
-	 */
 	if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) {
 
 		/* FACS only has signature and length fields */
 
-		ACPI_INFO((AE_INFO, "%4.4s %p %05X",
-			   header->signature, ACPI_CAST_PTR(void, address),
+		ACPI_INFO((AE_INFO, "%-4.4s 0x%8.8X%8.8X %05X",
+			   header->signature, ACPI_FORMAT_UINT64(address),
 			   header->length));
 	} else if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_RSDP)) {
 
@@ -147,8 +143,8 @@ acpi_tb_print_table_header(acpi_physical_address address,
 					  header)->oem_id, ACPI_OEM_ID_SIZE);
 		acpi_tb_fix_string(local_header.oem_id, ACPI_OEM_ID_SIZE);
 
-		ACPI_INFO((AE_INFO, "RSDP %p %05X (v%.2d %6.6s)",
-			   ACPI_CAST_PTR(void, address),
+		ACPI_INFO((AE_INFO, "RSDP 0x%8.8X%8.8X %05X (v%.2d %-6.6s)",
+			   ACPI_FORMAT_UINT64(address),
 			   (ACPI_CAST_PTR(struct acpi_table_rsdp, header)->
 			    revision >
 			    0) ? ACPI_CAST_PTR(struct acpi_table_rsdp,
@@ -162,8 +158,9 @@ acpi_tb_print_table_header(acpi_physical_address address,
 		acpi_tb_cleanup_table_header(&local_header, header);
 
 		ACPI_INFO((AE_INFO,
-			   "%4.4s %p %05X (v%.2d %6.6s %8.8s %08X %4.4s %08X)",
-			   local_header.signature, ACPI_CAST_PTR(void, address),
+			   "%-4.4s 0x%8.8X%8.8X"
+			   " %05X (v%.2d %-6.6s %-8.8s %08X %-4.4s %08X)",
+			   local_header.signature, ACPI_FORMAT_UINT64(address),
 			   local_header.length, local_header.revision,
 			   local_header.oem_id, local_header.oem_table_id,
 			   local_header.oem_revision,
-- 
2.3.7

Re: [PATCH 3.12 137/142] mmc: sh_mmcif: Fix timeout value for command request

[Albino Biasutti Neto]

2015-05-16 4:38 GMT-03:00 Jiri Slaby <jslaby@suse.cz>:
> commit bad4371d87d1d1ed1aecd9c9cc21c41ac3f289c8 upstream.
>
> f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")
> changed the timeout value from 1000 jiffies to 1s. In the case where
> HZ is 1000 the values are the same. However, for smaller HZ values the
> timeout is now smaller, 1s instead of 10s in the case of HZ=100.
>
> Since the timeout occurs in spite of a normal data transfer a timeout of
> 10s seems more appropriate. This restores the previous timeout in the
> case where HZ=100 and results in an increase over the previous timeout
> for larger values of HZ.
>
> Fixes: f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")

What is best 1s or 10s ? is 1s. The less time is faster, but HZ=100
not 1000. 10s the longer answer.

True ?


Albino

Re: [PATCH 3.12 137/142] mmc: sh_mmcif: Fix timeout value for command request

[Jiri Slaby]

On 05/16/2015, 01:05 PM, Albino Biasutti Neto wrote:
> 2015-05-16 4:38 GMT-03:00 Jiri Slaby <jslaby@suse.cz>:
>> commit bad4371d87d1d1ed1aecd9c9cc21c41ac3f289c8 upstream.
>>
>> f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")
>> changed the timeout value from 1000 jiffies to 1s. In the case where
>> HZ is 1000 the values are the same. However, for smaller HZ values the
>> timeout is now smaller, 1s instead of 10s in the case of HZ=100.
>>
>> Since the timeout occurs in spite of a normal data transfer a timeout of
>> 10s seems more appropriate. This restores the previous timeout in the
>> case where HZ=100 and results in an increase over the previous timeout
>> for larger values of HZ.
>>
>> Fixes: f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")
> 
> What is best 1s or 10s ? is 1s. The less time is faster, but HZ=100
> not 1000. 10s the longer answer.
> 
> True ?

Sorry, what?

-- 
js
suse labs

Re: [PATCH 3.12 000/142] 3.12.43-stable review

[Guenter Roeck]

On Sat, May 16, 2015 at 09:37:29AM +0200, Jiri Slaby wrote:
> This is the start of the stable review cycle for the 3.12.43 release.
> There are 142 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed May 20 09:36:47 CEST 2015.
> Anything received after that time might be too late.
> 
Hi Jiri,

please consider adding me back to the Cc: list; I might otherwise
miss your review cycle annoucements.

Build results:
	total: 125 pass: 125 fail: 0
Qemu test results:
	total: 27 pass: 27 fail: 0

Details are available at http://server.roeck-us.net:8010/builders.

Thanks,
Guenter

Re: [PATCH 3.12 000/142] 3.12.43-stable review

[Jiri Slaby]

On 05/16/2015, 06:55 PM, Guenter Roeck wrote:
> On Sat, May 16, 2015 at 09:37:29AM +0200, Jiri Slaby wrote:
>> This is the start of the stable review cycle for the 3.12.43 release.
>> There are 142 patches in this series, all will be posted as a response
>> to this one.  If anyone has any issues with these being applied, please
>> let me know.
>>
>> Responses should be made by Wed May 20 09:36:47 CEST 2015.
>> Anything received after that time might be too late.
>>
> Hi Jiri,
> 
> please consider adding me back to the Cc: list; I might otherwise
> miss your review cycle annoucements.

Hi, you are on the list, but I am sitting behind a weird ISP ATM, so
maybe the e-mail was dropped to your spam folder, if received at all.

> Build results:
> 	total: 125 pass: 125 fail: 0
> Qemu test results:
> 	total: 27 pass: 27 fail: 0
> 
> Details are available at http://server.roeck-us.net:8010/builders.

Even if you missed the announcement, I am monitoring this URL constantly :).

Thanks for the results.

-- 
js
suse labs

Re: [PATCH 3.12 137/142] mmc: sh_mmcif: Fix timeout value for command request

[Simon Horman]

On Sat, May 16, 2015 at 01:23:20PM +0200, Jiri Slaby wrote:
> On 05/16/2015, 01:05 PM, Albino Biasutti Neto wrote:
> > 2015-05-16 4:38 GMT-03:00 Jiri Slaby <jslaby@suse.cz>:
> >> commit bad4371d87d1d1ed1aecd9c9cc21c41ac3f289c8 upstream.
> >>
> >> f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")
> >> changed the timeout value from 1000 jiffies to 1s. In the case where
> >> HZ is 1000 the values are the same. However, for smaller HZ values the
> >> timeout is now smaller, 1s instead of 10s in the case of HZ=100.
> >>
> >> Since the timeout occurs in spite of a normal data transfer a timeout of
> >> 10s seems more appropriate. This restores the previous timeout in the
> >> case where HZ=100 and results in an increase over the previous timeout
> >> for larger values of HZ.
> >>
> >> Fixes: f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")
> > 
> > What is best 1s or 10s ? is 1s. The less time is faster, but HZ=100
> > not 1000. 10s the longer answer.
> > 
> > True ?
> 
> Sorry, what?

My understanding is that there is a desire to have a timeout of 10s
as 1s has turned out to be too short in practice.

Prior to f9fd54f22e the timeout was 10s for HZ=100, and it is my
understanding that on SH mobile HZ=100 is the normal case.

Re: [PATCH 3.12 071/142] drm/i915: cope with large i2c transfers

[Luis Henriques]

On Sat, May 16, 2015 at 09:37:11AM +0200, Jiri Slaby wrote:
> From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> 
> 3.12-stable review patch.  If anyone has any objections, please let me know.
> 

Ben Hutchings (on CC) just asked about this patch being included on
the 3.16 kernel [1].  Is this patch really useful for kernels < 3.17?
Should it be reverted from all the other stable kernels (3.10, 3.14
and 3.16), or do you think it's harmless?

[1] http://thread.gmane.org/gmane.linux.kernel.stable/136673

Cheers,
--
Luís

> ===============
> 
> commit 9535c4757b881e06fae72a857485ad57c422b8d2 upstream.
> 
> The hardware, according to the specs, is limited to 256 byte transfers,
> and current driver has no protections in case users attempt to do larger
> transfers. The code will just stomp over status register and mayhem
> ensues.
> 
> Let's split larger transfers into digestable chunks. Doing this allows
> Atmel MXT driver on Pixel 1 function properly (it hasn't since commit
> 9d8dc3e529a19e427fd379118acd132520935c5d "Input: atmel_mxt_ts -
> implement T44 message handling" which tries to consume multiple
> touchscreen/touchpad reports in a single transaction).
> 
> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
> ---
>  drivers/gpu/drm/i915/i915_reg.h  |  1 +
>  drivers/gpu/drm/i915/intel_i2c.c | 66 ++++++++++++++++++++++++++++++++++------
>  2 files changed, 57 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 9d344da55056..4e0053e64f14 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -1105,6 +1105,7 @@
>  #define   GMBUS_CYCLE_INDEX	(2<<25)
>  #define   GMBUS_CYCLE_STOP	(4<<25)
>  #define   GMBUS_BYTE_COUNT_SHIFT 16
> +#define   GMBUS_BYTE_COUNT_MAX   256U
>  #define   GMBUS_SLAVE_INDEX_SHIFT 8
>  #define   GMBUS_SLAVE_ADDR_SHIFT 1
>  #define   GMBUS_SLAVE_READ	(1<<0)
> diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
> index d1c1e0f7f262..36b720475dc0 100644
> --- a/drivers/gpu/drm/i915/intel_i2c.c
> +++ b/drivers/gpu/drm/i915/intel_i2c.c
> @@ -276,18 +276,17 @@ gmbus_wait_idle(struct drm_i915_private *dev_priv)
>  }
>  
>  static int
> -gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
> -		u32 gmbus1_index)
> +gmbus_xfer_read_chunk(struct drm_i915_private *dev_priv,
> +		      unsigned short addr, u8 *buf, unsigned int len,
> +		      u32 gmbus1_index)
>  {
>  	int reg_offset = dev_priv->gpio_mmio_base;
> -	u16 len = msg->len;
> -	u8 *buf = msg->buf;
>  
>  	I915_WRITE(GMBUS1 + reg_offset,
>  		   gmbus1_index |
>  		   GMBUS_CYCLE_WAIT |
>  		   (len << GMBUS_BYTE_COUNT_SHIFT) |
> -		   (msg->addr << GMBUS_SLAVE_ADDR_SHIFT) |
> +		   (addr << GMBUS_SLAVE_ADDR_SHIFT) |
>  		   GMBUS_SLAVE_READ | GMBUS_SW_RDY);
>  	while (len) {
>  		int ret;
> @@ -309,11 +308,35 @@ gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
>  }
>  
>  static int
> -gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
> +gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
> +		u32 gmbus1_index)
>  {
> -	int reg_offset = dev_priv->gpio_mmio_base;
> -	u16 len = msg->len;
>  	u8 *buf = msg->buf;
> +	unsigned int rx_size = msg->len;
> +	unsigned int len;
> +	int ret;
> +
> +	do {
> +		len = min(rx_size, GMBUS_BYTE_COUNT_MAX);
> +
> +		ret = gmbus_xfer_read_chunk(dev_priv, msg->addr,
> +					    buf, len, gmbus1_index);
> +		if (ret)
> +			return ret;
> +
> +		rx_size -= len;
> +		buf += len;
> +	} while (rx_size != 0);
> +
> +	return 0;
> +}
> +
> +static int
> +gmbus_xfer_write_chunk(struct drm_i915_private *dev_priv,
> +		       unsigned short addr, u8 *buf, unsigned int len)
> +{
> +	int reg_offset = dev_priv->gpio_mmio_base;
> +	unsigned int chunk_size = len;
>  	u32 val, loop;
>  
>  	val = loop = 0;
> @@ -325,8 +348,8 @@ gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
>  	I915_WRITE(GMBUS3 + reg_offset, val);
>  	I915_WRITE(GMBUS1 + reg_offset,
>  		   GMBUS_CYCLE_WAIT |
> -		   (msg->len << GMBUS_BYTE_COUNT_SHIFT) |
> -		   (msg->addr << GMBUS_SLAVE_ADDR_SHIFT) |
> +		   (chunk_size << GMBUS_BYTE_COUNT_SHIFT) |
> +		   (addr << GMBUS_SLAVE_ADDR_SHIFT) |
>  		   GMBUS_SLAVE_WRITE | GMBUS_SW_RDY);
>  	while (len) {
>  		int ret;
> @@ -343,6 +366,29 @@ gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
>  		if (ret)
>  			return ret;
>  	}
> +
> +	return 0;
> +}
> +
> +static int
> +gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
> +{
> +	u8 *buf = msg->buf;
> +	unsigned int tx_size = msg->len;
> +	unsigned int len;
> +	int ret;
> +
> +	do {
> +		len = min(tx_size, GMBUS_BYTE_COUNT_MAX);
> +
> +		ret = gmbus_xfer_write_chunk(dev_priv, msg->addr, buf, len);
> +		if (ret)
> +			return ret;
> +
> +		buf += len;
> +		tx_size -= len;
> +	} while (tx_size != 0);
> +
>  	return 0;
>  }
>  
> -- 
> 2.3.7
> 
> --
> To unsubscribe from this list: send the line "unsubscribe stable" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 3.12 071/142] drm/i915: cope with large i2c transfers

[Jani Nikula]

On Mon, 18 May 2015, Luis Henriques <luis.henriques@canonical.com> wrote:
> On Sat, May 16, 2015 at 09:37:11AM +0200, Jiri Slaby wrote:
>> From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
>> 
>> 3.12-stable review patch.  If anyone has any objections, please let me know.
>> 
>
> Ben Hutchings (on CC) just asked about this patch being included on
> the 3.16 kernel [1].  Is this patch really useful for kernels < 3.17?
> Should it be reverted from all the other stable kernels (3.10, 3.14
> and 3.16), or do you think it's harmless?

The bug fixed by Dmitry's patch has been there since the introduction of
the gmbus code in v2.6.37 by

commit f899fc64cda8569d0529452aafc0da31c042df2e
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Tue Jul 20 15:44:45 2010 -0700

    drm/i915: use GMBUS to manage i2c links

It's just that nobody noticed before

commit 9d8dc3e529a19e427fd379118acd132520935c5d
Author: Nick Dyer <nick.dyer@itdev.co.uk>
Date:   Wed Jul 23 12:49:04 2014 -0700

    Input: atmel_mxt_ts - implement T44 message handling


BR,
Jani.


>
> [1] http://thread.gmane.org/gmane.linux.kernel.stable/136673
>
> Cheers,
> --
> Luís
>
>> ===============
>> 
>> commit 9535c4757b881e06fae72a857485ad57c422b8d2 upstream.
>> 
>> The hardware, according to the specs, is limited to 256 byte transfers,
>> and current driver has no protections in case users attempt to do larger
>> transfers. The code will just stomp over status register and mayhem
>> ensues.
>> 
>> Let's split larger transfers into digestable chunks. Doing this allows
>> Atmel MXT driver on Pixel 1 function properly (it hasn't since commit
>> 9d8dc3e529a19e427fd379118acd132520935c5d "Input: atmel_mxt_ts -
>> implement T44 message handling" which tries to consume multiple
>> touchscreen/touchpad reports in a single transaction).
>> 
>> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
>> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
>> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
>> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
>> ---
>>  drivers/gpu/drm/i915/i915_reg.h  |  1 +
>>  drivers/gpu/drm/i915/intel_i2c.c | 66 ++++++++++++++++++++++++++++++++++------
>>  2 files changed, 57 insertions(+), 10 deletions(-)
>> 
>> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
>> index 9d344da55056..4e0053e64f14 100644
>> --- a/drivers/gpu/drm/i915/i915_reg.h
>> +++ b/drivers/gpu/drm/i915/i915_reg.h
>> @@ -1105,6 +1105,7 @@
>>  #define   GMBUS_CYCLE_INDEX	(2<<25)
>>  #define   GMBUS_CYCLE_STOP	(4<<25)
>>  #define   GMBUS_BYTE_COUNT_SHIFT 16
>> +#define   GMBUS_BYTE_COUNT_MAX   256U
>>  #define   GMBUS_SLAVE_INDEX_SHIFT 8
>>  #define   GMBUS_SLAVE_ADDR_SHIFT 1
>>  #define   GMBUS_SLAVE_READ	(1<<0)
>> diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
>> index d1c1e0f7f262..36b720475dc0 100644
>> --- a/drivers/gpu/drm/i915/intel_i2c.c
>> +++ b/drivers/gpu/drm/i915/intel_i2c.c
>> @@ -276,18 +276,17 @@ gmbus_wait_idle(struct drm_i915_private *dev_priv)
>>  }
>>  
>>  static int
>> -gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
>> -		u32 gmbus1_index)
>> +gmbus_xfer_read_chunk(struct drm_i915_private *dev_priv,
>> +		      unsigned short addr, u8 *buf, unsigned int len,
>> +		      u32 gmbus1_index)
>>  {
>>  	int reg_offset = dev_priv->gpio_mmio_base;
>> -	u16 len = msg->len;
>> -	u8 *buf = msg->buf;
>>  
>>  	I915_WRITE(GMBUS1 + reg_offset,
>>  		   gmbus1_index |
>>  		   GMBUS_CYCLE_WAIT |
>>  		   (len << GMBUS_BYTE_COUNT_SHIFT) |
>> -		   (msg->addr << GMBUS_SLAVE_ADDR_SHIFT) |
>> +		   (addr << GMBUS_SLAVE_ADDR_SHIFT) |
>>  		   GMBUS_SLAVE_READ | GMBUS_SW_RDY);
>>  	while (len) {
>>  		int ret;
>> @@ -309,11 +308,35 @@ gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
>>  }
>>  
>>  static int
>> -gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
>> +gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
>> +		u32 gmbus1_index)
>>  {
>> -	int reg_offset = dev_priv->gpio_mmio_base;
>> -	u16 len = msg->len;
>>  	u8 *buf = msg->buf;
>> +	unsigned int rx_size = msg->len;
>> +	unsigned int len;
>> +	int ret;
>> +
>> +	do {
>> +		len = min(rx_size, GMBUS_BYTE_COUNT_MAX);
>> +
>> +		ret = gmbus_xfer_read_chunk(dev_priv, msg->addr,
>> +					    buf, len, gmbus1_index);
>> +		if (ret)
>> +			return ret;
>> +
>> +		rx_size -= len;
>> +		buf += len;
>> +	} while (rx_size != 0);
>> +
>> +	return 0;
>> +}
>> +
>> +static int
>> +gmbus_xfer_write_chunk(struct drm_i915_private *dev_priv,
>> +		       unsigned short addr, u8 *buf, unsigned int len)
>> +{
>> +	int reg_offset = dev_priv->gpio_mmio_base;
>> +	unsigned int chunk_size = len;
>>  	u32 val, loop;
>>  
>>  	val = loop = 0;
>> @@ -325,8 +348,8 @@ gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
>>  	I915_WRITE(GMBUS3 + reg_offset, val);
>>  	I915_WRITE(GMBUS1 + reg_offset,
>>  		   GMBUS_CYCLE_WAIT |
>> -		   (msg->len << GMBUS_BYTE_COUNT_SHIFT) |
>> -		   (msg->addr << GMBUS_SLAVE_ADDR_SHIFT) |
>> +		   (chunk_size << GMBUS_BYTE_COUNT_SHIFT) |
>> +		   (addr << GMBUS_SLAVE_ADDR_SHIFT) |
>>  		   GMBUS_SLAVE_WRITE | GMBUS_SW_RDY);
>>  	while (len) {
>>  		int ret;
>> @@ -343,6 +366,29 @@ gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
>>  		if (ret)
>>  			return ret;
>>  	}
>> +
>> +	return 0;
>> +}
>> +
>> +static int
>> +gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
>> +{
>> +	u8 *buf = msg->buf;
>> +	unsigned int tx_size = msg->len;
>> +	unsigned int len;
>> +	int ret;
>> +
>> +	do {
>> +		len = min(tx_size, GMBUS_BYTE_COUNT_MAX);
>> +
>> +		ret = gmbus_xfer_write_chunk(dev_priv, msg->addr, buf, len);
>> +		if (ret)
>> +			return ret;
>> +
>> +		buf += len;
>> +		tx_size -= len;
>> +	} while (tx_size != 0);
>> +
>>  	return 0;
>>  }
>>  
>> -- 
>> 2.3.7
>> 
>> --
>> To unsubscribe from this list: send the line "unsubscribe stable" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html

-- 
Jani Nikula, Intel Open Source Technology Center

Re: [PATCH 3.12 071/142] drm/i915: cope with large i2c transfers

[Jani Nikula]

On Mon, 18 May 2015, Jani Nikula <jani.nikula@intel.com> wrote:
> On Mon, 18 May 2015, Luis Henriques <luis.henriques@canonical.com> wrote:
>> On Sat, May 16, 2015 at 09:37:11AM +0200, Jiri Slaby wrote:
>>> From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
>>> 
>>> 3.12-stable review patch.  If anyone has any objections, please let me know.
>>> 
>>
>> Ben Hutchings (on CC) just asked about this patch being included on
>> the 3.16 kernel [1].  Is this patch really useful for kernels < 3.17?
>> Should it be reverted from all the other stable kernels (3.10, 3.14
>> and 3.16), or do you think it's harmless?
>
> The bug fixed by Dmitry's patch has been there since the introduction of
> the gmbus code in v2.6.37 by
>
> commit f899fc64cda8569d0529452aafc0da31c042df2e
> Author: Chris Wilson <chris@chris-wilson.co.uk>
> Date:   Tue Jul 20 15:44:45 2010 -0700
>
>     drm/i915: use GMBUS to manage i2c links
>
> It's just that nobody noticed before
>
> commit 9d8dc3e529a19e427fd379118acd132520935c5d
> Author: Nick Dyer <nick.dyer@itdev.co.uk>
> Date:   Wed Jul 23 12:49:04 2014 -0700
>
>     Input: atmel_mxt_ts - implement T44 message handling

So to be clear, I think the fix is worth backporting anywhere you can
easily backport. I did not check, but I think it may be possible to
trigger this from userspace with the i2c interface.


>
>
> BR,
> Jani.
>
>
>>
>> [1] http://thread.gmane.org/gmane.linux.kernel.stable/136673
>>
>> Cheers,
>> --
>> Luís
>>
>>> ===============
>>> 
>>> commit 9535c4757b881e06fae72a857485ad57c422b8d2 upstream.
>>> 
>>> The hardware, according to the specs, is limited to 256 byte transfers,
>>> and current driver has no protections in case users attempt to do larger
>>> transfers. The code will just stomp over status register and mayhem
>>> ensues.
>>> 
>>> Let's split larger transfers into digestable chunks. Doing this allows
>>> Atmel MXT driver on Pixel 1 function properly (it hasn't since commit
>>> 9d8dc3e529a19e427fd379118acd132520935c5d "Input: atmel_mxt_ts -
>>> implement T44 message handling" which tries to consume multiple
>>> touchscreen/touchpad reports in a single transaction).
>>> 
>>> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
>>> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
>>> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
>>> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
>>> ---
>>>  drivers/gpu/drm/i915/i915_reg.h  |  1 +
>>>  drivers/gpu/drm/i915/intel_i2c.c | 66 ++++++++++++++++++++++++++++++++++------
>>>  2 files changed, 57 insertions(+), 10 deletions(-)
>>> 
>>> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
>>> index 9d344da55056..4e0053e64f14 100644
>>> --- a/drivers/gpu/drm/i915/i915_reg.h
>>> +++ b/drivers/gpu/drm/i915/i915_reg.h
>>> @@ -1105,6 +1105,7 @@
>>>  #define   GMBUS_CYCLE_INDEX	(2<<25)
>>>  #define   GMBUS_CYCLE_STOP	(4<<25)
>>>  #define   GMBUS_BYTE_COUNT_SHIFT 16
>>> +#define   GMBUS_BYTE_COUNT_MAX   256U
>>>  #define   GMBUS_SLAVE_INDEX_SHIFT 8
>>>  #define   GMBUS_SLAVE_ADDR_SHIFT 1
>>>  #define   GMBUS_SLAVE_READ	(1<<0)
>>> diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
>>> index d1c1e0f7f262..36b720475dc0 100644
>>> --- a/drivers/gpu/drm/i915/intel_i2c.c
>>> +++ b/drivers/gpu/drm/i915/intel_i2c.c
>>> @@ -276,18 +276,17 @@ gmbus_wait_idle(struct drm_i915_private *dev_priv)
>>>  }
>>>  
>>>  static int
>>> -gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
>>> -		u32 gmbus1_index)
>>> +gmbus_xfer_read_chunk(struct drm_i915_private *dev_priv,
>>> +		      unsigned short addr, u8 *buf, unsigned int len,
>>> +		      u32 gmbus1_index)
>>>  {
>>>  	int reg_offset = dev_priv->gpio_mmio_base;
>>> -	u16 len = msg->len;
>>> -	u8 *buf = msg->buf;
>>>  
>>>  	I915_WRITE(GMBUS1 + reg_offset,
>>>  		   gmbus1_index |
>>>  		   GMBUS_CYCLE_WAIT |
>>>  		   (len << GMBUS_BYTE_COUNT_SHIFT) |
>>> -		   (msg->addr << GMBUS_SLAVE_ADDR_SHIFT) |
>>> +		   (addr << GMBUS_SLAVE_ADDR_SHIFT) |
>>>  		   GMBUS_SLAVE_READ | GMBUS_SW_RDY);
>>>  	while (len) {
>>>  		int ret;
>>> @@ -309,11 +308,35 @@ gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
>>>  }
>>>  
>>>  static int
>>> -gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
>>> +gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
>>> +		u32 gmbus1_index)
>>>  {
>>> -	int reg_offset = dev_priv->gpio_mmio_base;
>>> -	u16 len = msg->len;
>>>  	u8 *buf = msg->buf;
>>> +	unsigned int rx_size = msg->len;
>>> +	unsigned int len;
>>> +	int ret;
>>> +
>>> +	do {
>>> +		len = min(rx_size, GMBUS_BYTE_COUNT_MAX);
>>> +
>>> +		ret = gmbus_xfer_read_chunk(dev_priv, msg->addr,
>>> +					    buf, len, gmbus1_index);
>>> +		if (ret)
>>> +			return ret;
>>> +
>>> +		rx_size -= len;
>>> +		buf += len;
>>> +	} while (rx_size != 0);
>>> +
>>> +	return 0;
>>> +}
>>> +
>>> +static int
>>> +gmbus_xfer_write_chunk(struct drm_i915_private *dev_priv,
>>> +		       unsigned short addr, u8 *buf, unsigned int len)
>>> +{
>>> +	int reg_offset = dev_priv->gpio_mmio_base;
>>> +	unsigned int chunk_size = len;
>>>  	u32 val, loop;
>>>  
>>>  	val = loop = 0;
>>> @@ -325,8 +348,8 @@ gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
>>>  	I915_WRITE(GMBUS3 + reg_offset, val);
>>>  	I915_WRITE(GMBUS1 + reg_offset,
>>>  		   GMBUS_CYCLE_WAIT |
>>> -		   (msg->len << GMBUS_BYTE_COUNT_SHIFT) |
>>> -		   (msg->addr << GMBUS_SLAVE_ADDR_SHIFT) |
>>> +		   (chunk_size << GMBUS_BYTE_COUNT_SHIFT) |
>>> +		   (addr << GMBUS_SLAVE_ADDR_SHIFT) |
>>>  		   GMBUS_SLAVE_WRITE | GMBUS_SW_RDY);
>>>  	while (len) {
>>>  		int ret;
>>> @@ -343,6 +366,29 @@ gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
>>>  		if (ret)
>>>  			return ret;
>>>  	}
>>> +
>>> +	return 0;
>>> +}
>>> +
>>> +static int
>>> +gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
>>> +{
>>> +	u8 *buf = msg->buf;
>>> +	unsigned int tx_size = msg->len;
>>> +	unsigned int len;
>>> +	int ret;
>>> +
>>> +	do {
>>> +		len = min(tx_size, GMBUS_BYTE_COUNT_MAX);
>>> +
>>> +		ret = gmbus_xfer_write_chunk(dev_priv, msg->addr, buf, len);
>>> +		if (ret)
>>> +			return ret;
>>> +
>>> +		buf += len;
>>> +		tx_size -= len;
>>> +	} while (tx_size != 0);
>>> +
>>>  	return 0;
>>>  }
>>>  
>>> -- 
>>> 2.3.7
>>> 
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe stable" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
> -- 
> Jani Nikula, Intel Open Source Technology Center

-- 
Jani Nikula, Intel Open Source Technology Center

Re: [PATCH 3.12 071/142] drm/i915: cope with large i2c transfers

[Luis Henriques]

On Mon, May 18, 2015 at 02:00:04PM +0300, Jani Nikula wrote:
> On Mon, 18 May 2015, Jani Nikula <jani.nikula@intel.com> wrote:
> > On Mon, 18 May 2015, Luis Henriques <luis.henriques@canonical.com> wrote:
> >> On Sat, May 16, 2015 at 09:37:11AM +0200, Jiri Slaby wrote:
> >>> From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> >>> 
> >>> 3.12-stable review patch.  If anyone has any objections, please let me know.
> >>> 
> >>
> >> Ben Hutchings (on CC) just asked about this patch being included on
> >> the 3.16 kernel [1].  Is this patch really useful for kernels < 3.17?
> >> Should it be reverted from all the other stable kernels (3.10, 3.14
> >> and 3.16), or do you think it's harmless?
> >
> > The bug fixed by Dmitry's patch has been there since the introduction of
> > the gmbus code in v2.6.37 by
> >
> > commit f899fc64cda8569d0529452aafc0da31c042df2e
> > Author: Chris Wilson <chris@chris-wilson.co.uk>
> > Date:   Tue Jul 20 15:44:45 2010 -0700
> >
> >     drm/i915: use GMBUS to manage i2c links
> >
> > It's just that nobody noticed before
> >
> > commit 9d8dc3e529a19e427fd379118acd132520935c5d
> > Author: Nick Dyer <nick.dyer@itdev.co.uk>
> > Date:   Wed Jul 23 12:49:04 2014 -0700
> >
> >     Input: atmel_mxt_ts - implement T44 message handling
> 
> So to be clear, I think the fix is worth backporting anywhere you can
> easily backport. I did not check, but I think it may be possible to
> trigger this from userspace with the i2c interface.
> 
> 

Great, so it's definitely worth keeping it in all these stable trees.
Thanks a lot for the clarification, Jani.

Cheers,
--
Luís

> >
> >
> > BR,
> > Jani.
> >
> >
> >>
> >> [1] http://thread.gmane.org/gmane.linux.kernel.stable/136673
> >>
> >> Cheers,
> >> --
> >> Luís
> >>
> >>> ===============
> >>> 
> >>> commit 9535c4757b881e06fae72a857485ad57c422b8d2 upstream.
> >>> 
> >>> The hardware, according to the specs, is limited to 256 byte transfers,
> >>> and current driver has no protections in case users attempt to do larger
> >>> transfers. The code will just stomp over status register and mayhem
> >>> ensues.
> >>> 
> >>> Let's split larger transfers into digestable chunks. Doing this allows
> >>> Atmel MXT driver on Pixel 1 function properly (it hasn't since commit
> >>> 9d8dc3e529a19e427fd379118acd132520935c5d "Input: atmel_mxt_ts -
> >>> implement T44 message handling" which tries to consume multiple
> >>> touchscreen/touchpad reports in a single transaction).
> >>> 
> >>> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
> >>> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> >>> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
> >>> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
> >>> ---
> >>>  drivers/gpu/drm/i915/i915_reg.h  |  1 +
> >>>  drivers/gpu/drm/i915/intel_i2c.c | 66 ++++++++++++++++++++++++++++++++++------
> >>>  2 files changed, 57 insertions(+), 10 deletions(-)
> >>> 
> >>> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> >>> index 9d344da55056..4e0053e64f14 100644
> >>> --- a/drivers/gpu/drm/i915/i915_reg.h
> >>> +++ b/drivers/gpu/drm/i915/i915_reg.h
> >>> @@ -1105,6 +1105,7 @@
> >>>  #define   GMBUS_CYCLE_INDEX	(2<<25)
> >>>  #define   GMBUS_CYCLE_STOP	(4<<25)
> >>>  #define   GMBUS_BYTE_COUNT_SHIFT 16
> >>> +#define   GMBUS_BYTE_COUNT_MAX   256U
> >>>  #define   GMBUS_SLAVE_INDEX_SHIFT 8
> >>>  #define   GMBUS_SLAVE_ADDR_SHIFT 1
> >>>  #define   GMBUS_SLAVE_READ	(1<<0)
> >>> diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
> >>> index d1c1e0f7f262..36b720475dc0 100644
> >>> --- a/drivers/gpu/drm/i915/intel_i2c.c
> >>> +++ b/drivers/gpu/drm/i915/intel_i2c.c
> >>> @@ -276,18 +276,17 @@ gmbus_wait_idle(struct drm_i915_private *dev_priv)
> >>>  }
> >>>  
> >>>  static int
> >>> -gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
> >>> -		u32 gmbus1_index)
> >>> +gmbus_xfer_read_chunk(struct drm_i915_private *dev_priv,
> >>> +		      unsigned short addr, u8 *buf, unsigned int len,
> >>> +		      u32 gmbus1_index)
> >>>  {
> >>>  	int reg_offset = dev_priv->gpio_mmio_base;
> >>> -	u16 len = msg->len;
> >>> -	u8 *buf = msg->buf;
> >>>  
> >>>  	I915_WRITE(GMBUS1 + reg_offset,
> >>>  		   gmbus1_index |
> >>>  		   GMBUS_CYCLE_WAIT |
> >>>  		   (len << GMBUS_BYTE_COUNT_SHIFT) |
> >>> -		   (msg->addr << GMBUS_SLAVE_ADDR_SHIFT) |
> >>> +		   (addr << GMBUS_SLAVE_ADDR_SHIFT) |
> >>>  		   GMBUS_SLAVE_READ | GMBUS_SW_RDY);
> >>>  	while (len) {
> >>>  		int ret;
> >>> @@ -309,11 +308,35 @@ gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
> >>>  }
> >>>  
> >>>  static int
> >>> -gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
> >>> +gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
> >>> +		u32 gmbus1_index)
> >>>  {
> >>> -	int reg_offset = dev_priv->gpio_mmio_base;
> >>> -	u16 len = msg->len;
> >>>  	u8 *buf = msg->buf;
> >>> +	unsigned int rx_size = msg->len;
> >>> +	unsigned int len;
> >>> +	int ret;
> >>> +
> >>> +	do {
> >>> +		len = min(rx_size, GMBUS_BYTE_COUNT_MAX);
> >>> +
> >>> +		ret = gmbus_xfer_read_chunk(dev_priv, msg->addr,
> >>> +					    buf, len, gmbus1_index);
> >>> +		if (ret)
> >>> +			return ret;
> >>> +
> >>> +		rx_size -= len;
> >>> +		buf += len;
> >>> +	} while (rx_size != 0);
> >>> +
> >>> +	return 0;
> >>> +}
> >>> +
> >>> +static int
> >>> +gmbus_xfer_write_chunk(struct drm_i915_private *dev_priv,
> >>> +		       unsigned short addr, u8 *buf, unsigned int len)
> >>> +{
> >>> +	int reg_offset = dev_priv->gpio_mmio_base;
> >>> +	unsigned int chunk_size = len;
> >>>  	u32 val, loop;
> >>>  
> >>>  	val = loop = 0;
> >>> @@ -325,8 +348,8 @@ gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
> >>>  	I915_WRITE(GMBUS3 + reg_offset, val);
> >>>  	I915_WRITE(GMBUS1 + reg_offset,
> >>>  		   GMBUS_CYCLE_WAIT |
> >>> -		   (msg->len << GMBUS_BYTE_COUNT_SHIFT) |
> >>> -		   (msg->addr << GMBUS_SLAVE_ADDR_SHIFT) |
> >>> +		   (chunk_size << GMBUS_BYTE_COUNT_SHIFT) |
> >>> +		   (addr << GMBUS_SLAVE_ADDR_SHIFT) |
> >>>  		   GMBUS_SLAVE_WRITE | GMBUS_SW_RDY);
> >>>  	while (len) {
> >>>  		int ret;
> >>> @@ -343,6 +366,29 @@ gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
> >>>  		if (ret)
> >>>  			return ret;
> >>>  	}
> >>> +
> >>> +	return 0;
> >>> +}
> >>> +
> >>> +static int
> >>> +gmbus_xfer_write(struct drm_i915_private *dev_priv, struct i2c_msg *msg)
> >>> +{
> >>> +	u8 *buf = msg->buf;
> >>> +	unsigned int tx_size = msg->len;
> >>> +	unsigned int len;
> >>> +	int ret;
> >>> +
> >>> +	do {
> >>> +		len = min(tx_size, GMBUS_BYTE_COUNT_MAX);
> >>> +
> >>> +		ret = gmbus_xfer_write_chunk(dev_priv, msg->addr, buf, len);
> >>> +		if (ret)
> >>> +			return ret;
> >>> +
> >>> +		buf += len;
> >>> +		tx_size -= len;
> >>> +	} while (tx_size != 0);
> >>> +
> >>>  	return 0;
> >>>  }
> >>>  
> >>> -- 
> >>> 2.3.7
> >>> 
> >>> --
> >>> To unsubscribe from this list: send the line "unsubscribe stable" in
> >>> the body of a message to majordomo@vger.kernel.org
> >>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >
> > -- 
> > Jani Nikula, Intel Open Source Technology Center
> 
> -- 
> Jani Nikula, Intel Open Source Technology Center

Re: [PATCH 3.12 137/142] mmc: sh_mmcif: Fix timeout value for command request

[Albino Biasutti Neto]

2015-05-17 21:37 GMT-03:00 Simon Horman <horms@verge.net.au>:
>> > True ?
>>
>> Sorry, what?
>
> My understanding is that there is a desire to have a timeout of 10s
> as 1s has turned out to be too short in practice.
>
> Prior to f9fd54f22e the timeout was 10s for HZ=100, and it is my
> understanding that on SH mobile HZ=100 is the normal case.

Understand.


Albino