[PATCH 4.19 00/46] 4.19.120-rc1 review

[PATCH 4.19 00/46] 4.19.120-rc1 review

[Greg Kroah-Hartman]

This is the start of the stable review cycle for the 4.19.120 release.
There are 46 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 Sun, 03 May 2020 13:12:02 +0000.
Anything received after that time might be too late.

The whole patch series can be found in one patch at:
	https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.120-rc1.gz
or in the git tree and branch at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
and the diffstat can be found below.

thanks,

greg k-h

-------------
Pseudo-Shortlog of commits:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Linux 4.19.120-rc1

Ritesh Harjani <riteshh@linux.ibm.com>
    ext4: check for non-zero journal inum in ext4_calculate_overhead

Yuval Basson <ybason@marvell.com>
    qed: Fix use after free in qed_chain_free

Luke Nelson <lukenels@cs.washington.edu>
    bpf, x86_32: Fix clobbering of dst for BPF_JSET

Sascha Hauer <s.hauer@pengutronix.de>
    hwmon: (jc42) Fix name to have no illegal characters

Theodore Ts'o <tytso@mit.edu>
    ext4: convert BUG_ON's to WARN_ON's in mballoc.c

Theodore Ts'o <tytso@mit.edu>
    ext4: increase wait time needed before reuse of deleted inode numbers

yangerkun <yangerkun@huawei.com>
    ext4: use matching invalidatepage in ext4_writepage

Fangrui Song <maskray@google.com>
    arm64: Delete the space separator in __emit_inst

Hui Wang <hui.wang@canonical.com>
    ALSA: hda: call runtime_allow() for all hda controllers

Juergen Gross <jgross@suse.com>
    xen/xenbus: ensure xenbus_map_ring_valloc() returns proper grant status

Josh Poimboeuf <jpoimboe@redhat.com>
    objtool: Support Clang non-section symbols in ORC dump

Josh Poimboeuf <jpoimboe@redhat.com>
    objtool: Fix CONFIG_UBSAN_TRAP unreachable warnings

Bodo Stroesser <bstroesser@ts.fujitsu.com>
    scsi: target: tcmu: reset_ring should reset TCMU_DEV_BIT_BROKEN

Bodo Stroesser <bstroesser@ts.fujitsu.com>
    scsi: target: fix PR IN / READ FULL STATUS for FC

Roy Spliet <nouveau@spliet.org>
    ALSA: hda: Explicitly permit using autosuspend if runtime PM is supported

Takashi Iwai <tiwai@suse.de>
    ALSA: hda: Keep the controller initialization even if no codecs found

Darrick J. Wong <darrick.wong@oracle.com>
    xfs: fix partially uninitialized structure in xfs_reflink_remap_extent

Olaf Hering <olaf@aepfle.de>
    x86: hyperv: report value of misc_features

Martin Fuzzey <martin.fuzzey@flowbird.group>
    net: fec: set GPR bit on suspend by DT configuration.

Luke Nelson <lukenels@cs.washington.edu>
    bpf, x86: Fix encoding for lower 8-bit registers in BPF_STX BPF_B

Eric Biggers <ebiggers@google.com>
    xfs: clear PF_MEMALLOC before exiting xfsaild thread

Yang Shi <yang.shi@linux.alibaba.com>
    mm: shmem: disable interrupt when acquiring info->lock in userfaultfd_copy path

Luke Nelson <lukenels@cs.washington.edu>
    bpf, x86_32: Fix incorrect encoding in BPF_LDX zero-extension

Ian Rogers <irogers@google.com>
    perf/core: fix parent pid/tid in task exit events

Niklas Schnelle <schnelle@linux.ibm.com>
    net/mlx5: Fix failing fw tracer allocation on s390

Toke Høiland-Jørgensen <toke@redhat.com>
    cpumap: Avoid warning when CONFIG_DEBUG_PER_CPU_MAPS is enabled

Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
    ARM: dts: bcm283x: Disable dsi0 node

Bjorn Helgaas <bhelgaas@google.com>
    PCI: Move Apex Edge TPU class quirk to fix BAR assignment

Kai-Heng Feng <kai.heng.feng@canonical.com>
    PCI: Avoid ASMedia XHCI USB PME# from D0 defect

Chuck Lever <chuck.lever@oracle.com>
    svcrdma: Fix leak of svc_rdma_recv_ctxt objects

Chuck Lever <chuck.lever@oracle.com>
    svcrdma: Fix trace point use-after-free race

Brian Foster <bfoster@redhat.com>
    xfs: acquire superblock freeze protection on eofblocks scans

Jason Gunthorpe <jgg@ziepe.ca>
    net/cxgb4: Check the return from t4_query_params properly

David Howells <dhowells@redhat.com>
    rxrpc: Fix DATA Tx to disable nofrag for UDP on AF_INET6 socket

Wolfram Sang <wsa+renesas@sang-engineering.com>
    i2c: altera: use proper variable to hold errno

Vasily Averin <vvs@virtuozzo.com>
    nfsd: memory corruption in nfsd4_lock()

Shengjiu Wang <shengjiu.wang@nxp.com>
    ASoC: wm8960: Fix wrong clock after suspend & resume

Philipp Puschmann <p.puschmann@pironex.de>
    ASoC: tas571x: disable regulators on failed probe

Stephan Gerhold <stephan@gerhold.net>
    ASoC: q6dsp6: q6afe-dai: add missing channels to MI2S DAIs

YueHaibing <yuehaibing@huawei.com>
    iio:ad7797: Use correct attribute_group

Nathan Chancellor <natechancellor@gmail.com>
    usb: gadget: udc: bdc: Remove unnecessary NULL checks in bdc_req_complete

Thinh Nguyen <Thinh.Nguyen@synopsys.com>
    usb: dwc3: gadget: Do link recovery for SS and SSP

Tyler Hicks <tyhicks@canonical.com>
    binder: take read mode of mmap_sem in binder_alloc_free_page()

Christian Borntraeger <borntraeger@de.ibm.com>
    include/uapi/linux/swab.h: fix userspace breakage, use __BITS_PER_LONG for swap

Liu Jian <liujian56@huawei.com>
    mtd: cfi: fix deadloop in cfi_cmdset_0002.c do_write_buffer

Clement Leger <cleger@kalray.eu>
    remoteproc: Fix wrong rvring index computation


-------------

Diffstat:

 Makefile                                           |   4 +-
 arch/arm/boot/dts/bcm283x.dtsi                     |   1 +
 arch/arm64/include/asm/sysreg.h                    |   4 +-
 arch/x86/kernel/cpu/mshyperv.c                     |   4 +-
 arch/x86/net/bpf_jit_comp.c                        |  18 ++-
 arch/x86/net/bpf_jit_comp32.c                      |  24 +++-
 drivers/android/binder_alloc.c                     |   8 +-
 drivers/hwmon/jc42.c                               |   2 +-
 drivers/i2c/busses/i2c-altera.c                    |   9 +-
 drivers/iio/adc/ad7793.c                           |   2 +-
 drivers/mtd/chips/cfi_cmdset_0002.c                |   6 +-
 drivers/net/ethernet/chelsio/cxgb4/t4_hw.c         |   2 +-
 drivers/net/ethernet/freescale/fec.h               |   7 +
 drivers/net/ethernet/freescale/fec_main.c          | 149 +++++++++++++++++----
 .../ethernet/mellanox/mlx5/core/diag/fw_tracer.c   |   6 +-
 drivers/net/ethernet/qlogic/qed/qed_dev.c          |  38 +++---
 drivers/pci/quirks.c                               |  18 +++
 drivers/remoteproc/remoteproc_core.c               |   2 +-
 drivers/staging/gasket/apex_driver.c               |   7 -
 drivers/target/target_core_fabric_lib.c            |   2 +-
 drivers/target/target_core_user.c                  |   1 +
 drivers/usb/dwc3/gadget.c                          |   8 +-
 drivers/usb/gadget/udc/bdc/bdc_ep.c                |   2 +-
 drivers/xen/xenbus/xenbus_client.c                 |   9 +-
 fs/ext4/ialloc.c                                   |   2 +-
 fs/ext4/inode.c                                    |   2 +-
 fs/ext4/mballoc.c                                  |   6 +-
 fs/ext4/super.c                                    |   3 +-
 fs/nfsd/nfs4state.c                                |   2 +
 fs/xfs/xfs_icache.c                                |  10 ++
 fs/xfs/xfs_ioctl.c                                 |   5 +-
 fs/xfs/xfs_reflink.c                               |   1 +
 fs/xfs/xfs_trans_ail.c                             |   4 +-
 include/linux/qed/qed_chain.h                      |  24 ++--
 include/linux/sunrpc/svc_rdma.h                    |   1 +
 include/trace/events/rpcrdma.h                     |  50 +++++--
 include/uapi/linux/swab.h                          |   4 +-
 kernel/bpf/cpumap.c                                |   2 +-
 kernel/events/core.c                               |  13 +-
 mm/shmem.c                                         |   4 +-
 net/rxrpc/local_object.c                           |   9 --
 net/rxrpc/output.c                                 |  44 ++----
 net/sunrpc/svc_xprt.c                              |   3 -
 net/sunrpc/svcsock.c                               |   4 +
 net/sunrpc/xprtrdma/svc_rdma_recvfrom.c            |  22 +++
 net/sunrpc/xprtrdma/svc_rdma_rw.c                  |   3 +-
 net/sunrpc/xprtrdma/svc_rdma_sendto.c              |  29 ++--
 net/sunrpc/xprtrdma/svc_rdma_transport.c           |   5 -
 sound/pci/hda/hda_intel.c                          |  17 ++-
 sound/soc/codecs/tas571x.c                         |  20 ++-
 sound/soc/codecs/wm8960.c                          |   3 +-
 sound/soc/qcom/qdsp6/q6afe-dai.c                   |  16 +++
 tools/objtool/check.c                              |  17 ++-
 tools/objtool/orc_dump.c                           |  44 +++---
 54 files changed, 467 insertions(+), 235 deletions(-)

[PATCH 4.19 01/46] remoteproc: Fix wrong rvring index computation

[Greg Kroah-Hartman]

From: Clement Leger <cleger@kalray.eu>

commit 00a0eec59ddbb1ce966b19097d8a8d2f777e726a upstream.

Index of rvring is computed using pointer arithmetic. However, since
rvring->rvdev->vring is the base of the vring array, computation
of rvring idx should be reversed. It previously lead to writing at negative
indices in the resource table.

Signed-off-by: Clement Leger <cleger@kalray.eu>
Link: https://lore.kernel.org/r/20191004073736.8327-1-cleger@kalray.eu
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Doug Anderson <dianders@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/remoteproc/remoteproc_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -289,7 +289,7 @@ void rproc_free_vring(struct rproc_vring
 {
 	int size = PAGE_ALIGN(vring_size(rvring->len, rvring->align));
 	struct rproc *rproc = rvring->rvdev->rproc;
-	int idx = rvring->rvdev->vring - rvring;
+	int idx = rvring - rvring->rvdev->vring;
 	struct fw_rsc_vdev *rsc;
 
 	dma_free_coherent(rproc->dev.parent, size, rvring->va, rvring->dma);

[PATCH 4.19 02/46] mtd: cfi: fix deadloop in cfi_cmdset_0002.c do_write_buffer

[Greg Kroah-Hartman]

From: Liu Jian <liujian56@huawei.com>

commit d9b8a67b3b95a5c5aae6422b8113adc1c2485f2b upstream.

In function do_write_buffer(), in the for loop, there is a case
chip_ready() returns 1 while chip_good() returns 0, so it never
break the loop.
To fix this, chip_good() is enough and it should timeout if it stay
bad for a while.

Fixes: dfeae1073583("mtd: cfi_cmdset_0002: Change write buffer to check correct value")
Signed-off-by: Yi Huaijie <yihuaijie@huawei.com>
Signed-off-by: Liu Jian <liujian56@huawei.com>
Reviewed-by: Tokunori Ikegami <ikegami_to@yahoo.co.jp>
Signed-off-by: Richard Weinberger <richard@nod.at>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mtd/chips/cfi_cmdset_0002.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -1882,7 +1882,11 @@ static int __xipram do_write_buffer(stru
 			continue;
 		}
 
-		if (time_after(jiffies, timeo) && !chip_ready(map, adr))
+		/*
+		 * We check "time_after" and "!chip_good" before checking "chip_good" to avoid
+		 * the failure due to scheduling.
+		 */
+		if (time_after(jiffies, timeo) && !chip_good(map, adr, datum))
 			break;
 
 		if (chip_good(map, adr, datum)) {

[PATCH 4.19 03/46] include/uapi/linux/swab.h: fix userspace breakage, use __BITS_PER_LONG for swap

[Greg Kroah-Hartman]

From: Christian Borntraeger <borntraeger@de.ibm.com>

commit 467d12f5c7842896d2de3ced74e4147ee29e97c8 upstream.

QEMU has a funny new build error message when I use the upstream kernel
headers:

      CC      block/file-posix.o
    In file included from /home/cborntra/REPOS/qemu/include/qemu/timer.h:4,
                     from /home/cborntra/REPOS/qemu/include/qemu/timed-average.h:29,
                     from /home/cborntra/REPOS/qemu/include/block/accounting.h:28,
                     from /home/cborntra/REPOS/qemu/include/block/block_int.h:27,
                     from /home/cborntra/REPOS/qemu/block/file-posix.c:30:
    /usr/include/linux/swab.h: In function `__swab':
    /home/cborntra/REPOS/qemu/include/qemu/bitops.h:20:34: error: "sizeof" is not defined, evaluates to 0 [-Werror=undef]
       20 | #define BITS_PER_LONG           (sizeof (unsigned long) * BITS_PER_BYTE)
          |                                  ^~~~~~
    /home/cborntra/REPOS/qemu/include/qemu/bitops.h:20:41: error: missing binary operator before token "("
       20 | #define BITS_PER_LONG           (sizeof (unsigned long) * BITS_PER_BYTE)
          |                                         ^
    cc1: all warnings being treated as errors
    make: *** [/home/cborntra/REPOS/qemu/rules.mak:69: block/file-posix.o] Error 1
    rm tests/qemu-iotests/socket_scm_helper.o

This was triggered by commit d5767057c9a ("uapi: rename ext2_swab() to
swab() and share globally in swab.h").  That patch is doing

  #include <asm/bitsperlong.h>

but it uses BITS_PER_LONG.

The kernel file asm/bitsperlong.h provide only __BITS_PER_LONG.

Let us use the __ variant in swap.h

Link: http://lkml.kernel.org/r/20200213142147.17604-1-borntraeger@de.ibm.com
Fixes: d5767057c9a ("uapi: rename ext2_swab() to swab() and share globally in swab.h")
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Yury Norov <yury.norov@gmail.com>
Cc: Allison Randal <allison@lohutok.net>
Cc: Joe Perches <joe@perches.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 include/uapi/linux/swab.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/include/uapi/linux/swab.h
+++ b/include/uapi/linux/swab.h
@@ -135,9 +135,9 @@ static inline __attribute_const__ __u32
 
 static __always_inline unsigned long __swab(const unsigned long y)
 {
-#if BITS_PER_LONG == 64
+#if __BITS_PER_LONG == 64
 	return __swab64(y);
-#else /* BITS_PER_LONG == 32 */
+#else /* __BITS_PER_LONG == 32 */
 	return __swab32(y);
 #endif
 }

[PATCH 4.19 04/46] binder: take read mode of mmap_sem in binder_alloc_free_page()

[Greg Kroah-Hartman]

From: Tyler Hicks <tyhicks@canonical.com>

commit 60d4885710836595192c42d3e04b27551d30ec91 upstream.

Restore the behavior of locking mmap_sem for reading in
binder_alloc_free_page(), as was first done in commit 3013bf62b67a
("binder: reduce mmap_sem write-side lock"). That change was
inadvertently reverted by commit 5cec2d2e5839 ("binder: fix race between
munmap() and direct reclaim").

In addition, change the name of the label for the error path to
accurately reflect that we're taking the lock for reading.

Backporting note: This fix is only needed when *both* of the commits
mentioned above are applied. That's an unlikely situation since they
both landed during the development of v5.1 but only one of them is
targeted for stable.

Fixes: 5cec2d2e5839 ("binder: fix race between munmap() and direct reclaim")
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Acked-by: Todd Kjos <tkjos@android.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/android/binder_alloc.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/android/binder_alloc.c
+++ b/drivers/android/binder_alloc.c
@@ -970,8 +970,8 @@ enum lru_status binder_alloc_free_page(s
 	mm = alloc->vma_vm_mm;
 	if (!mmget_not_zero(mm))
 		goto err_mmget;
-	if (!down_write_trylock(&mm->mmap_sem))
-		goto err_down_write_mmap_sem_failed;
+	if (!down_read_trylock(&mm->mmap_sem))
+		goto err_down_read_mmap_sem_failed;
 	vma = binder_alloc_get_vma(alloc);
 
 	list_lru_isolate(lru, item);
@@ -986,7 +986,7 @@ enum lru_status binder_alloc_free_page(s
 
 		trace_binder_unmap_user_end(alloc, index);
 	}
-	up_write(&mm->mmap_sem);
+	up_read(&mm->mmap_sem);
 	mmput(mm);
 
 	trace_binder_unmap_kernel_start(alloc, index);
@@ -1001,7 +1001,7 @@ enum lru_status binder_alloc_free_page(s
 	mutex_unlock(&alloc->mutex);
 	return LRU_REMOVED_RETRY;
 
-err_down_write_mmap_sem_failed:
+err_down_read_mmap_sem_failed:
 	mmput_async(mm);
 err_mmget:
 err_page_already_freed:

[PATCH 4.19 05/46] usb: dwc3: gadget: Do link recovery for SS and SSP

[Greg Kroah-Hartman]

From: Thinh Nguyen <Thinh.Nguyen@synopsys.com>

commit d0550cd20e52558ecf6847a0f96ebd5d944c17e4 upstream.

The controller always supports link recovery for device in SS and SSP.
Remove the speed limit check. Also, when the device is in RESUME or
RESET state, it means the controller received the resume/reset request.
The driver must send the link recovery to acknowledge the request. They
are valid states for the driver to send link recovery.

Fixes: 72246da40f37 ("usb: Introduce DesignWare USB3 DRD Driver")
Fixes: ee5cd41c9117 ("usb: dwc3: Update speed checks for SuperSpeedPlus")
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/dwc3/gadget.c |    8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1577,7 +1577,6 @@ static int __dwc3_gadget_wakeup(struct d
 	u32			reg;
 
 	u8			link_state;
-	u8			speed;
 
 	/*
 	 * According to the Databook Remote wakeup request should
@@ -1587,16 +1586,13 @@ static int __dwc3_gadget_wakeup(struct d
 	 */
 	reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 
-	speed = reg & DWC3_DSTS_CONNECTSPD;
-	if ((speed == DWC3_DSTS_SUPERSPEED) ||
-	    (speed == DWC3_DSTS_SUPERSPEED_PLUS))
-		return 0;
-
 	link_state = DWC3_DSTS_USBLNKST(reg);
 
 	switch (link_state) {
+	case DWC3_LINK_STATE_RESET:
 	case DWC3_LINK_STATE_RX_DET:	/* in HS, means Early Suspend */
 	case DWC3_LINK_STATE_U3:	/* in HS, means SUSPEND */
+	case DWC3_LINK_STATE_RESUME:
 		break;
 	default:
 		return -EINVAL;

[PATCH 4.19 06/46] usb: gadget: udc: bdc: Remove unnecessary NULL checks in bdc_req_complete

[Greg Kroah-Hartman]

From: Nathan Chancellor <natechancellor@gmail.com>

commit 09b04abb70f096333bef6bc95fa600b662e7ee13 upstream.

When building with Clang + -Wtautological-pointer-compare:

drivers/usb/gadget/udc/bdc/bdc_ep.c:543:28: warning: comparison of
address of 'req->queue' equal to a null pointer is always false
[-Wtautological-pointer-compare]
        if (req == NULL  || &req->queue == NULL || &req->usb_req == NULL)
                             ~~~~~^~~~~    ~~~~
drivers/usb/gadget/udc/bdc/bdc_ep.c:543:51: warning: comparison of
address of 'req->usb_req' equal to a null pointer is always false
[-Wtautological-pointer-compare]
        if (req == NULL  || &req->queue == NULL || &req->usb_req == NULL)
                                                    ~~~~~^~~~~~~    ~~~~
2 warnings generated.

As it notes, these statements will always evaluate to false so remove
them.

Fixes: efed421a94e6 ("usb: gadget: Add UDC driver for Broadcom USB3.0 device controller IP BDC")
Link: https://github.com/ClangBuiltLinux/linux/issues/749
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/gadget/udc/bdc/bdc_ep.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/gadget/udc/bdc/bdc_ep.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_ep.c
@@ -540,7 +540,7 @@ static void bdc_req_complete(struct bdc_
 {
 	struct bdc *bdc = ep->bdc;
 
-	if (req == NULL  || &req->queue == NULL || &req->usb_req == NULL)
+	if (req == NULL)
 		return;
 
 	dev_dbg(bdc->dev, "%s ep:%s status:%d\n", __func__, ep->name, status);

[PATCH 4.19 07/46] iio:ad7797: Use correct attribute_group

[Greg Kroah-Hartman]

From: YueHaibing <yuehaibing@huawei.com>

commit 28535877ac5b2b84f0d394fd67a5ec71c0c48b10 upstream.

It should use ad7797_attribute_group in ad7797_info,
according to commit ("iio:ad7793: Add support for the ad7796 and ad7797").

Scale is fixed for the ad7796 and not programmable, hence
should not have the scale_available attribute.

Fixes: fd1a8b912841 ("iio:ad7793: Add support for the ad7796 and ad7797")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/iio/adc/ad7793.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/adc/ad7793.c
+++ b/drivers/iio/adc/ad7793.c
@@ -542,7 +542,7 @@ static const struct iio_info ad7797_info
 	.read_raw = &ad7793_read_raw,
 	.write_raw = &ad7793_write_raw,
 	.write_raw_get_fmt = &ad7793_write_raw_get_fmt,
-	.attrs = &ad7793_attribute_group,
+	.attrs = &ad7797_attribute_group,
 	.validate_trigger = ad_sd_validate_trigger,
 };
 

[PATCH 4.19 08/46] ASoC: q6dsp6: q6afe-dai: add missing channels to MI2S DAIs

[Greg Kroah-Hartman]

From: Stephan Gerhold <stephan@gerhold.net>

commit 0c824ec094b5cda766c80d88c2036e28c24a4cb1 upstream.

For some reason, the MI2S DAIs do not have channels_min/max defined.
This means that snd_soc_dai_stream_valid() returns false,
i.e. the DAIs have neither valid playback nor capture stream.

It's quite surprising that this ever worked correctly,
but in 5.7-rc1 this is now failing badly: :)

Commit 0e9cf4c452ad ("ASoC: pcm: check if cpu-dai supports a given stream")
introduced a check for snd_soc_dai_stream_valid() before calling
hw_params(), which means that the q6i2s_hw_params() function
was never called, eventually resulting in:

    qcom-q6afe aprsvc:q6afe:4:4: no line is assigned

... even though "qcom,sd-lines" is set in the device tree.

Commit 9b5db059366a ("ASoC: soc-pcm: dpcm: Only allow playback/capture if supported")
now even avoids creating PCM devices if the stream is not supported,
which means that it is failing even earlier with e.g.:

    Primary MI2S: ASoC: no backend playback stream

Avoid all that trouble by adding channels_min/max for the MI2S DAIs.

Fixes: 24c4cbcfac09 ("ASoC: qdsp6: q6afe: Add q6afe dai driver")
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200415150050.616392-1-stephan@gerhold.net
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/soc/qcom/qdsp6/q6afe-dai.c |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

--- a/sound/soc/qcom/qdsp6/q6afe-dai.c
+++ b/sound/soc/qcom/qdsp6/q6afe-dai.c
@@ -899,6 +899,8 @@ static struct snd_soc_dai_driver q6afe_d
 				 SNDRV_PCM_RATE_16000,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE |
 				   SNDRV_PCM_FMTBIT_S24_LE,
+			.channels_min = 1,
+			.channels_max = 8,
 			.rate_min =     8000,
 			.rate_max =     48000,
 		},
@@ -914,6 +916,8 @@ static struct snd_soc_dai_driver q6afe_d
 				 SNDRV_PCM_RATE_16000,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE |
 				   SNDRV_PCM_FMTBIT_S24_LE,
+			.channels_min = 1,
+			.channels_max = 8,
 			.rate_min =     8000,
 			.rate_max =     48000,
 		},
@@ -928,6 +932,8 @@ static struct snd_soc_dai_driver q6afe_d
 			.rates = SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_8000 |
 				 SNDRV_PCM_RATE_16000,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+			.channels_min = 1,
+			.channels_max = 8,
 			.rate_min =     8000,
 			.rate_max =     48000,
 		},
@@ -943,6 +949,8 @@ static struct snd_soc_dai_driver q6afe_d
 				 SNDRV_PCM_RATE_16000,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE |
 				   SNDRV_PCM_FMTBIT_S24_LE,
+			.channels_min = 1,
+			.channels_max = 8,
 			.rate_min =     8000,
 			.rate_max =     48000,
 		},
@@ -957,6 +965,8 @@ static struct snd_soc_dai_driver q6afe_d
 			.rates = SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_8000 |
 				 SNDRV_PCM_RATE_16000,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+			.channels_min = 1,
+			.channels_max = 8,
 			.rate_min =     8000,
 			.rate_max =     48000,
 		},
@@ -972,6 +982,8 @@ static struct snd_soc_dai_driver q6afe_d
 				 SNDRV_PCM_RATE_16000,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE |
 				   SNDRV_PCM_FMTBIT_S24_LE,
+			.channels_min = 1,
+			.channels_max = 8,
 			.rate_min =     8000,
 			.rate_max =     48000,
 		},
@@ -986,6 +998,8 @@ static struct snd_soc_dai_driver q6afe_d
 			.rates = SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_8000 |
 				 SNDRV_PCM_RATE_16000,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+			.channels_min = 1,
+			.channels_max = 8,
 			.rate_min =     8000,
 			.rate_max =     48000,
 		},
@@ -1001,6 +1015,8 @@ static struct snd_soc_dai_driver q6afe_d
 				 SNDRV_PCM_RATE_16000,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE |
 				   SNDRV_PCM_FMTBIT_S24_LE,
+			.channels_min = 1,
+			.channels_max = 8,
 			.rate_min =     8000,
 			.rate_max =     48000,
 		},

[PATCH 4.19 09/46] ASoC: tas571x: disable regulators on failed probe

[Greg Kroah-Hartman]

From: Philipp Puschmann <p.puschmann@pironex.de>

commit 9df8ba7c63073508e5aa677dade48fcab6a6773e upstream.

If probe fails after enabling the regulators regulator_put is called for
each supply without having them disabled before. This produces some
warnings like

WARNING: CPU: 0 PID: 90 at drivers/regulator/core.c:2044 _regulator_put.part.0+0x154/0x15c
[<c010f7a8>] (unwind_backtrace) from [<c010c544>] (show_stack+0x10/0x14)
[<c010c544>] (show_stack) from [<c012b640>] (__warn+0xd0/0xf4)
[<c012b640>] (__warn) from [<c012b9b4>] (warn_slowpath_fmt+0x64/0xc4)
[<c012b9b4>] (warn_slowpath_fmt) from [<c04c4064>] (_regulator_put.part.0+0x154/0x15c)
[<c04c4064>] (_regulator_put.part.0) from [<c04c4094>] (regulator_put+0x28/0x38)
[<c04c4094>] (regulator_put) from [<c04c40cc>] (regulator_bulk_free+0x28/0x38)
[<c04c40cc>] (regulator_bulk_free) from [<c0579b2c>] (release_nodes+0x1d0/0x22c)
[<c0579b2c>] (release_nodes) from [<c05756dc>] (really_probe+0x108/0x34c)
[<c05756dc>] (really_probe) from [<c0575aec>] (driver_probe_device+0xb8/0x16c)
[<c0575aec>] (driver_probe_device) from [<c0575d40>] (device_driver_attach+0x58/0x60)
[<c0575d40>] (device_driver_attach) from [<c0575da0>] (__driver_attach+0x58/0xcc)
[<c0575da0>] (__driver_attach) from [<c0573978>] (bus_for_each_dev+0x78/0xc0)
[<c0573978>] (bus_for_each_dev) from [<c0574b5c>] (bus_add_driver+0x188/0x1e0)
[<c0574b5c>] (bus_add_driver) from [<c05768b0>] (driver_register+0x74/0x108)
[<c05768b0>] (driver_register) from [<c061ab7c>] (i2c_register_driver+0x3c/0x88)
[<c061ab7c>] (i2c_register_driver) from [<c0102df8>] (do_one_initcall+0x58/0x250)
[<c0102df8>] (do_one_initcall) from [<c01a91bc>] (do_init_module+0x60/0x244)
[<c01a91bc>] (do_init_module) from [<c01ab5a4>] (load_module+0x2180/0x2540)
[<c01ab5a4>] (load_module) from [<c01abbd4>] (sys_finit_module+0xd0/0xe8)
[<c01abbd4>] (sys_finit_module) from [<c01011e0>] (__sys_trace_return+0x0/0x20)

Fixes: 3fd6e7d9a146 (ASoC: tas571x: New driver for TI TAS571x power amplifiers)
Signed-off-by: Philipp Puschmann <p.puschmann@pironex.de>
Link: https://lore.kernel.org/r/20200414112754.3365406-1-p.puschmann@pironex.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/soc/codecs/tas571x.c |   20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

--- a/sound/soc/codecs/tas571x.c
+++ b/sound/soc/codecs/tas571x.c
@@ -824,8 +824,10 @@ static int tas571x_i2c_probe(struct i2c_
 
 	priv->regmap = devm_regmap_init(dev, NULL, client,
 					priv->chip->regmap_config);
-	if (IS_ERR(priv->regmap))
-		return PTR_ERR(priv->regmap);
+	if (IS_ERR(priv->regmap)) {
+		ret = PTR_ERR(priv->regmap);
+		goto disable_regs;
+	}
 
 	priv->pdn_gpio = devm_gpiod_get_optional(dev, "pdn", GPIOD_OUT_LOW);
 	if (IS_ERR(priv->pdn_gpio)) {
@@ -849,7 +851,7 @@ static int tas571x_i2c_probe(struct i2c_
 
 	ret = regmap_write(priv->regmap, TAS571X_OSC_TRIM_REG, 0);
 	if (ret)
-		return ret;
+		goto disable_regs;
 
 	usleep_range(50000, 60000);
 
@@ -865,12 +867,20 @@ static int tas571x_i2c_probe(struct i2c_
 		 */
 		ret = regmap_update_bits(priv->regmap, TAS571X_MVOL_REG, 1, 0);
 		if (ret)
-			return ret;
+			goto disable_regs;
 	}
 
-	return devm_snd_soc_register_component(&client->dev,
+	ret = devm_snd_soc_register_component(&client->dev,
 				      &priv->component_driver,
 				      &tas571x_dai, 1);
+	if (ret)
+		goto disable_regs;
+
+	return ret;
+
+disable_regs:
+	regulator_bulk_disable(priv->chip->num_supply_names, priv->supplies);
+	return ret;
 }
 
 static int tas571x_i2c_remove(struct i2c_client *client)

[PATCH 4.19 10/46] ASoC: wm8960: Fix wrong clock after suspend & resume

[Greg Kroah-Hartman]

From: Shengjiu Wang <shengjiu.wang@nxp.com>

commit 1e060a453c8604311fb45ae2f84f67ed673329b4 upstream.

After suspend & resume, wm8960_hw_params may be called when
bias_level is not SND_SOC_BIAS_ON, then wm8960_configure_clocking
is not called. But if sample rate is changed at that time, then
the output clock rate will be not correct.

So judgement of bias_level is SND_SOC_BIAS_ON in wm8960_hw_params
is not necessary and it causes above issue.

Fixes: 3176bf2d7ccd ("ASoC: wm8960: update pll and clock setting function")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/1587468525-27514-1-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/soc/codecs/wm8960.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/sound/soc/codecs/wm8960.c
+++ b/sound/soc/codecs/wm8960.c
@@ -863,8 +863,7 @@ static int wm8960_hw_params(struct snd_p
 
 	wm8960->is_stream_in_use[tx] = true;
 
-	if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_ON &&
-	    !wm8960->is_stream_in_use[!tx])
+	if (!wm8960->is_stream_in_use[!tx])
 		return wm8960_configure_clocking(component);
 
 	return 0;

[PATCH 4.19 11/46] nfsd: memory corruption in nfsd4_lock()

[Greg Kroah-Hartman]

From: Vasily Averin <vvs@virtuozzo.com>

commit e1e8399eee72e9d5246d4d1bcacd793debe34dd3 upstream.

New struct nfsd4_blocked_lock allocated in find_or_allocate_block()
does not initialized nbl_list and nbl_lru.
If conflock allocation fails rollback can call list_del_init()
access uninitialized fields and corrupt memory.

v2: just initialize nbl_list and nbl_lru right after nbl allocation.

Fixes: 76d348fadff5 ("nfsd: have nfsd4_lock use blocking locks for v4.1+ lock")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/nfsd/nfs4state.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -252,6 +252,8 @@ find_or_allocate_block(struct nfs4_locko
 	if (!nbl) {
 		nbl= kmalloc(sizeof(*nbl), GFP_KERNEL);
 		if (nbl) {
+			INIT_LIST_HEAD(&nbl->nbl_list);
+			INIT_LIST_HEAD(&nbl->nbl_lru);
 			fh_copy_shallow(&nbl->nbl_fh, fh);
 			locks_init_lock(&nbl->nbl_lock);
 			nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client,

[PATCH 4.19 12/46] i2c: altera: use proper variable to hold errno

[Greg Kroah-Hartman]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit edb2c9dd3948738ef030c32b948543e84f4d3f81 upstream.

device_property_read_u32() returns errno or 0, so we should use the
integer variable 'ret' and not the u32 'val' to hold the retval.

Fixes: 0560ad576268 ("i2c: altera: Add Altera I2C Controller driver")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Thor Thayer <thor.thayer@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/i2c/busses/i2c-altera.c |    9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

--- a/drivers/i2c/busses/i2c-altera.c
+++ b/drivers/i2c/busses/i2c-altera.c
@@ -395,7 +395,6 @@ static int altr_i2c_probe(struct platfor
 	struct altr_i2c_dev *idev = NULL;
 	struct resource *res;
 	int irq, ret;
-	u32 val;
 
 	idev = devm_kzalloc(&pdev->dev, sizeof(*idev), GFP_KERNEL);
 	if (!idev)
@@ -422,17 +421,17 @@ static int altr_i2c_probe(struct platfor
 	init_completion(&idev->msg_complete);
 	spin_lock_init(&idev->lock);
 
-	val = device_property_read_u32(idev->dev, "fifo-size",
+	ret = device_property_read_u32(idev->dev, "fifo-size",
 				       &idev->fifo_size);
-	if (val) {
+	if (ret) {
 		dev_err(&pdev->dev, "FIFO size set to default of %d\n",
 			ALTR_I2C_DFLT_FIFO_SZ);
 		idev->fifo_size = ALTR_I2C_DFLT_FIFO_SZ;
 	}
 
-	val = device_property_read_u32(idev->dev, "clock-frequency",
+	ret = device_property_read_u32(idev->dev, "clock-frequency",
 				       &idev->bus_clk_rate);
-	if (val) {
+	if (ret) {
 		dev_err(&pdev->dev, "Default to 100kHz\n");
 		idev->bus_clk_rate = 100000;	/* default clock rate */
 	}

[PATCH 4.19 13/46] rxrpc: Fix DATA Tx to disable nofrag for UDP on AF_INET6 socket

[Greg Kroah-Hartman]

From: David Howells <dhowells@redhat.com>

commit 0e631eee17dcea576ab922fa70e4fdbd596ee452 upstream.

Fix the DATA packet transmission to disable nofrag for UDPv4 on an AF_INET6
socket as well as UDPv6 when trying to transmit fragmentably.

Without this, packets filled to the normal size used by the kernel AFS
client of 1412 bytes be rejected by udp_sendmsg() with EMSGSIZE
immediately.  The ->sk_error_report() notification hook is called, but
rxrpc doesn't generate a trace for it.

This is a temporary fix; a more permanent solution needs to involve
changing the size of the packets being filled in accordance with the MTU,
which isn't currently done in AF_RXRPC.  The reason for not doing so was
that, barring the last packet in an rx jumbo packet, jumbos can only be
assembled out of 1412-byte packets - and the plan was to construct jumbos
on the fly at transmission time.

Also, there's no point turning on IPV6_MTU_DISCOVER, since IPv6 has to
engage in this anyway since fragmentation is only done by the sender.  We
can then condense the switch-statement in rxrpc_send_data_packet().

Fixes: 75b54cb57ca3 ("rxrpc: Add IPv6 support")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/rxrpc/local_object.c |    9 ---------
 net/rxrpc/output.c       |   42 +++++++++++-------------------------------
 2 files changed, 11 insertions(+), 40 deletions(-)

--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -169,15 +169,6 @@ static int rxrpc_open_socket(struct rxrp
 			goto error;
 		}
 
-		/* we want to set the don't fragment bit */
-		opt = IPV6_PMTUDISC_DO;
-		ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_MTU_DISCOVER,
-					(char *) &opt, sizeof(opt));
-		if (ret < 0) {
-			_debug("setsockopt failed");
-			goto error;
-		}
-
 		/* Fall through and set IPv4 options too otherwise we don't get
 		 * errors from IPv4 packets sent through the IPv6 socket.
 		 */
--- a/net/rxrpc/output.c
+++ b/net/rxrpc/output.c
@@ -480,41 +480,21 @@ send_fragmentable:
 	skb->tstamp = ktime_get_real();
 
 	switch (conn->params.local->srx.transport.family) {
+	case AF_INET6:
 	case AF_INET:
 		opt = IP_PMTUDISC_DONT;
-		ret = kernel_setsockopt(conn->params.local->socket,
-					SOL_IP, IP_MTU_DISCOVER,
-					(char *)&opt, sizeof(opt));
-		if (ret == 0) {
-			ret = kernel_sendmsg(conn->params.local->socket, &msg,
-					     iov, 2, len);
-			conn->params.peer->last_tx_at = ktime_get_seconds();
-
-			opt = IP_PMTUDISC_DO;
-			kernel_setsockopt(conn->params.local->socket, SOL_IP,
-					  IP_MTU_DISCOVER,
-					  (char *)&opt, sizeof(opt));
-		}
-		break;
-
-#ifdef CONFIG_AF_RXRPC_IPV6
-	case AF_INET6:
-		opt = IPV6_PMTUDISC_DONT;
-		ret = kernel_setsockopt(conn->params.local->socket,
-					SOL_IPV6, IPV6_MTU_DISCOVER,
-					(char *)&opt, sizeof(opt));
-		if (ret == 0) {
-			ret = kernel_sendmsg(conn->params.local->socket, &msg,
-					     iov, 2, len);
-			conn->params.peer->last_tx_at = ktime_get_seconds();
+		kernel_setsockopt(conn->params.local->socket,
+				  SOL_IP, IP_MTU_DISCOVER,
+				  (char *)&opt, sizeof(opt));
+		ret = kernel_sendmsg(conn->params.local->socket, &msg,
+				     iov, 2, len);
+		conn->params.peer->last_tx_at = ktime_get_seconds();
 
-			opt = IPV6_PMTUDISC_DO;
-			kernel_setsockopt(conn->params.local->socket,
-					  SOL_IPV6, IPV6_MTU_DISCOVER,
-					  (char *)&opt, sizeof(opt));
-		}
+		opt = IP_PMTUDISC_DO;
+		kernel_setsockopt(conn->params.local->socket,
+				  SOL_IP, IP_MTU_DISCOVER,
+				  (char *)&opt, sizeof(opt));
 		break;
-#endif
 
 	default:
 		BUG();

[PATCH 4.19 14/46] net/cxgb4: Check the return from t4_query_params properly

[Greg Kroah-Hartman]

From: Jason Gunthorpe <jgg@mellanox.com>

commit c799fca8baf18d1bbbbad6c3b736eefbde8bdb90 upstream.

Positive return values are also failures that don't set val,
although this probably can't happen. Fixes gcc 10 warning:

drivers/net/ethernet/chelsio/cxgb4/t4_hw.c: In function ‘t4_phy_fw_ver’:
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c:3747:14: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized]
 3747 |  *phy_fw_ver = val;

Fixes: 01b6961410b7 ("cxgb4: Add PHY firmware support for T420-BT cards")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/ethernet/chelsio/cxgb4/t4_hw.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -3748,7 +3748,7 @@ int t4_phy_fw_ver(struct adapter *adap,
 		 FW_PARAMS_PARAM_Z_V(FW_PARAMS_PARAM_DEV_PHYFW_VERSION));
 	ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1,
 			      &param, &val);
-	if (ret < 0)
+	if (ret)
 		return ret;
 	*phy_fw_ver = val;
 	return 0;

[PATCH 4.19 15/46] xfs: acquire superblock freeze protection on eofblocks scans

[Greg Kroah-Hartman]

From: Brian Foster <bfoster@redhat.com>

commit 4b674b9ac852937af1f8c62f730c325fb6eadcdb upstream.

The filesystem freeze sequence in XFS waits on any background
eofblocks or cowblocks scans to complete before the filesystem is
quiesced. At this point, the freezer has already stopped the
transaction subsystem, however, which means a truncate or cowblock
cancellation in progress is likely blocked in transaction
allocation. This results in a deadlock between freeze and the
associated scanner.

Fix this problem by holding superblock write protection across calls
into the block reapers. Since protection for background scans is
acquired from the workqueue task context, trylock to avoid a similar
deadlock between freeze and blocking on the write lock.

Fixes: d6b636ebb1c9f ("xfs: halt auto-reclamation activities while rebuilding rmap")
Reported-by: Paul Furtado <paulfurtado91@gmail.com>
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Chandan Rajendra <chandanrlinux@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/xfs/xfs_icache.c |   10 ++++++++++
 fs/xfs/xfs_ioctl.c  |    5 ++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -902,7 +902,12 @@ xfs_eofblocks_worker(
 {
 	struct xfs_mount *mp = container_of(to_delayed_work(work),
 				struct xfs_mount, m_eofblocks_work);
+
+	if (!sb_start_write_trylock(mp->m_super))
+		return;
 	xfs_icache_free_eofblocks(mp, NULL);
+	sb_end_write(mp->m_super);
+
 	xfs_queue_eofblocks(mp);
 }
 
@@ -929,7 +934,12 @@ xfs_cowblocks_worker(
 {
 	struct xfs_mount *mp = container_of(to_delayed_work(work),
 				struct xfs_mount, m_cowblocks_work);
+
+	if (!sb_start_write_trylock(mp->m_super))
+		return;
 	xfs_icache_free_cowblocks(mp, NULL);
+	sb_end_write(mp->m_super);
+
 	xfs_queue_cowblocks(mp);
 }
 
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -2182,7 +2182,10 @@ xfs_file_ioctl(
 		if (error)
 			return error;
 
-		return xfs_icache_free_eofblocks(mp, &keofb);
+		sb_start_write(mp->m_super);
+		error = xfs_icache_free_eofblocks(mp, &keofb);
+		sb_end_write(mp->m_super);
+		return error;
 	}
 
 	default:

[PATCH 4.19 16/46] svcrdma: Fix trace point use-after-free race

[Greg Kroah-Hartman]

From: Chuck Lever <chuck.lever@oracle.com>

commit e28b4fc652c1830796a4d3e09565f30c20f9a2cf upstream.

I hit this while testing nfsd-5.7 with kernel memory debugging
enabled on my server:

Mar 30 13:21:45 klimt kernel: BUG: unable to handle page fault for address: ffff8887e6c279a8
Mar 30 13:21:45 klimt kernel: #PF: supervisor read access in kernel mode
Mar 30 13:21:45 klimt kernel: #PF: error_code(0x0000) - not-present page
Mar 30 13:21:45 klimt kernel: PGD 3601067 P4D 3601067 PUD 87c519067 PMD 87c3e2067 PTE 800ffff8193d8060
Mar 30 13:21:45 klimt kernel: Oops: 0000 [#1] SMP DEBUG_PAGEALLOC PTI
Mar 30 13:21:45 klimt kernel: CPU: 2 PID: 1933 Comm: nfsd Not tainted 5.6.0-rc6-00040-g881e87a3c6f9 #1591
Mar 30 13:21:45 klimt kernel: Hardware name: Supermicro Super Server/X10SRL-F, BIOS 1.0c 09/09/2015
Mar 30 13:21:45 klimt kernel: RIP: 0010:svc_rdma_post_chunk_ctxt+0xab/0x284 [rpcrdma]
Mar 30 13:21:45 klimt kernel: Code: c1 83 34 02 00 00 29 d0 85 c0 7e 72 48 8b bb a0 02 00 00 48 8d 54 24 08 4c 89 e6 48 8b 07 48 8b 40 20 e8 5a 5c 2b e1 41 89 c6 <8b> 45 20 89 44 24 04 8b 05 02 e9 01 00 85 c0 7e 33 e9 5e 01 00 00
Mar 30 13:21:45 klimt kernel: RSP: 0018:ffffc90000dfbdd8 EFLAGS: 00010286
Mar 30 13:21:45 klimt kernel: RAX: 0000000000000000 RBX: ffff8887db8db400 RCX: 0000000000000030
Mar 30 13:21:45 klimt kernel: RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000246
Mar 30 13:21:45 klimt kernel: RBP: ffff8887e6c27988 R08: 0000000000000000 R09: 0000000000000004
Mar 30 13:21:45 klimt kernel: R10: ffffc90000dfbdd8 R11: 00c068ef00000000 R12: ffff8887eb4e4a80
Mar 30 13:21:45 klimt kernel: R13: ffff8887db8db634 R14: 0000000000000000 R15: ffff8887fc931000
Mar 30 13:21:45 klimt kernel: FS:  0000000000000000(0000) GS:ffff88885bd00000(0000) knlGS:0000000000000000
Mar 30 13:21:45 klimt kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Mar 30 13:21:45 klimt kernel: CR2: ffff8887e6c279a8 CR3: 000000081b72e002 CR4: 00000000001606e0
Mar 30 13:21:45 klimt kernel: Call Trace:
Mar 30 13:21:45 klimt kernel: ? svc_rdma_vec_to_sg+0x7f/0x7f [rpcrdma]
Mar 30 13:21:45 klimt kernel: svc_rdma_send_write_chunk+0x59/0xce [rpcrdma]
Mar 30 13:21:45 klimt kernel: svc_rdma_sendto+0xf9/0x3ae [rpcrdma]
Mar 30 13:21:45 klimt kernel: ? nfsd_destroy+0x51/0x51 [nfsd]
Mar 30 13:21:45 klimt kernel: svc_send+0x105/0x1e3 [sunrpc]
Mar 30 13:21:45 klimt kernel: nfsd+0xf2/0x149 [nfsd]
Mar 30 13:21:45 klimt kernel: kthread+0xf6/0xfb
Mar 30 13:21:45 klimt kernel: ? kthread_queue_delayed_work+0x74/0x74
Mar 30 13:21:45 klimt kernel: ret_from_fork+0x3a/0x50
Mar 30 13:21:45 klimt kernel: Modules linked in: ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager ocfs2_stackglue ib_umad ib_ipoib mlx4_ib sb_edac x86_pkg_temp_thermal iTCO_wdt iTCO_vendor_support coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel glue_helper crypto_simd cryptd pcspkr rpcrdma i2c_i801 rdma_ucm lpc_ich mfd_core ib_iser rdma_cm iw_cm ib_cm mei_me raid0 libiscsi mei sg scsi_transport_iscsi ioatdma wmi ipmi_si ipmi_devintf ipmi_msghandler acpi_power_meter nfsd nfs_acl lockd auth_rpcgss grace sunrpc ip_tables xfs libcrc32c mlx4_en sd_mod sr_mod cdrom mlx4_core crc32c_intel igb nvme i2c_algo_bit ahci i2c_core libahci nvme_core dca libata t10_pi qedr dm_mirror dm_region_hash dm_log dm_mod dax qede qed crc8 ib_uverbs ib_core
Mar 30 13:21:45 klimt kernel: CR2: ffff8887e6c279a8
Mar 30 13:21:45 klimt kernel: ---[ end trace 87971d2ad3429424 ]---

It's absolutely not safe to use resources pointed to by the @send_wr
argument of ib_post_send() _after_ that function returns. Those
resources are typically freed by the Send completion handler, which
can run before ib_post_send() returns.

Thus the trace points currently around ib_post_send() in the
server's RPC/RDMA transport are a hazard, even when they are
disabled. Rearrange them so that they touch the Work Request only
_before_ ib_post_send() is invoked.

Fixes: bd2abef33394 ("svcrdma: Trace key RDMA API events")
Fixes: 4201c7464753 ("svcrdma: Introduce svc_rdma_send_ctxt")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 include/trace/events/rpcrdma.h        |   50 ++++++++++++++++++++++++----------
 net/sunrpc/xprtrdma/svc_rdma_rw.c     |    3 --
 net/sunrpc/xprtrdma/svc_rdma_sendto.c |   16 ++++++----
 3 files changed, 46 insertions(+), 23 deletions(-)

--- a/include/trace/events/rpcrdma.h
+++ b/include/trace/events/rpcrdma.h
@@ -1322,17 +1322,15 @@ DECLARE_EVENT_CLASS(svcrdma_sendcomp_eve
 
 TRACE_EVENT(svcrdma_post_send,
 	TP_PROTO(
-		const struct ib_send_wr *wr,
-		int status
+		const struct ib_send_wr *wr
 	),
 
-	TP_ARGS(wr, status),
+	TP_ARGS(wr),
 
 	TP_STRUCT__entry(
 		__field(const void *, cqe)
 		__field(unsigned int, num_sge)
 		__field(u32, inv_rkey)
-		__field(int, status)
 	),
 
 	TP_fast_assign(
@@ -1340,12 +1338,11 @@ TRACE_EVENT(svcrdma_post_send,
 		__entry->num_sge = wr->num_sge;
 		__entry->inv_rkey = (wr->opcode == IB_WR_SEND_WITH_INV) ?
 					wr->ex.invalidate_rkey : 0;
-		__entry->status = status;
 	),
 
-	TP_printk("cqe=%p num_sge=%u inv_rkey=0x%08x status=%d",
+	TP_printk("cqe=%p num_sge=%u inv_rkey=0x%08x",
 		__entry->cqe, __entry->num_sge,
-		__entry->inv_rkey, __entry->status
+		__entry->inv_rkey
 	)
 );
 
@@ -1410,26 +1407,23 @@ TRACE_EVENT(svcrdma_wc_receive,
 TRACE_EVENT(svcrdma_post_rw,
 	TP_PROTO(
 		const void *cqe,
-		int sqecount,
-		int status
+		int sqecount
 	),
 
-	TP_ARGS(cqe, sqecount, status),
+	TP_ARGS(cqe, sqecount),
 
 	TP_STRUCT__entry(
 		__field(const void *, cqe)
 		__field(int, sqecount)
-		__field(int, status)
 	),
 
 	TP_fast_assign(
 		__entry->cqe = cqe;
 		__entry->sqecount = sqecount;
-		__entry->status = status;
 	),
 
-	TP_printk("cqe=%p sqecount=%d status=%d",
-		__entry->cqe, __entry->sqecount, __entry->status
+	TP_printk("cqe=%p sqecount=%d",
+		__entry->cqe, __entry->sqecount
 	)
 );
 
@@ -1525,6 +1519,34 @@ DECLARE_EVENT_CLASS(svcrdma_sendqueue_ev
 DEFINE_SQ_EVENT(full);
 DEFINE_SQ_EVENT(retry);
 
+TRACE_EVENT(svcrdma_sq_post_err,
+	TP_PROTO(
+		const struct svcxprt_rdma *rdma,
+		int status
+	),
+
+	TP_ARGS(rdma, status),
+
+	TP_STRUCT__entry(
+		__field(int, avail)
+		__field(int, depth)
+		__field(int, status)
+		__string(addr, rdma->sc_xprt.xpt_remotebuf)
+	),
+
+	TP_fast_assign(
+		__entry->avail = atomic_read(&rdma->sc_sq_avail);
+		__entry->depth = rdma->sc_sq_depth;
+		__entry->status = status;
+		__assign_str(addr, rdma->sc_xprt.xpt_remotebuf);
+	),
+
+	TP_printk("addr=%s sc_sq_avail=%d/%d status=%d",
+		__get_str(addr), __entry->avail, __entry->depth,
+		__entry->status
+	)
+);
+
 #endif /* _TRACE_RPCRDMA_H */
 
 #include <trace/define_trace.h>
--- a/net/sunrpc/xprtrdma/svc_rdma_rw.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_rw.c
@@ -331,8 +331,6 @@ static int svc_rdma_post_chunk_ctxt(stru
 		if (atomic_sub_return(cc->cc_sqecount,
 				      &rdma->sc_sq_avail) > 0) {
 			ret = ib_post_send(rdma->sc_qp, first_wr, &bad_wr);
-			trace_svcrdma_post_rw(&cc->cc_cqe,
-					      cc->cc_sqecount, ret);
 			if (ret)
 				break;
 			return 0;
@@ -345,6 +343,7 @@ static int svc_rdma_post_chunk_ctxt(stru
 		trace_svcrdma_sq_retry(rdma);
 	} while (1);
 
+	trace_svcrdma_sq_post_err(rdma, ret);
 	set_bit(XPT_CLOSE, &xprt->xpt_flags);
 
 	/* If even one was posted, there will be a completion. */
--- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
@@ -310,15 +310,17 @@ int svc_rdma_send(struct svcxprt_rdma *r
 		}
 
 		svc_xprt_get(&rdma->sc_xprt);
+		trace_svcrdma_post_send(wr);
 		ret = ib_post_send(rdma->sc_qp, wr, NULL);
-		trace_svcrdma_post_send(wr, ret);
-		if (ret) {
-			set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags);
-			svc_xprt_put(&rdma->sc_xprt);
-			wake_up(&rdma->sc_send_wait);
-		}
-		break;
+		if (ret)
+			break;
+		return 0;
 	}
+
+	trace_svcrdma_sq_post_err(rdma, ret);
+	set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags);
+	svc_xprt_put(&rdma->sc_xprt);
+	wake_up(&rdma->sc_send_wait);
 	return ret;
 }
 

[PATCH 4.19 17/46] svcrdma: Fix leak of svc_rdma_recv_ctxt objects

[Greg Kroah-Hartman]

From: Chuck Lever <chuck.lever@oracle.com>

commit 23cf1ee1f1869966b75518c59b5cbda4c6c92450 upstream.

Utilize the xpo_release_rqst transport method to ensure that each
rqstp's svc_rdma_recv_ctxt object is released even when the server
cannot return a Reply for that rqstp.

Without this fix, each RPC whose Reply cannot be sent leaks one
svc_rdma_recv_ctxt. This is a 2.5KB structure, a 4KB DMA-mapped
Receive buffer, and any pages that might be part of the Reply
message.

The leak is infrequent unless the network fabric is unreliable or
Kerberos is in use, as GSS sequence window overruns, which result
in connection loss, are more common on fast transports.

Fixes: 3a88092ee319 ("svcrdma: Preserve Receive buffer until svc_rdma_sendto")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 include/linux/sunrpc/svc_rdma.h          |    1 +
 net/sunrpc/svc_xprt.c                    |    3 ---
 net/sunrpc/svcsock.c                     |    4 ++++
 net/sunrpc/xprtrdma/svc_rdma_recvfrom.c  |   22 ++++++++++++++++++++++
 net/sunrpc/xprtrdma/svc_rdma_sendto.c    |   13 +++----------
 net/sunrpc/xprtrdma/svc_rdma_transport.c |    5 -----
 6 files changed, 30 insertions(+), 18 deletions(-)

--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -159,6 +159,7 @@ extern bool svc_rdma_post_recvs(struct s
 extern void svc_rdma_recv_ctxt_put(struct svcxprt_rdma *rdma,
 				   struct svc_rdma_recv_ctxt *ctxt);
 extern void svc_rdma_flush_recv_queues(struct svcxprt_rdma *rdma);
+extern void svc_rdma_release_rqst(struct svc_rqst *rqstp);
 extern int svc_rdma_recvfrom(struct svc_rqst *);
 
 /* svc_rdma_rw.c */
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -878,9 +878,6 @@ int svc_send(struct svc_rqst *rqstp)
 	if (!xprt)
 		goto out;
 
-	/* release the receive skb before sending the reply */
-	xprt->xpt_ops->xpo_release_rqst(rqstp);
-
 	/* calculate over-all length */
 	xb = &rqstp->rq_res;
 	xb->len = xb->head[0].iov_len +
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -636,6 +636,8 @@ svc_udp_sendto(struct svc_rqst *rqstp)
 {
 	int		error;
 
+	svc_release_udp_skb(rqstp);
+
 	error = svc_sendto(rqstp, &rqstp->rq_res);
 	if (error == -ECONNREFUSED)
 		/* ICMP error on earlier request. */
@@ -1173,6 +1175,8 @@ static int svc_tcp_sendto(struct svc_rqs
 	int sent;
 	__be32 reclen;
 
+	svc_release_skb(rqstp);
+
 	/* Set up the first element of the reply kvec.
 	 * Any other kvecs that may be in use have been taken
 	 * care of by the server implementation itself.
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -226,6 +226,26 @@ void svc_rdma_recv_ctxt_put(struct svcxp
 		svc_rdma_recv_ctxt_destroy(rdma, ctxt);
 }
 
+/**
+ * svc_rdma_release_rqst - Release transport-specific per-rqst resources
+ * @rqstp: svc_rqst being released
+ *
+ * Ensure that the recv_ctxt is released whether or not a Reply
+ * was sent. For example, the client could close the connection,
+ * or svc_process could drop an RPC, before the Reply is sent.
+ */
+void svc_rdma_release_rqst(struct svc_rqst *rqstp)
+{
+	struct svc_rdma_recv_ctxt *ctxt = rqstp->rq_xprt_ctxt;
+	struct svc_xprt *xprt = rqstp->rq_xprt;
+	struct svcxprt_rdma *rdma =
+		container_of(xprt, struct svcxprt_rdma, sc_xprt);
+
+	rqstp->rq_xprt_ctxt = NULL;
+	if (ctxt)
+		svc_rdma_recv_ctxt_put(rdma, ctxt);
+}
+
 static int __svc_rdma_post_recv(struct svcxprt_rdma *rdma,
 				struct svc_rdma_recv_ctxt *ctxt)
 {
@@ -704,6 +724,8 @@ int svc_rdma_recvfrom(struct svc_rqst *r
 	__be32 *p;
 	int ret;
 
+	rqstp->rq_xprt_ctxt = NULL;
+
 	spin_lock(&rdma_xprt->sc_rq_dto_lock);
 	ctxt = svc_rdma_next_recv_ctxt(&rdma_xprt->sc_read_complete_q);
 	if (ctxt) {
--- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
@@ -908,12 +908,7 @@ int svc_rdma_sendto(struct svc_rqst *rqs
 				      wr_lst, rp_ch);
 	if (ret < 0)
 		goto err1;
-	ret = 0;
-
-out:
-	rqstp->rq_xprt_ctxt = NULL;
-	svc_rdma_recv_ctxt_put(rdma, rctxt);
-	return ret;
+	return 0;
 
  err2:
 	if (ret != -E2BIG && ret != -EINVAL)
@@ -922,14 +917,12 @@ out:
 	ret = svc_rdma_send_error_msg(rdma, sctxt, rqstp);
 	if (ret < 0)
 		goto err1;
-	ret = 0;
-	goto out;
+	return 0;
 
  err1:
 	svc_rdma_send_ctxt_put(rdma, sctxt);
  err0:
 	trace_svcrdma_send_failed(rqstp, ret);
 	set_bit(XPT_CLOSE, &xprt->xpt_flags);
-	ret = -ENOTCONN;
-	goto out;
+	return -ENOTCONN;
 }
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -71,7 +71,6 @@ static struct svc_xprt *svc_rdma_create(
 					struct sockaddr *sa, int salen,
 					int flags);
 static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt);
-static void svc_rdma_release_rqst(struct svc_rqst *);
 static void svc_rdma_detach(struct svc_xprt *xprt);
 static void svc_rdma_free(struct svc_xprt *xprt);
 static int svc_rdma_has_wspace(struct svc_xprt *xprt);
@@ -616,10 +615,6 @@ static struct svc_xprt *svc_rdma_accept(
 	return NULL;
 }
 
-static void svc_rdma_release_rqst(struct svc_rqst *rqstp)
-{
-}
-
 /*
  * When connected, an svc_xprt has at least two references:
  *

[PATCH 4.19 18/46] PCI: Avoid ASMedia XHCI USB PME# from D0 defect

[Greg Kroah-Hartman]

From: Kai-Heng Feng <kai.heng.feng@canonical.com>

commit 2880325bda8d53566dcb9725abc929eec871608e upstream.

The ASMedia USB XHCI Controller claims to support generating PME# while
in D0:

  01:00.0 USB controller: ASMedia Technology Inc. Device 2142 (prog-if 30 [XHCI])
    Subsystem: SUNIX Co., Ltd. Device 312b
    Capabilities: [78] Power Management version 3
      Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot-,D3cold-)
      Status: D0 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME-

However PME# only gets asserted when plugging USB 2.0 or USB 1.1 devices,
but not for USB 3.0 devices.

Remove PCI_PM_CAP_PME_D0 to avoid using PME under D0.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=205919
Link: https://lore.kernel.org/r/20191219192006.16270-1-kai.heng.feng@canonical.com
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/pci/quirks.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5282,3 +5282,14 @@ out_disable:
 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, 0x13b1,
 			      PCI_CLASS_DISPLAY_VGA, 8,
 			      quirk_reset_lenovo_thinkpad_p50_nvgpu);
+
+/*
+ * Device [1b21:2142]
+ * When in D0, PME# doesn't get asserted when plugging USB 3.0 device.
+ */
+static void pci_fixup_no_d0_pme(struct pci_dev *dev)
+{
+	pci_info(dev, "PME# does not work under D0, disabling it\n");
+	dev->pme_support &= ~(PCI_PM_CAP_PME_D0 >> PCI_PM_CAP_PME_SHIFT);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASMEDIA, 0x2142, pci_fixup_no_d0_pme);

[PATCH 4.19 19/46] PCI: Move Apex Edge TPU class quirk to fix BAR assignment

[Greg Kroah-Hartman]

From: Bjorn Helgaas <bhelgaas@google.com>

commit 0a8f41023e8a3c100b3dc458ed2da651bf961ead upstream.

Some Google Apex Edge TPU devices have a class code of 0
(PCI_CLASS_NOT_DEFINED).  This prevents the PCI core from assigning
resources for the Apex BARs because __dev_sort_resources() ignores
classless devices, host bridges, and IOAPICs.

On x86, firmware typically assigns those resources, so this was not a
problem.  But on some architectures, firmware does *not* assign BARs, and
since the PCI core didn't do it either, the Apex device didn't work
correctly:

  apex 0000:01:00.0: can't enable device: BAR 0 [mem 0x00000000-0x00003fff 64bit pref] not claimed
  apex 0000:01:00.0: error enabling PCI device

f390d08d8b87 ("staging: gasket: apex: fixup undefined PCI class") added a
quirk to fix the class code, but it was in the apex driver, and if the
driver was built as a module, it was too late to help.

Move the quirk to the PCI core, where it will always run early enough that
the PCI core will assign resources if necessary.

Link: https://lore.kernel.org/r/CAEzXK1r0Er039iERnc2KJ4jn7ySNUOG9H=Ha8TD8XroVqiZjgg@mail.gmail.com
Fixes: f390d08d8b87 ("staging: gasket: apex: fixup undefined PCI class")
Reported-by: Luís Mendes <luis.p.mendes@gmail.com>
Debugged-by: Luís Mendes <luis.p.mendes@gmail.com>
Tested-by: Luis Mendes <luis.p.mendes@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/pci/quirks.c                 |    7 +++++++
 drivers/staging/gasket/apex_driver.c |    7 -------
 2 files changed, 7 insertions(+), 7 deletions(-)

--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5293,3 +5293,10 @@ static void pci_fixup_no_d0_pme(struct p
 	dev->pme_support &= ~(PCI_PM_CAP_PME_D0 >> PCI_PM_CAP_PME_SHIFT);
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASMEDIA, 0x2142, pci_fixup_no_d0_pme);
+
+static void apex_pci_fixup_class(struct pci_dev *pdev)
+{
+	pdev->class = (PCI_CLASS_SYSTEM_OTHER << 8) | pdev->class;
+}
+DECLARE_PCI_FIXUP_CLASS_HEADER(0x1ac1, 0x089a,
+			       PCI_CLASS_NOT_DEFINED, 8, apex_pci_fixup_class);
--- a/drivers/staging/gasket/apex_driver.c
+++ b/drivers/staging/gasket/apex_driver.c
@@ -578,13 +578,6 @@ static const struct pci_device_id apex_p
 	{ PCI_DEVICE(APEX_PCI_VENDOR_ID, APEX_PCI_DEVICE_ID) }, { 0 }
 };
 
-static void apex_pci_fixup_class(struct pci_dev *pdev)
-{
-	pdev->class = (PCI_CLASS_SYSTEM_OTHER << 8) | pdev->class;
-}
-DECLARE_PCI_FIXUP_CLASS_HEADER(APEX_PCI_VENDOR_ID, APEX_PCI_DEVICE_ID,
-			       PCI_CLASS_NOT_DEFINED, 8, apex_pci_fixup_class);
-
 static int apex_pci_probe(struct pci_dev *pci_dev,
 			  const struct pci_device_id *id)
 {

[PATCH 4.19 20/46] ARM: dts: bcm283x: Disable dsi0 node

[Greg Kroah-Hartman]

From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>

commit 90444b958461a5f8fc299ece0fe17eab15cba1e1 upstream.

Since its inception the module was meant to be disabled by default, but
the original commit failed to add the relevant property.

Fixes: 4aba4cf82054 ("ARM: dts: bcm2835: Add the DSI module nodes and clocks")
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arm/boot/dts/bcm283x.dtsi |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/arm/boot/dts/bcm283x.dtsi
+++ b/arch/arm/boot/dts/bcm283x.dtsi
@@ -476,6 +476,7 @@
 					     "dsi0_ddr2",
 					     "dsi0_ddr";
 
+			status = "disabled";
 		};
 
 		thermal: thermal@7e212000 {

[PATCH 4.19 21/46] cpumap: Avoid warning when CONFIG_DEBUG_PER_CPU_MAPS is enabled

[Greg Kroah-Hartman]

From: Toke Høiland-Jørgensen <toke@redhat.com>

commit bc23d0e3f717ced21fbfacab3ab887d55e5ba367 upstream.

When the kernel is built with CONFIG_DEBUG_PER_CPU_MAPS, the cpumap code
can trigger a spurious warning if CONFIG_CPUMASK_OFFSTACK is also set. This
happens because in this configuration, NR_CPUS can be larger than
nr_cpumask_bits, so the initial check in cpu_map_alloc() is not sufficient
to guard against hitting the warning in cpumask_check().

Fix this by explicitly checking the supplied key against the
nr_cpumask_bits variable before calling cpu_possible().

Fixes: 6710e1126934 ("bpf: introduce new bpf cpu map type BPF_MAP_TYPE_CPUMAP")
Reported-by: Xiumei Mu <xmu@redhat.com>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Xiumei Mu <xmu@redhat.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200416083120.453718-1-toke@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 kernel/bpf/cpumap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/bpf/cpumap.c
+++ b/kernel/bpf/cpumap.c
@@ -455,7 +455,7 @@ static int cpu_map_update_elem(struct bp
 		return -EOVERFLOW;
 
 	/* Make sure CPU is a valid possible cpu */
-	if (!cpu_possible(key_cpu))
+	if (key_cpu >= nr_cpumask_bits || !cpu_possible(key_cpu))
 		return -ENODEV;
 
 	if (qsize == 0) {

[PATCH 4.19 22/46] net/mlx5: Fix failing fw tracer allocation on s390

[Greg Kroah-Hartman]

From: Niklas Schnelle <schnelle@linux.ibm.com>

commit a019b36123aec9700b21ae0724710f62928a8bc1 upstream.

On s390 FORCE_MAX_ZONEORDER is 9 instead of 11, thus a larger kzalloc()
allocation as done for the firmware tracer will always fail.

Looking at mlx5_fw_tracer_save_trace(), it is actually the driver itself
that copies the debug data into the trace array and there is no need for
the allocation to be contiguous in physical memory. We can therefor use
kvzalloc() instead of kzalloc() and get rid of the large contiguous
allcoation.

Fixes: f53aaa31cce7 ("net/mlx5: FW tracer, implement tracer logic")
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
@@ -796,7 +796,7 @@ struct mlx5_fw_tracer *mlx5_fw_tracer_cr
 		return NULL;
 	}
 
-	tracer = kzalloc(sizeof(*tracer), GFP_KERNEL);
+	tracer = kvzalloc(sizeof(*tracer), GFP_KERNEL);
 	if (!tracer)
 		return ERR_PTR(-ENOMEM);
 
@@ -842,7 +842,7 @@ destroy_workqueue:
 	tracer->dev = NULL;
 	destroy_workqueue(tracer->work_queue);
 free_tracer:
-	kfree(tracer);
+	kvfree(tracer);
 	return ERR_PTR(err);
 }
 
@@ -919,7 +919,7 @@ void mlx5_fw_tracer_destroy(struct mlx5_
 	mlx5_fw_tracer_destroy_log_buf(tracer);
 	flush_workqueue(tracer->work_queue);
 	destroy_workqueue(tracer->work_queue);
-	kfree(tracer);
+	kvfree(tracer);
 }
 
 void mlx5_fw_tracer_event(struct mlx5_core_dev *dev, struct mlx5_eqe *eqe)

[PATCH 4.19 23/46] perf/core: fix parent pid/tid in task exit events

[Greg Kroah-Hartman]

From: Ian Rogers <irogers@google.com>

commit f3bed55e850926614b9898fe982f66d2541a36a5 upstream.

Current logic yields the child task as the parent.

Before:
$ perf record bash -c "perf list > /dev/null"
$ perf script -D |grep 'FORK\|EXIT'
4387036190981094 0x5a70 [0x30]: PERF_RECORD_FORK(10472:10472):(10470:10470)
4387036606207580 0xf050 [0x30]: PERF_RECORD_EXIT(10472:10472):(10472:10472)
4387036607103839 0x17150 [0x30]: PERF_RECORD_EXIT(10470:10470):(10470:10470)
                                                   ^
  Note the repeated values here -------------------/

After:
383281514043 0x9d8 [0x30]: PERF_RECORD_FORK(2268:2268):(2266:2266)
383442003996 0x2180 [0x30]: PERF_RECORD_EXIT(2268:2268):(2266:2266)
383451297778 0xb70 [0x30]: PERF_RECORD_EXIT(2266:2266):(2265:2265)

Fixes: 94d5d1b2d891 ("perf_counter: Report the cloning task as parent on perf_counter_fork()")
Reported-by: KP Singh <kpsingh@google.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200417182842.12522-1-irogers@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 kernel/events/core.c |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6923,10 +6923,17 @@ static void perf_event_task_output(struc
 		goto out;
 
 	task_event->event_id.pid = perf_event_pid(event, task);
-	task_event->event_id.ppid = perf_event_pid(event, current);
-
 	task_event->event_id.tid = perf_event_tid(event, task);
-	task_event->event_id.ptid = perf_event_tid(event, current);
+
+	if (task_event->event_id.header.type == PERF_RECORD_EXIT) {
+		task_event->event_id.ppid = perf_event_pid(event,
+							task->real_parent);
+		task_event->event_id.ptid = perf_event_pid(event,
+							task->real_parent);
+	} else {  /* PERF_RECORD_FORK */
+		task_event->event_id.ppid = perf_event_pid(event, current);
+		task_event->event_id.ptid = perf_event_tid(event, current);
+	}
 
 	task_event->event_id.time = perf_event_clock(event);
 

[PATCH 4.19 24/46] bpf, x86_32: Fix incorrect encoding in BPF_LDX zero-extension

[Greg Kroah-Hartman]

From: Luke Nelson <lukenels@cs.washington.edu>

commit 5fa9a98fb10380e48a398998cd36a85e4ef711d6 upstream.

The current JIT uses the following sequence to zero-extend into the
upper 32 bits of the destination register for BPF_LDX BPF_{B,H,W},
when the destination register is not on the stack:

  EMIT3(0xC7, add_1reg(0xC0, dst_hi), 0);

The problem is that C7 /0 encodes a MOV instruction that requires a 4-byte
immediate; the current code emits only 1 byte of the immediate. This
means that the first 3 bytes of the next instruction will be treated as
the rest of the immediate, breaking the stream of instructions.

This patch fixes the problem by instead emitting "xor dst_hi,dst_hi"
to clear the upper 32 bits. This fixes the problem and is more efficient
than using MOV to load a zero immediate.

This bug may not be currently triggerable as BPF_REG_AX is the only
register not stored on the stack and the verifier uses it in a limited
way, and the verifier implements a zero-extension optimization. But the
JIT should avoid emitting incorrect encodings regardless.

Fixes: 03f5781be2c7b ("bpf, x86_32: add eBPF JIT compiler for ia32")
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Luke Nelson <luke.r.nels@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Acked-by: Wang YanQing <udknight@gmail.com>
Link: https://lore.kernel.org/bpf/20200422173630.8351-1-luke.r.nels@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/net/bpf_jit_comp32.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/arch/x86/net/bpf_jit_comp32.c
+++ b/arch/x86/net/bpf_jit_comp32.c
@@ -1830,7 +1830,9 @@ static int do_jit(struct bpf_prog *bpf_p
 					      STACK_VAR(dst_hi));
 					EMIT(0x0, 4);
 				} else {
-					EMIT3(0xC7, add_1reg(0xC0, dst_hi), 0);
+					/* xor dst_hi,dst_hi */
+					EMIT2(0x33,
+					      add_2reg(0xC0, dst_hi, dst_hi));
 				}
 				break;
 			case BPF_DW:

[PATCH 4.19 25/46] mm: shmem: disable interrupt when acquiring info->lock in userfaultfd_copy path

[Greg Kroah-Hartman]

From: Yang Shi <yang.shi@linux.alibaba.com>

commit 94b7cc01da5a3cc4f3da5e0ff492ef008bb555d6 upstream.

Syzbot reported the below lockdep splat:

    WARNING: possible irq lock inversion dependency detected
    5.6.0-rc7-syzkaller #0 Not tainted
    --------------------------------------------------------
    syz-executor.0/10317 just changed the state of lock:
    ffff888021d16568 (&(&info->lock)->rlock){+.+.}, at: spin_lock include/linux/spinlock.h:338 [inline]
    ffff888021d16568 (&(&info->lock)->rlock){+.+.}, at: shmem_mfill_atomic_pte+0x1012/0x21c0 mm/shmem.c:2407
    but this lock was taken by another, SOFTIRQ-safe lock in the past:
     (&(&xa->xa_lock)->rlock#5){..-.}

    and interrupts could create inverse lock ordering between them.

    other info that might help us debug this:
     Possible interrupt unsafe locking scenario:

           CPU0                    CPU1
           ----                    ----
      lock(&(&info->lock)->rlock);
                                   local_irq_disable();
                                   lock(&(&xa->xa_lock)->rlock#5);
                                   lock(&(&info->lock)->rlock);
      <Interrupt>
        lock(&(&xa->xa_lock)->rlock#5);

     *** DEADLOCK ***

The full report is quite lengthy, please see:

  https://lore.kernel.org/linux-mm/alpine.LSU.2.11.2004152007370.13597@eggly.anvils/T/#m813b412c5f78e25ca8c6c7734886ed4de43f241d

It is because CPU 0 held info->lock with IRQ enabled in userfaultfd_copy
path, then CPU 1 is splitting a THP which held xa_lock and info->lock in
IRQ disabled context at the same time.  If softirq comes in to acquire
xa_lock, the deadlock would be triggered.

The fix is to acquire/release info->lock with *_irq version instead of
plain spin_{lock,unlock} to make it softirq safe.

Fixes: 4c27fe4c4c84 ("userfaultfd: shmem: add shmem_mcopy_atomic_pte for userfaultfd support")
Reported-by: syzbot+e27980339d305f2dbfd9@syzkaller.appspotmail.com
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: syzbot+e27980339d305f2dbfd9@syzkaller.appspotmail.com
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Link: http://lkml.kernel.org/r/1587061357-122619-1-git-send-email-yang.shi@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 mm/shmem.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2350,11 +2350,11 @@ static int shmem_mfill_atomic_pte(struct
 
 	lru_cache_add_anon(page);
 
-	spin_lock(&info->lock);
+	spin_lock_irq(&info->lock);
 	info->alloced++;
 	inode->i_blocks += BLOCKS_PER_PAGE;
 	shmem_recalc_inode(inode);
-	spin_unlock(&info->lock);
+	spin_unlock_irq(&info->lock);
 
 	inc_mm_counter(dst_mm, mm_counter_file(page));
 	page_add_file_rmap(page, false);

[PATCH 4.19 26/46] xfs: clear PF_MEMALLOC before exiting xfsaild thread

[Greg Kroah-Hartman]

From: Eric Biggers <ebiggers@google.com>

commit 10a98cb16d80be3595fdb165fad898bb28b8b6d2 upstream.

Leaving PF_MEMALLOC set when exiting a kthread causes it to remain set
during do_exit().  That can confuse things.  In particular, if BSD
process accounting is enabled, then do_exit() writes data to an
accounting file.  If that file has FS_SYNC_FL set, then this write
occurs synchronously and can misbehave if PF_MEMALLOC is set.

For example, if the accounting file is located on an XFS filesystem,
then a WARN_ON_ONCE() in iomap_do_writepage() is triggered and the data
doesn't get written when it should.  Or if the accounting file is
located on an ext4 filesystem without a journal, then a WARN_ON_ONCE()
in ext4_write_inode() is triggered and the inode doesn't get written.

Fix this in xfsaild() by using the helper functions to save and restore
PF_MEMALLOC.

This can be reproduced as follows in the kvm-xfstests test appliance
modified to add the 'acct' Debian package, and with kvm-xfstests's
recommended kconfig modified to add CONFIG_BSD_PROCESS_ACCT=y:

        mkfs.xfs -f /dev/vdb
        mount /vdb
        touch /vdb/file
        chattr +S /vdb/file
        accton /vdb/file
        mkfs.xfs -f /dev/vdc
        mount /vdc
        umount /vdc

It causes:
	WARNING: CPU: 1 PID: 336 at fs/iomap/buffered-io.c:1534
	CPU: 1 PID: 336 Comm: xfsaild/vdc Not tainted 5.6.0-rc5 #3
	Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20191223_100556-anatol 04/01/2014
	RIP: 0010:iomap_do_writepage+0x16b/0x1f0 fs/iomap/buffered-io.c:1534
	[...]
	Call Trace:
	 write_cache_pages+0x189/0x4d0 mm/page-writeback.c:2238
	 iomap_writepages+0x1c/0x33 fs/iomap/buffered-io.c:1642
	 xfs_vm_writepages+0x65/0x90 fs/xfs/xfs_aops.c:578
	 do_writepages+0x41/0xe0 mm/page-writeback.c:2344
	 __filemap_fdatawrite_range+0xd2/0x120 mm/filemap.c:421
	 file_write_and_wait_range+0x71/0xc0 mm/filemap.c:760
	 xfs_file_fsync+0x7a/0x2b0 fs/xfs/xfs_file.c:114
	 generic_write_sync include/linux/fs.h:2867 [inline]
	 xfs_file_buffered_aio_write+0x379/0x3b0 fs/xfs/xfs_file.c:691
	 call_write_iter include/linux/fs.h:1901 [inline]
	 new_sync_write+0x130/0x1d0 fs/read_write.c:483
	 __kernel_write+0x54/0xe0 fs/read_write.c:515
	 do_acct_process+0x122/0x170 kernel/acct.c:522
	 slow_acct_process kernel/acct.c:581 [inline]
	 acct_process+0x1d4/0x27c kernel/acct.c:607
	 do_exit+0x83d/0xbc0 kernel/exit.c:791
	 kthread+0xf1/0x140 kernel/kthread.c:257
	 ret_from_fork+0x27/0x50 arch/x86/entry/entry_64.S:352

This bug was originally reported by syzbot at
https://lore.kernel.org/r/0000000000000e7156059f751d7b@google.com.

Reported-by: syzbot+1f9dc49e8de2582d90c2@syzkaller.appspotmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/xfs/xfs_trans_ail.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -520,8 +520,9 @@ xfsaild(
 {
 	struct xfs_ail	*ailp = data;
 	long		tout = 0;	/* milliseconds */
+	unsigned int	noreclaim_flag;
 
-	current->flags |= PF_MEMALLOC;
+	noreclaim_flag = memalloc_noreclaim_save();
 	set_freezable();
 
 	while (1) {
@@ -592,6 +593,7 @@ xfsaild(
 		tout = xfsaild_push(ailp);
 	}
 
+	memalloc_noreclaim_restore(noreclaim_flag);
 	return 0;
 }
 

[PATCH 4.19 27/46] bpf, x86: Fix encoding for lower 8-bit registers in BPF_STX BPF_B

[Greg Kroah-Hartman]

From: Luke Nelson <lukenels@cs.washington.edu>

[ Upstream commit aee194b14dd2b2bde6252b3acf57d36dccfc743a ]

This patch fixes an encoding bug in emit_stx for BPF_B when the source
register is BPF_REG_FP.

The current implementation for BPF_STX BPF_B in emit_stx saves one REX
byte when the operands can be encoded using Mod-R/M alone. The lower 8
bits of registers %rax, %rbx, %rcx, and %rdx can be accessed without using
a REX prefix via %al, %bl, %cl, and %dl, respectively. Other registers,
(e.g., %rsi, %rdi, %rbp, %rsp) require a REX prefix to use their 8-bit
equivalents (%sil, %dil, %bpl, %spl).

The current code checks if the source for BPF_STX BPF_B is BPF_REG_1
or BPF_REG_2 (which map to %rdi and %rsi), in which case it emits the
required REX prefix. However, it misses the case when the source is
BPF_REG_FP (mapped to %rbp).

The result is that BPF_STX BPF_B with BPF_REG_FP as the source operand
will read from register %ch instead of the correct %bpl. This patch fixes
the problem by fixing and refactoring the check on which registers need
the extra REX byte. Since no BPF registers map to %rsp, there is no need
to handle %spl.

Fixes: 622582786c9e0 ("net: filter: x86: internal BPF JIT")
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Luke Nelson <luke.r.nels@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200418232655.23870-1-luke.r.nels@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/net/bpf_jit_comp.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c
index a32fc3d994076..46ab928312517 100644
--- a/arch/x86/net/bpf_jit_comp.c
+++ b/arch/x86/net/bpf_jit_comp.c
@@ -142,6 +142,19 @@ static bool is_ereg(u32 reg)
 			     BIT(BPF_REG_AX));
 }
 
+/*
+ * is_ereg_8l() == true if BPF register 'reg' is mapped to access x86-64
+ * lower 8-bit registers dil,sil,bpl,spl,r8b..r15b, which need extra byte
+ * of encoding. al,cl,dl,bl have simpler encoding.
+ */
+static bool is_ereg_8l(u32 reg)
+{
+	return is_ereg(reg) ||
+	    (1 << reg) & (BIT(BPF_REG_1) |
+			  BIT(BPF_REG_2) |
+			  BIT(BPF_REG_FP));
+}
+
 static bool is_axreg(u32 reg)
 {
 	return reg == BPF_REG_0;
@@ -751,9 +764,8 @@ st:			if (is_imm8(insn->off))
 			/* STX: *(u8*)(dst_reg + off) = src_reg */
 		case BPF_STX | BPF_MEM | BPF_B:
 			/* Emit 'mov byte ptr [rax + off], al' */
-			if (is_ereg(dst_reg) || is_ereg(src_reg) ||
-			    /* We have to add extra byte for x86 SIL, DIL regs */
-			    src_reg == BPF_REG_1 || src_reg == BPF_REG_2)
+			if (is_ereg(dst_reg) || is_ereg_8l(src_reg))
+				/* Add extra byte for eregs or SIL,DIL,BPL in src_reg */
 				EMIT2(add_2mod(0x40, dst_reg, src_reg), 0x88);
 			else
 				EMIT1(0x88);
-- 
2.20.1

[PATCH 4.19 28/46] net: fec: set GPR bit on suspend by DT configuration.

[Greg Kroah-Hartman]

From: Martin Fuzzey <martin.fuzzey@flowbird.group>

[ Upstream commit da722186f6549d752ea5b5fbc18111833c81a133 ]

On some SoCs, such as the i.MX6, it is necessary to set a bit
in the SoC level GPR register before suspending for wake on lan
to work.

The fec platform callback sleep_mode_enable was intended to allow this
but the platform implementation was NAK'd back in 2015 [1]

This means that, currently, wake on lan is broken on mainline for
the i.MX6 at least.

So implement the required bit setting in the fec driver by itself
by adding a new optional DT property indicating the GPR register
and adding the offset and bit information to the driver.

[1] https://www.spinics.net/lists/netdev/msg310922.html

Signed-off-by: Martin Fuzzey <martin.fuzzey@flowbird.group>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/freescale/fec.h      |   7 +
 drivers/net/ethernet/freescale/fec_main.c | 149 +++++++++++++++++-----
 2 files changed, 127 insertions(+), 29 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index bf80855dd0dd4..d06a89e99872d 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -488,6 +488,12 @@ struct fec_enet_priv_rx_q {
 	struct  sk_buff *rx_skbuff[RX_RING_SIZE];
 };
 
+struct fec_stop_mode_gpr {
+	struct regmap *gpr;
+	u8 reg;
+	u8 bit;
+};
+
 /* The FEC buffer descriptors track the ring buffers.  The rx_bd_base and
  * tx_bd_base always point to the base of the buffer descriptors.  The
  * cur_rx and cur_tx point to the currently available buffer.
@@ -563,6 +569,7 @@ struct fec_enet_private {
 	int hwts_tx_en;
 	struct delayed_work time_keep;
 	struct regulator *reg_phy;
+	struct fec_stop_mode_gpr stop_gpr;
 
 	unsigned int tx_align;
 	unsigned int rx_align;
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 9142992ccd5a7..48c58f93b124b 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -62,6 +62,8 @@
 #include <linux/if_vlan.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/prefetch.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
 #include <soc/imx/cpuidle.h>
 
 #include <asm/cacheflush.h>
@@ -84,6 +86,56 @@ static void fec_enet_itr_coal_init(struct net_device *ndev);
 #define FEC_ENET_OPD_V	0xFFF0
 #define FEC_MDIO_PM_TIMEOUT  100 /* ms */
 
+struct fec_devinfo {
+	u32 quirks;
+	u8 stop_gpr_reg;
+	u8 stop_gpr_bit;
+};
+
+static const struct fec_devinfo fec_imx25_info = {
+	.quirks = FEC_QUIRK_USE_GASKET | FEC_QUIRK_MIB_CLEAR |
+		  FEC_QUIRK_HAS_FRREG,
+};
+
+static const struct fec_devinfo fec_imx27_info = {
+	.quirks = FEC_QUIRK_MIB_CLEAR | FEC_QUIRK_HAS_FRREG,
+};
+
+static const struct fec_devinfo fec_imx28_info = {
+	.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME |
+		  FEC_QUIRK_SINGLE_MDIO | FEC_QUIRK_HAS_RACC |
+		  FEC_QUIRK_HAS_FRREG,
+};
+
+static const struct fec_devinfo fec_imx6q_info = {
+	.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
+		  FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
+		  FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR006358 |
+		  FEC_QUIRK_HAS_RACC,
+	.stop_gpr_reg = 0x34,
+	.stop_gpr_bit = 27,
+};
+
+static const struct fec_devinfo fec_mvf600_info = {
+	.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_RACC,
+};
+
+static const struct fec_devinfo fec_imx6x_info = {
+	.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
+		  FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
+		  FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB |
+		  FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE |
+		  FEC_QUIRK_HAS_RACC | FEC_QUIRK_HAS_COALESCE,
+};
+
+static const struct fec_devinfo fec_imx6ul_info = {
+	.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
+		  FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
+		  FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR007885 |
+		  FEC_QUIRK_BUG_CAPTURE | FEC_QUIRK_HAS_RACC |
+		  FEC_QUIRK_HAS_COALESCE,
+};
+
 static struct platform_device_id fec_devtype[] = {
 	{
 		/* keep it for coldfire */
@@ -91,39 +143,25 @@ static struct platform_device_id fec_devtype[] = {
 		.driver_data = 0,
 	}, {
 		.name = "imx25-fec",
-		.driver_data = FEC_QUIRK_USE_GASKET | FEC_QUIRK_MIB_CLEAR |
-			       FEC_QUIRK_HAS_FRREG,
+		.driver_data = (kernel_ulong_t)&fec_imx25_info,
 	}, {
 		.name = "imx27-fec",
-		.driver_data = FEC_QUIRK_MIB_CLEAR | FEC_QUIRK_HAS_FRREG,
+		.driver_data = (kernel_ulong_t)&fec_imx27_info,
 	}, {
 		.name = "imx28-fec",
-		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME |
-				FEC_QUIRK_SINGLE_MDIO | FEC_QUIRK_HAS_RACC |
-				FEC_QUIRK_HAS_FRREG,
+		.driver_data = (kernel_ulong_t)&fec_imx28_info,
 	}, {
 		.name = "imx6q-fec",
-		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
-				FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
-				FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR006358 |
-				FEC_QUIRK_HAS_RACC,
+		.driver_data = (kernel_ulong_t)&fec_imx6q_info,
 	}, {
 		.name = "mvf600-fec",
-		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_RACC,
+		.driver_data = (kernel_ulong_t)&fec_mvf600_info,
 	}, {
 		.name = "imx6sx-fec",
-		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
-				FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
-				FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB |
-				FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE |
-				FEC_QUIRK_HAS_RACC | FEC_QUIRK_HAS_COALESCE,
+		.driver_data = (kernel_ulong_t)&fec_imx6x_info,
 	}, {
 		.name = "imx6ul-fec",
-		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
-				FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
-				FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR007885 |
-				FEC_QUIRK_BUG_CAPTURE | FEC_QUIRK_HAS_RACC |
-				FEC_QUIRK_HAS_COALESCE,
+		.driver_data = (kernel_ulong_t)&fec_imx6ul_info,
 	}, {
 		/* sentinel */
 	}
@@ -1089,11 +1127,28 @@ fec_restart(struct net_device *ndev)
 
 }
 
+static void fec_enet_stop_mode(struct fec_enet_private *fep, bool enabled)
+{
+	struct fec_platform_data *pdata = fep->pdev->dev.platform_data;
+	struct fec_stop_mode_gpr *stop_gpr = &fep->stop_gpr;
+
+	if (stop_gpr->gpr) {
+		if (enabled)
+			regmap_update_bits(stop_gpr->gpr, stop_gpr->reg,
+					   BIT(stop_gpr->bit),
+					   BIT(stop_gpr->bit));
+		else
+			regmap_update_bits(stop_gpr->gpr, stop_gpr->reg,
+					   BIT(stop_gpr->bit), 0);
+	} else if (pdata && pdata->sleep_mode_enable) {
+		pdata->sleep_mode_enable(enabled);
+	}
+}
+
 static void
 fec_stop(struct net_device *ndev)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct fec_platform_data *pdata = fep->pdev->dev.platform_data;
 	u32 rmii_mode = readl(fep->hwp + FEC_R_CNTRL) & (1 << 8);
 	u32 val;
 
@@ -1122,9 +1177,7 @@ fec_stop(struct net_device *ndev)
 		val = readl(fep->hwp + FEC_ECNTRL);
 		val |= (FEC_ECR_MAGICEN | FEC_ECR_SLEEP);
 		writel(val, fep->hwp + FEC_ECNTRL);
-
-		if (pdata && pdata->sleep_mode_enable)
-			pdata->sleep_mode_enable(true);
+		fec_enet_stop_mode(fep, true);
 	}
 	writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
 
@@ -3347,6 +3400,37 @@ static int fec_enet_get_irq_cnt(struct platform_device *pdev)
 	return irq_cnt;
 }
 
+static int fec_enet_init_stop_mode(struct fec_enet_private *fep,
+				   struct fec_devinfo *dev_info,
+				   struct device_node *np)
+{
+	struct device_node *gpr_np;
+	int ret = 0;
+
+	if (!dev_info)
+		return 0;
+
+	gpr_np = of_parse_phandle(np, "gpr", 0);
+	if (!gpr_np)
+		return 0;
+
+	fep->stop_gpr.gpr = syscon_node_to_regmap(gpr_np);
+	if (IS_ERR(fep->stop_gpr.gpr)) {
+		dev_err(&fep->pdev->dev, "could not find gpr regmap\n");
+		ret = PTR_ERR(fep->stop_gpr.gpr);
+		fep->stop_gpr.gpr = NULL;
+		goto out;
+	}
+
+	fep->stop_gpr.reg = dev_info->stop_gpr_reg;
+	fep->stop_gpr.bit = dev_info->stop_gpr_bit;
+
+out:
+	of_node_put(gpr_np);
+
+	return ret;
+}
+
 static int
 fec_probe(struct platform_device *pdev)
 {
@@ -3362,6 +3446,7 @@ fec_probe(struct platform_device *pdev)
 	int num_rx_qs;
 	char irq_name[8];
 	int irq_cnt;
+	struct fec_devinfo *dev_info;
 
 	fec_enet_get_queue_num(pdev, &num_tx_qs, &num_rx_qs);
 
@@ -3379,7 +3464,9 @@ fec_probe(struct platform_device *pdev)
 	of_id = of_match_device(fec_dt_ids, &pdev->dev);
 	if (of_id)
 		pdev->id_entry = of_id->data;
-	fep->quirks = pdev->id_entry->driver_data;
+	dev_info = (struct fec_devinfo *)pdev->id_entry->driver_data;
+	if (dev_info)
+		fep->quirks = dev_info->quirks;
 
 	fep->netdev = ndev;
 	fep->num_rx_queues = num_rx_qs;
@@ -3414,6 +3501,10 @@ fec_probe(struct platform_device *pdev)
 	if (of_get_property(np, "fsl,magic-packet", NULL))
 		fep->wol_flag |= FEC_WOL_HAS_MAGIC_PACKET;
 
+	ret = fec_enet_init_stop_mode(fep, dev_info, np);
+	if (ret)
+		goto failed_stop_mode;
+
 	phy_node = of_parse_phandle(np, "phy-handle", 0);
 	if (!phy_node && of_phy_is_fixed_link(np)) {
 		ret = of_phy_register_fixed_link(np);
@@ -3583,6 +3674,7 @@ failed_clk:
 	if (of_phy_is_fixed_link(np))
 		of_phy_deregister_fixed_link(np);
 	of_node_put(phy_node);
+failed_stop_mode:
 failed_phy:
 	dev_id--;
 failed_ioremap:
@@ -3660,7 +3752,6 @@ static int __maybe_unused fec_resume(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct fec_platform_data *pdata = fep->pdev->dev.platform_data;
 	int ret;
 	int val;
 
@@ -3678,8 +3769,8 @@ static int __maybe_unused fec_resume(struct device *dev)
 			goto failed_clk;
 		}
 		if (fep->wol_flag & FEC_WOL_FLAG_ENABLE) {
-			if (pdata && pdata->sleep_mode_enable)
-				pdata->sleep_mode_enable(false);
+			fec_enet_stop_mode(fep, false);
+
 			val = readl(fep->hwp + FEC_ECNTRL);
 			val &= ~(FEC_ECR_MAGICEN | FEC_ECR_SLEEP);
 			writel(val, fep->hwp + FEC_ECNTRL);
-- 
2.20.1

[PATCH 4.19 29/46] x86: hyperv: report value of misc_features

[Greg Kroah-Hartman]

From: Olaf Hering <olaf@aepfle.de>

[ Upstream commit 97d9f1c43bedd400301d6f1eff54d46e8c636e47 ]

A few kernel features depend on ms_hyperv.misc_features, but unlike its
siblings ->features and ->hints, the value was never reported during boot.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Link: https://lore.kernel.org/r/20200407172739.31371-1-olaf@aepfle.de
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/kernel/cpu/mshyperv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index fc93ae3255153..f8b0fa2dbe374 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -214,8 +214,8 @@ static void __init ms_hyperv_init_platform(void)
 	ms_hyperv.misc_features = cpuid_edx(HYPERV_CPUID_FEATURES);
 	ms_hyperv.hints    = cpuid_eax(HYPERV_CPUID_ENLIGHTMENT_INFO);
 
-	pr_info("Hyper-V: features 0x%x, hints 0x%x\n",
-		ms_hyperv.features, ms_hyperv.hints);
+	pr_info("Hyper-V: features 0x%x, hints 0x%x, misc 0x%x\n",
+		ms_hyperv.features, ms_hyperv.hints, ms_hyperv.misc_features);
 
 	ms_hyperv.max_vp_index = cpuid_eax(HYPERV_CPUID_IMPLEMENT_LIMITS);
 	ms_hyperv.max_lp_index = cpuid_ebx(HYPERV_CPUID_IMPLEMENT_LIMITS);
-- 
2.20.1

[PATCH 4.19 30/46] xfs: fix partially uninitialized structure in xfs_reflink_remap_extent

[Greg Kroah-Hartman]

From: Darrick J. Wong <darrick.wong@oracle.com>

[ Upstream commit c142932c29e533ee892f87b44d8abc5719edceec ]

In the reflink extent remap function, it turns out that uirec (the block
mapping corresponding only to the part of the passed-in mapping that got
unmapped) was not fully initialized.  Specifically, br_state was not
being copied from the passed-in struct to the uirec.  This could lead to
unpredictable results such as the reflinked mapping being marked
unwritten in the destination file.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/xfs/xfs_reflink.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
index f3c393f309e19..6622652a85a80 100644
--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -1058,6 +1058,7 @@ xfs_reflink_remap_extent(
 		uirec.br_startblock = irec->br_startblock + rlen;
 		uirec.br_startoff = irec->br_startoff + rlen;
 		uirec.br_blockcount = unmap_len - rlen;
+		uirec.br_state = irec->br_state;
 		unmap_len = rlen;
 
 		/* If this isn't a real mapping, we're done. */
-- 
2.20.1

[PATCH 4.19 31/46] ALSA: hda: Keep the controller initialization even if no codecs found

[Greg Kroah-Hartman]

From: Takashi Iwai <tiwai@suse.de>

[ Upstream commit 9479e75fca370a5220784f7596bf598c4dad0b9b ]

Currently, when the HD-audio controller driver doesn't detect any
codecs, it tries to abort the probe.  But this abort happens at the
delayed probe, i.e. the primary probe call already returned success,
hence the driver is never unbound until user does so explicitly.
As a result, it may leave the HD-audio device in the running state
without the runtime PM.  More badly, if the device is a HD-audio bus
that is tied with a GPU, GPU cannot reach to the full power down and
consumes unnecessarily much power.

This patch changes the logic after no-codec situation; it continues
probing without the further codec initialization but keep the
controller driver running normally.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207043
Tested-by: Roy Spliet <nouveau@spliet.org>
Link: https://lore.kernel.org/r/20200413082034.25166-5-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/pci/hda/hda_intel.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 0502042c16163..72c268e887e55 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2054,7 +2054,7 @@ static int azx_first_init(struct azx *chip)
 	/* codec detection */
 	if (!azx_bus(chip)->codec_mask) {
 		dev_err(card->dev, "no codecs found!\n");
-		return -ENODEV;
+		/* keep running the rest for the runtime PM */
 	}
 
 	if (azx_acquire_irq(chip, 0) < 0)
@@ -2440,9 +2440,11 @@ static int azx_probe_continue(struct azx *chip)
 #endif
 
 	/* create codec instances */
-	err = azx_probe_codecs(chip, azx_max_codecs[chip->driver_type]);
-	if (err < 0)
-		goto out_free;
+	if (bus->codec_mask) {
+		err = azx_probe_codecs(chip, azx_max_codecs[chip->driver_type]);
+		if (err < 0)
+			goto out_free;
+	}
 
 #ifdef CONFIG_SND_HDA_PATCH_LOADER
 	if (chip->fw) {
@@ -2456,7 +2458,7 @@ static int azx_probe_continue(struct azx *chip)
 #endif
 	}
 #endif
-	if ((probe_only[dev] & 1) == 0) {
+	if (bus->codec_mask && !(probe_only[dev] & 1)) {
 		err = azx_codec_configure(chip);
 		if (err < 0)
 			goto out_free;
-- 
2.20.1

[PATCH 4.19 32/46] ALSA: hda: Explicitly permit using autosuspend if runtime PM is supported

[Greg Kroah-Hartman]

From: Roy Spliet <nouveau@spliet.org>

[ Upstream commit 3ba21113bd33d49f3c300a23fc08cf114c434995 ]

This fixes runtime PM not working after a suspend-to-RAM cycle at least for
the codec-less HDA device found on NVIDIA GPUs.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207043
Signed-off-by: Roy Spliet <nouveau@spliet.org>
Link: https://lore.kernel.org/r/20200413082034.25166-7-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/pci/hda/hda_intel.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 72c268e887e55..ff448abb5449f 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2475,8 +2475,10 @@ static int azx_probe_continue(struct azx *chip)
 
 	set_default_power_save(chip);
 
-	if (azx_has_pm_runtime(chip))
+	if (azx_has_pm_runtime(chip)) {
+		pm_runtime_use_autosuspend(&pci->dev);
 		pm_runtime_put_autosuspend(&pci->dev);
+	}
 
 out_free:
 	if ((chip->driver_caps & AZX_DCAPS_I915_POWERWELL)
-- 
2.20.1

[PATCH 4.19 33/46] scsi: target: fix PR IN / READ FULL STATUS for FC

[Greg Kroah-Hartman]

From: Bodo Stroesser <bstroesser@ts.fujitsu.com>

[ Upstream commit 8fed04eb79a74cbf471dfaa755900a51b37273ab ]

Creation of the response to READ FULL STATUS fails for FC based
reservations. Reason is the too high loop limit (< 24) in
fc_get_pr_transport_id(). The string representation of FC WWPN is 23 chars
long only ("11:22:33:44:55:66:77:88"). So when i is 23, the loop body is
executed a last time for the ending '\0' of the string and thus hex2bin()
reports an error.

Link: https://lore.kernel.org/r/20200408132610.14623-3-bstroesser@ts.fujitsu.com
Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/target/target_core_fabric_lib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/target/target_core_fabric_lib.c b/drivers/target/target_core_fabric_lib.c
index 10fae26b44add..939c6212d2ac5 100644
--- a/drivers/target/target_core_fabric_lib.c
+++ b/drivers/target/target_core_fabric_lib.c
@@ -76,7 +76,7 @@ static int fc_get_pr_transport_id(
 	 * encoded TransportID.
 	 */
 	ptr = &se_nacl->initiatorname[0];
-	for (i = 0; i < 24; ) {
+	for (i = 0; i < 23; ) {
 		if (!strncmp(&ptr[i], ":", 1)) {
 			i++;
 			continue;
-- 
2.20.1

[PATCH 4.19 34/46] scsi: target: tcmu: reset_ring should reset TCMU_DEV_BIT_BROKEN

[Greg Kroah-Hartman]

From: Bodo Stroesser <bstroesser@ts.fujitsu.com>

[ Upstream commit 066f79a5fd6d1b9a5cc57b5cd445b3e4bb68a5b2 ]

In case command ring buffer becomes inconsistent, tcmu sets device flag
TCMU_DEV_BIT_BROKEN.  If the bit is set, tcmu rejects new commands from LIO
core with TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, and no longer processes
completions from the ring.  The reset_ring attribute can be used to
completely clean up the command ring, so after reset_ring the ring no
longer is inconsistent.

Therefore reset_ring also should reset bit TCMU_DEV_BIT_BROKEN to allow
normal processing.

Link: https://lore.kernel.org/r/20200409101026.17872-1-bstroesser@ts.fujitsu.com
Acked-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/target/target_core_user.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 7ee0a75ce4526..eff1e36ca03c2 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -2067,6 +2067,7 @@ static void tcmu_reset_ring(struct tcmu_dev *udev, u8 err_level)
 	mb->cmd_tail = 0;
 	mb->cmd_head = 0;
 	tcmu_flush_dcache_range(mb, sizeof(*mb));
+	clear_bit(TCMU_DEV_BIT_BROKEN, &udev->flags);
 
 	del_timer(&udev->cmd_timer);
 
-- 
2.20.1

[PATCH 4.19 35/46] objtool: Fix CONFIG_UBSAN_TRAP unreachable warnings

[Greg Kroah-Hartman]

From: Josh Poimboeuf <jpoimboe@redhat.com>

[ Upstream commit bd841d6154f5f41f8a32d3c1b0bc229e326e640a ]

CONFIG_UBSAN_TRAP causes GCC to emit a UD2 whenever it encounters an
unreachable code path.  This includes __builtin_unreachable().  Because
the BUG() macro uses __builtin_unreachable() after it emits its own UD2,
this results in a double UD2.  In this case objtool rightfully detects
that the second UD2 is unreachable:

  init/main.o: warning: objtool: repair_env_string()+0x1c8: unreachable instruction

We weren't able to figure out a way to get rid of the double UD2s, so
just silence the warning.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/6653ad73c6b59c049211bd7c11ed3809c20ee9f5.1585761021.git.jpoimboe@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/objtool/check.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 9479c74af9baf..4613d796492ab 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -2086,14 +2086,27 @@ static bool ignore_unreachable_insn(struct instruction *insn)
 	    !strcmp(insn->sec->name, ".altinstr_aux"))
 		return true;
 
+	if (!insn->func)
+		return false;
+
+	/*
+	 * CONFIG_UBSAN_TRAP inserts a UD2 when it sees
+	 * __builtin_unreachable().  The BUG() macro has an unreachable() after
+	 * the UD2, which causes GCC's undefined trap logic to emit another UD2
+	 * (or occasionally a JMP to UD2).
+	 */
+	if (list_prev_entry(insn, list)->dead_end &&
+	    (insn->type == INSN_BUG ||
+	     (insn->type == INSN_JUMP_UNCONDITIONAL &&
+	      insn->jump_dest && insn->jump_dest->type == INSN_BUG)))
+		return true;
+
 	/*
 	 * Check if this (or a subsequent) instruction is related to
 	 * CONFIG_UBSAN or CONFIG_KASAN.
 	 *
 	 * End the search at 5 instructions to avoid going into the weeds.
 	 */
-	if (!insn->func)
-		return false;
 	for (i = 0; i < 5; i++) {
 
 		if (is_kasan_insn(insn) || is_ubsan_insn(insn))
-- 
2.20.1

[PATCH 4.19 36/46] objtool: Support Clang non-section symbols in ORC dump

[Greg Kroah-Hartman]

From: Josh Poimboeuf <jpoimboe@redhat.com>

[ Upstream commit 8782e7cab51b6bf01a5a86471dd82228af1ac185 ]

Historically, the relocation symbols for ORC entries have only been
section symbols:

  .text+0: sp:sp+8 bp:(und) type:call end:0

However, the Clang assembler is aggressive about stripping section
symbols.  In that case we will need to use function symbols:

  freezing_slow_path+0: sp:sp+8 bp:(und) type:call end:0

In preparation for the generation of such entries in "objtool orc
generate", add support for reading them in "objtool orc dump".

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/b811b5eb1a42602c3b523576dc5efab9ad1c174d.1585761021.git.jpoimboe@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/objtool/orc_dump.c | 44 ++++++++++++++++++++++++----------------
 1 file changed, 27 insertions(+), 17 deletions(-)

diff --git a/tools/objtool/orc_dump.c b/tools/objtool/orc_dump.c
index faa444270ee3a..1a3e774941f8e 100644
--- a/tools/objtool/orc_dump.c
+++ b/tools/objtool/orc_dump.c
@@ -78,7 +78,7 @@ int orc_dump(const char *_objname)
 	char *name;
 	size_t nr_sections;
 	Elf64_Addr orc_ip_addr = 0;
-	size_t shstrtab_idx;
+	size_t shstrtab_idx, strtab_idx = 0;
 	Elf *elf;
 	Elf_Scn *scn;
 	GElf_Shdr sh;
@@ -139,6 +139,8 @@ int orc_dump(const char *_objname)
 
 		if (!strcmp(name, ".symtab")) {
 			symtab = data;
+		} else if (!strcmp(name, ".strtab")) {
+			strtab_idx = i;
 		} else if (!strcmp(name, ".orc_unwind")) {
 			orc = data->d_buf;
 			orc_size = sh.sh_size;
@@ -150,7 +152,7 @@ int orc_dump(const char *_objname)
 		}
 	}
 
-	if (!symtab || !orc || !orc_ip)
+	if (!symtab || !strtab_idx || !orc || !orc_ip)
 		return 0;
 
 	if (orc_size % sizeof(*orc) != 0) {
@@ -171,21 +173,29 @@ int orc_dump(const char *_objname)
 				return -1;
 			}
 
-			scn = elf_getscn(elf, sym.st_shndx);
-			if (!scn) {
-				WARN_ELF("elf_getscn");
-				return -1;
-			}
-
-			if (!gelf_getshdr(scn, &sh)) {
-				WARN_ELF("gelf_getshdr");
-				return -1;
-			}
-
-			name = elf_strptr(elf, shstrtab_idx, sh.sh_name);
-			if (!name || !*name) {
-				WARN_ELF("elf_strptr");
-				return -1;
+			if (GELF_ST_TYPE(sym.st_info) == STT_SECTION) {
+				scn = elf_getscn(elf, sym.st_shndx);
+				if (!scn) {
+					WARN_ELF("elf_getscn");
+					return -1;
+				}
+
+				if (!gelf_getshdr(scn, &sh)) {
+					WARN_ELF("gelf_getshdr");
+					return -1;
+				}
+
+				name = elf_strptr(elf, shstrtab_idx, sh.sh_name);
+				if (!name) {
+					WARN_ELF("elf_strptr");
+					return -1;
+				}
+			} else {
+				name = elf_strptr(elf, strtab_idx, sym.st_name);
+				if (!name) {
+					WARN_ELF("elf_strptr");
+					return -1;
+				}
 			}
 
 			printf("%s+%llx:", name, (unsigned long long)rela.r_addend);
-- 
2.20.1

[PATCH 4.19 37/46] xen/xenbus: ensure xenbus_map_ring_valloc() returns proper grant status

[Greg Kroah-Hartman]

From: Juergen Gross <jgross@suse.com>

[ Upstream commit 6b51fd3f65a22e3d1471b18a1d56247e246edd46 ]

xenbus_map_ring_valloc() maps a ring page and returns the status of the
used grant (0 meaning success).

There are Xen hypervisors which might return the value 1 for the status
of a failed grant mapping due to a bug. Some callers of
xenbus_map_ring_valloc() test for errors by testing the returned status
to be less than zero, resulting in no error detected and crashing later
due to a not available ring page.

Set the return value of xenbus_map_ring_valloc() to GNTST_general_error
in case the grant status reported by Xen is greater than zero.

This is part of XSA-316.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Wei Liu <wl@xen.org>
Link: https://lore.kernel.org/r/20200326080358.1018-1-jgross@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/xen/xenbus/xenbus_client.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
index a1c17000129ba..e94a61eaeceb0 100644
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -450,7 +450,14 @@ EXPORT_SYMBOL_GPL(xenbus_free_evtchn);
 int xenbus_map_ring_valloc(struct xenbus_device *dev, grant_ref_t *gnt_refs,
 			   unsigned int nr_grefs, void **vaddr)
 {
-	return ring_ops->map(dev, gnt_refs, nr_grefs, vaddr);
+	int err;
+
+	err = ring_ops->map(dev, gnt_refs, nr_grefs, vaddr);
+	/* Some hypervisors are buggy and can return 1. */
+	if (err > 0)
+		err = GNTST_general_error;
+
+	return err;
 }
 EXPORT_SYMBOL_GPL(xenbus_map_ring_valloc);
 
-- 
2.20.1

[PATCH 4.19 38/46] ALSA: hda: call runtime_allow() for all hda controllers

[Greg Kroah-Hartman]

From: Hui Wang <hui.wang@canonical.com>

[ Upstream commit 9a6418487b566503c772cb6e7d3d44e652b019b0 ]

Before the pci_driver->probe() is called, the pci subsystem calls
runtime_forbid() and runtime_get_sync() on this pci dev, so only call
runtime_put_autosuspend() is not enough to enable the runtime_pm on
this device.

For controllers with vgaswitcheroo feature, the pci/quirks.c will call
runtime_allow() for this dev, then the controllers could enter
rt_idle/suspend/resume, but for non-vgaswitcheroo controllers like
Intel hda controllers, the runtime_pm is not enabled because the
runtime_allow() is not called.

Since it is no harm calling runtime_allow() twice, here let hda
driver call runtime_allow() for all controllers. Then the runtime_pm
is enabled on all controllers after the put_autosuspend() is called.

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://lore.kernel.org/r/20200414142725.6020-1-hui.wang@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/pci/hda/hda_intel.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index ff448abb5449f..0d7981eda2c4f 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2477,6 +2477,7 @@ static int azx_probe_continue(struct azx *chip)
 
 	if (azx_has_pm_runtime(chip)) {
 		pm_runtime_use_autosuspend(&pci->dev);
+		pm_runtime_allow(&pci->dev);
 		pm_runtime_put_autosuspend(&pci->dev);
 	}
 
-- 
2.20.1

[PATCH 4.19 39/46] arm64: Delete the space separator in __emit_inst

[Greg Kroah-Hartman]

From: Fangrui Song <maskray@google.com>

[ Upstream commit c9a4ef66450145a356a626c833d3d7b1668b3ded ]

In assembly, many instances of __emit_inst(x) expand to a directive. In
a few places __emit_inst(x) is used as an assembler macro argument. For
example, in arch/arm64/kvm/hyp/entry.S

  ALTERNATIVE(nop, SET_PSTATE_PAN(1), ARM64_HAS_PAN, CONFIG_ARM64_PAN)

expands to the following by the C preprocessor:

  alternative_insn nop, .inst (0xd500401f | ((0) << 16 | (4) << 5) | ((!!1) << 8)), 4, 1

Both comma and space are separators, with an exception that content
inside a pair of parentheses/quotes is not split, so the clang
integrated assembler splits the arguments to:

   nop, .inst, (0xd500401f | ((0) << 16 | (4) << 5) | ((!!1) << 8)), 4, 1

GNU as preprocesses the input with do_scrub_chars(). Its arm64 backend
(along with many other non-x86 backends) sees:

  alternative_insn nop,.inst(0xd500401f|((0)<<16|(4)<<5)|((!!1)<<8)),4,1
  # .inst(...) is parsed as one argument

while its x86 backend sees:

  alternative_insn nop,.inst (0xd500401f|((0)<<16|(4)<<5)|((!!1)<<8)),4,1
  # The extra space before '(' makes the whole .inst (...) parsed as two arguments

The non-x86 backend's behavior is considered unintentional
(https://sourceware.org/bugzilla/show_bug.cgi?id=25750).
So drop the space separator inside `.inst (...)` to make the clang
integrated assembler work.

Suggested-by: Ilie Halip <ilie.halip@gmail.com>
Signed-off-by: Fangrui Song <maskray@google.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Link: https://github.com/ClangBuiltLinux/linux/issues/939
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm64/include/asm/sysreg.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 3091ae5975a3a..ed99d941c4623 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -60,7 +60,9 @@
 #ifndef CONFIG_BROKEN_GAS_INST
 
 #ifdef __ASSEMBLY__
-#define __emit_inst(x)			.inst (x)
+// The space separator is omitted so that __emit_inst(x) can be parsed as
+// either an assembler directive or an assembler macro argument.
+#define __emit_inst(x)			.inst(x)
 #else
 #define __emit_inst(x)			".inst " __stringify((x)) "\n\t"
 #endif
-- 
2.20.1

[PATCH 4.19 40/46] ext4: use matching invalidatepage in ext4_writepage

[Greg Kroah-Hartman]

From: yangerkun <yangerkun@huawei.com>

[ Upstream commit c2a559bc0e7ed5a715ad6b947025b33cb7c05ea7 ]

Run generic/388 with journal data mode sometimes may trigger the warning
in ext4_invalidatepage. Actually, we should use the matching invalidatepage
in ext4_writepage.

Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200226041002.13914-1-yangerkun@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/ext4/inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 000fa0e392787..3b1a7597af15e 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2128,7 +2128,7 @@ static int ext4_writepage(struct page *page,
 	bool keep_towrite = false;
 
 	if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) {
-		ext4_invalidatepage(page, 0, PAGE_SIZE);
+		inode->i_mapping->a_ops->invalidatepage(page, 0, PAGE_SIZE);
 		unlock_page(page);
 		return -EIO;
 	}
-- 
2.20.1

[PATCH 4.19 41/46] ext4: increase wait time needed before reuse of deleted inode numbers

[Greg Kroah-Hartman]

From: Theodore Ts'o <tytso@mit.edu>

[ Upstream commit a17a9d935dc4a50acefaf319d58030f1da7f115a ]

Current wait times have proven to be too short to protect against inode
reuses that lead to metadata inconsistencies.

Now that we will retry the inode allocation if we can't find any
recently deleted inodes, it's a lot safer to increase the recently
deleted time from 5 seconds to a minute.

Link: https://lore.kernel.org/r/20200414023925.273867-1-tytso@mit.edu
Google-Bug-Id: 36602237
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/ext4/ialloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index dafa7e4aaecb9..8876eaad10f68 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -665,7 +665,7 @@ static int find_group_other(struct super_block *sb, struct inode *parent,
  * block has been written back to disk.  (Yes, these values are
  * somewhat arbitrary...)
  */
-#define RECENTCY_MIN	5
+#define RECENTCY_MIN	60
 #define RECENTCY_DIRTY	300
 
 static int recently_deleted(struct super_block *sb, ext4_group_t group, int ino)
-- 
2.20.1

[PATCH 4.19 42/46] ext4: convert BUG_ONs to WARN_ONs in mballoc.c

[Greg Kroah-Hartman]

From: Theodore Ts'o <tytso@mit.edu>

[ Upstream commit 907ea529fc4c3296701d2bfc8b831dd2a8121a34 ]

If the in-core buddy bitmap gets corrupted (or out of sync with the
block bitmap), issue a WARN_ON and try to recover.  In most cases this
involves skipping trying to allocate out of a particular block group.
We can end up declaring the file system corrupted, which is fair,
since the file system probably should be checked before we proceed any
further.

Link: https://lore.kernel.org/r/20200414035649.293164-1-tytso@mit.edu
Google-Bug-Id: 34811296
Google-Bug-Id: 34639169
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/ext4/mballoc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 71121fcf9e8cc..8dd54a8a03610 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1936,7 +1936,8 @@ void ext4_mb_complex_scan_group(struct ext4_allocation_context *ac,
 	int free;
 
 	free = e4b->bd_info->bb_free;
-	BUG_ON(free <= 0);
+	if (WARN_ON(free <= 0))
+		return;
 
 	i = e4b->bd_info->bb_first_free;
 
@@ -1959,7 +1960,8 @@ void ext4_mb_complex_scan_group(struct ext4_allocation_context *ac,
 		}
 
 		mb_find_extent(e4b, i, ac->ac_g_ex.fe_len, &ex);
-		BUG_ON(ex.fe_len <= 0);
+		if (WARN_ON(ex.fe_len <= 0))
+			break;
 		if (free < ex.fe_len) {
 			ext4_grp_locked_error(sb, e4b->bd_group, 0, 0,
 					"%d free clusters as per "
-- 
2.20.1

[PATCH 4.19 43/46] hwmon: (jc42) Fix name to have no illegal characters

[Greg Kroah-Hartman]

From: Sascha Hauer <s.hauer@pengutronix.de>

[ Upstream commit c843b382e61b5f28a3d917712c69a344f632387c ]

The jc42 driver passes I2C client's name as hwmon device name. In case
of device tree probed devices this ends up being part of the compatible
string, "jc-42.4-temp". This name contains hyphens and the hwmon core
doesn't like this:

jc42 2-0018: hwmon: 'jc-42.4-temp' is not a valid name attribute, please fix

This changes the name to "jc42" which doesn't have any illegal
characters.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Link: https://lore.kernel.org/r/20200417092853.31206-1-s.hauer@pengutronix.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/hwmon/jc42.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hwmon/jc42.c
+++ b/drivers/hwmon/jc42.c
@@ -527,7 +527,7 @@ static int jc42_probe(struct i2c_client
 	}
 	data->config = config;
 
-	hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
+	hwmon_dev = devm_hwmon_device_register_with_info(dev, "jc42",
 							 data, &jc42_chip_info,
 							 NULL);
 	return PTR_ERR_OR_ZERO(hwmon_dev);

[PATCH 4.19 44/46] bpf, x86_32: Fix clobbering of dst for BPF_JSET

[Greg Kroah-Hartman]

From: Luke Nelson <lukenels@cs.washington.edu>

commit 50fe7ebb6475711c15b3397467e6424e20026d94 upstream.

The current JIT clobbers the destination register for BPF_JSET BPF_X
and BPF_K by using "and" and "or" instructions. This is fine when the
destination register is a temporary loaded from a register stored on
the stack but not otherwise.

This patch fixes the problem (for both BPF_K and BPF_X) by always loading
the destination register into temporaries since BPF_JSET should not
modify the destination register.

This bug may not be currently triggerable as BPF_REG_AX is the only
register not stored on the stack and the verifier uses it in a limited
way.

Fixes: 03f5781be2c7b ("bpf, x86_32: add eBPF JIT compiler for ia32")
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Luke Nelson <luke.r.nels@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Wang YanQing <udknight@gmail.com>
Link: https://lore.kernel.org/bpf/20200422173630.8351-2-luke.r.nels@gmail.com
Signed-off-by: Wang YanQing <udknight@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/net/bpf_jit_comp32.c |   20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

--- a/arch/x86/net/bpf_jit_comp32.c
+++ b/arch/x86/net/bpf_jit_comp32.c
@@ -1970,8 +1970,8 @@ static int do_jit(struct bpf_prog *bpf_p
 			goto emit_cond_jmp_signed;
 		}
 		case BPF_JMP | BPF_JSET | BPF_X: {
-			u8 dreg_lo = dstk ? IA32_EAX : dst_lo;
-			u8 dreg_hi = dstk ? IA32_EDX : dst_hi;
+			u8 dreg_lo = IA32_EAX;
+			u8 dreg_hi = IA32_EDX;
 			u8 sreg_lo = sstk ? IA32_ECX : src_lo;
 			u8 sreg_hi = sstk ? IA32_EBX : src_hi;
 
@@ -1980,6 +1980,12 @@ static int do_jit(struct bpf_prog *bpf_p
 				      STACK_VAR(dst_lo));
 				EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EDX),
 				      STACK_VAR(dst_hi));
+			} else {
+				/* mov dreg_lo,dst_lo */
+				EMIT2(0x89, add_2reg(0xC0, dreg_lo, dst_lo));
+				/* mov dreg_hi,dst_hi */
+				EMIT2(0x89,
+				      add_2reg(0xC0, dreg_hi, dst_hi));
 			}
 
 			if (sstk) {
@@ -1998,8 +2004,8 @@ static int do_jit(struct bpf_prog *bpf_p
 		}
 		case BPF_JMP | BPF_JSET | BPF_K: {
 			u32 hi;
-			u8 dreg_lo = dstk ? IA32_EAX : dst_lo;
-			u8 dreg_hi = dstk ? IA32_EDX : dst_hi;
+			u8 dreg_lo = IA32_EAX;
+			u8 dreg_hi = IA32_EDX;
 			u8 sreg_lo = IA32_ECX;
 			u8 sreg_hi = IA32_EBX;
 
@@ -2008,6 +2014,12 @@ static int do_jit(struct bpf_prog *bpf_p
 				      STACK_VAR(dst_lo));
 				EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EDX),
 				      STACK_VAR(dst_hi));
+			} else {
+				/* mov dreg_lo,dst_lo */
+				EMIT2(0x89, add_2reg(0xC0, dreg_lo, dst_lo));
+				/* mov dreg_hi,dst_hi */
+				EMIT2(0x89,
+				      add_2reg(0xC0, dreg_hi, dst_hi));
 			}
 			hi = imm32 & (1<<31) ? (u32)~0 : 0;
 

[PATCH 4.19 45/46] qed: Fix use after free in qed_chain_free

[Greg Kroah-Hartman]

From: Yuval Basson <ybason@marvell.com>

commit 8063f761cd7c17fc1d0018728936e0c33a25388a upstream.

The qed_chain data structure was modified in
commit 1a4a69751f4d ("qed: Chain support for external PBL") to support
receiving an external pbl (due to iWARP FW requirements).
The pages pointed to by the pbl are allocated in qed_chain_alloc
and their virtual address are stored in an virtual addresses array to
enable accessing and freeing the data. The physical addresses however
weren't stored and were accessed directly from the external-pbl
during free.

Destroy-qp flow, leads to freeing the external pbl before the chain is
freed, when the chain is freed it tries accessing the already freed
external pbl, leading to a use-after-free. Therefore we need to store
the physical addresses in additional to the virtual addresses in a
new data structure.

Fixes: 1a4a69751f4d ("qed: Chain support for external PBL")
Signed-off-by: Michal Kalderon <mkalderon@marvell.com>
Signed-off-by: Yuval Bason <ybason@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/ethernet/qlogic/qed/qed_dev.c |   38 ++++++++++++------------------
 include/linux/qed/qed_chain.h             |   24 +++++++++++-------
 2 files changed, 31 insertions(+), 31 deletions(-)

--- a/drivers/net/ethernet/qlogic/qed/qed_dev.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dev.c
@@ -3316,26 +3316,20 @@ static void qed_chain_free_single(struct
 
 static void qed_chain_free_pbl(struct qed_dev *cdev, struct qed_chain *p_chain)
 {
-	void **pp_virt_addr_tbl = p_chain->pbl.pp_virt_addr_tbl;
+	struct addr_tbl_entry *pp_addr_tbl = p_chain->pbl.pp_addr_tbl;
 	u32 page_cnt = p_chain->page_cnt, i, pbl_size;
-	u8 *p_pbl_virt = p_chain->pbl_sp.p_virt_table;
 
-	if (!pp_virt_addr_tbl)
+	if (!pp_addr_tbl)
 		return;
 
-	if (!p_pbl_virt)
-		goto out;
-
 	for (i = 0; i < page_cnt; i++) {
-		if (!pp_virt_addr_tbl[i])
+		if (!pp_addr_tbl[i].virt_addr || !pp_addr_tbl[i].dma_map)
 			break;
 
 		dma_free_coherent(&cdev->pdev->dev,
 				  QED_CHAIN_PAGE_SIZE,
-				  pp_virt_addr_tbl[i],
-				  *(dma_addr_t *)p_pbl_virt);
-
-		p_pbl_virt += QED_CHAIN_PBL_ENTRY_SIZE;
+				  pp_addr_tbl[i].virt_addr,
+				  pp_addr_tbl[i].dma_map);
 	}
 
 	pbl_size = page_cnt * QED_CHAIN_PBL_ENTRY_SIZE;
@@ -3345,9 +3339,9 @@ static void qed_chain_free_pbl(struct qe
 				  pbl_size,
 				  p_chain->pbl_sp.p_virt_table,
 				  p_chain->pbl_sp.p_phys_table);
-out:
-	vfree(p_chain->pbl.pp_virt_addr_tbl);
-	p_chain->pbl.pp_virt_addr_tbl = NULL;
+
+	vfree(p_chain->pbl.pp_addr_tbl);
+	p_chain->pbl.pp_addr_tbl = NULL;
 }
 
 void qed_chain_free(struct qed_dev *cdev, struct qed_chain *p_chain)
@@ -3448,19 +3442,19 @@ qed_chain_alloc_pbl(struct qed_dev *cdev
 {
 	u32 page_cnt = p_chain->page_cnt, size, i;
 	dma_addr_t p_phys = 0, p_pbl_phys = 0;
-	void **pp_virt_addr_tbl = NULL;
+	struct addr_tbl_entry *pp_addr_tbl;
 	u8 *p_pbl_virt = NULL;
 	void *p_virt = NULL;
 
-	size = page_cnt * sizeof(*pp_virt_addr_tbl);
-	pp_virt_addr_tbl = vzalloc(size);
-	if (!pp_virt_addr_tbl)
+	size = page_cnt * sizeof(*pp_addr_tbl);
+	pp_addr_tbl =  vzalloc(size);
+	if (!pp_addr_tbl)
 		return -ENOMEM;
 
 	/* The allocation of the PBL table is done with its full size, since it
 	 * is expected to be successive.
 	 * qed_chain_init_pbl_mem() is called even in a case of an allocation
-	 * failure, since pp_virt_addr_tbl was previously allocated, and it
+	 * failure, since tbl was previously allocated, and it
 	 * should be saved to allow its freeing during the error flow.
 	 */
 	size = page_cnt * QED_CHAIN_PBL_ENTRY_SIZE;
@@ -3474,8 +3468,7 @@ qed_chain_alloc_pbl(struct qed_dev *cdev
 		p_chain->b_external_pbl = true;
 	}
 
-	qed_chain_init_pbl_mem(p_chain, p_pbl_virt, p_pbl_phys,
-			       pp_virt_addr_tbl);
+	qed_chain_init_pbl_mem(p_chain, p_pbl_virt, p_pbl_phys, pp_addr_tbl);
 	if (!p_pbl_virt)
 		return -ENOMEM;
 
@@ -3494,7 +3487,8 @@ qed_chain_alloc_pbl(struct qed_dev *cdev
 		/* Fill the PBL table with the physical address of the page */
 		*(dma_addr_t *)p_pbl_virt = p_phys;
 		/* Keep the virtual address of the page */
-		p_chain->pbl.pp_virt_addr_tbl[i] = p_virt;
+		p_chain->pbl.pp_addr_tbl[i].virt_addr = p_virt;
+		p_chain->pbl.pp_addr_tbl[i].dma_map = p_phys;
 
 		p_pbl_virt += QED_CHAIN_PBL_ENTRY_SIZE;
 	}
--- a/include/linux/qed/qed_chain.h
+++ b/include/linux/qed/qed_chain.h
@@ -97,6 +97,11 @@ struct qed_chain_u32 {
 	u32 cons_idx;
 };
 
+struct addr_tbl_entry {
+	void *virt_addr;
+	dma_addr_t dma_map;
+};
+
 struct qed_chain {
 	/* fastpath portion of the chain - required for commands such
 	 * as produce / consume.
@@ -107,10 +112,11 @@ struct qed_chain {
 
 	/* Fastpath portions of the PBL [if exists] */
 	struct {
-		/* Table for keeping the virtual addresses of the chain pages,
-		 * respectively to the physical addresses in the pbl table.
+		/* Table for keeping the virtual and physical addresses of the
+		 * chain pages, respectively to the physical addresses
+		 * in the pbl table.
 		 */
-		void **pp_virt_addr_tbl;
+		struct addr_tbl_entry *pp_addr_tbl;
 
 		union {
 			struct qed_chain_pbl_u16 u16;
@@ -287,7 +293,7 @@ qed_chain_advance_page(struct qed_chain
 				*(u32 *)page_to_inc = 0;
 			page_index = *(u32 *)page_to_inc;
 		}
-		*p_next_elem = p_chain->pbl.pp_virt_addr_tbl[page_index];
+		*p_next_elem = p_chain->pbl.pp_addr_tbl[page_index].virt_addr;
 	}
 }
 
@@ -537,7 +543,7 @@ static inline void qed_chain_init_params
 
 	p_chain->pbl_sp.p_phys_table = 0;
 	p_chain->pbl_sp.p_virt_table = NULL;
-	p_chain->pbl.pp_virt_addr_tbl = NULL;
+	p_chain->pbl.pp_addr_tbl = NULL;
 }
 
 /**
@@ -575,11 +581,11 @@ static inline void qed_chain_init_mem(st
 static inline void qed_chain_init_pbl_mem(struct qed_chain *p_chain,
 					  void *p_virt_pbl,
 					  dma_addr_t p_phys_pbl,
-					  void **pp_virt_addr_tbl)
+					  struct addr_tbl_entry *pp_addr_tbl)
 {
 	p_chain->pbl_sp.p_phys_table = p_phys_pbl;
 	p_chain->pbl_sp.p_virt_table = p_virt_pbl;
-	p_chain->pbl.pp_virt_addr_tbl = pp_virt_addr_tbl;
+	p_chain->pbl.pp_addr_tbl = pp_addr_tbl;
 }
 
 /**
@@ -644,7 +650,7 @@ static inline void *qed_chain_get_last_e
 		break;
 	case QED_CHAIN_MODE_PBL:
 		last_page_idx = p_chain->page_cnt - 1;
-		p_virt_addr = p_chain->pbl.pp_virt_addr_tbl[last_page_idx];
+		p_virt_addr = p_chain->pbl.pp_addr_tbl[last_page_idx].virt_addr;
 		break;
 	}
 	/* p_virt_addr points at this stage to the last page of the chain */
@@ -716,7 +722,7 @@ static inline void qed_chain_pbl_zero_me
 	page_cnt = qed_chain_get_page_cnt(p_chain);
 
 	for (i = 0; i < page_cnt; i++)
-		memset(p_chain->pbl.pp_virt_addr_tbl[i], 0,
+		memset(p_chain->pbl.pp_addr_tbl[i].virt_addr, 0,
 		       QED_CHAIN_PAGE_SIZE);
 }
 

[PATCH 4.19 46/46] ext4: check for non-zero journal inum in ext4_calculate_overhead

[Greg Kroah-Hartman]

From: Ritesh Harjani <riteshh@linux.ibm.com>

commit f1eec3b0d0a849996ebee733b053efa71803dad5 upstream.

While calculating overhead for internal journal, also check
that j_inum shouldn't be 0. Otherwise we get below error with
xfstests generic/050 with external journal (XXX_LOGDEV config) enabled.

It could be simply reproduced with loop device with an external journal
and marking blockdev as RO before mounting.

[ 3337.146838] EXT4-fs error (device pmem1p2): ext4_get_journal_inode:4634: comm mount: inode #0: comm mount: iget: illegal inode #
------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device pmem1p2 (partno 2)
WARNING: CPU: 107 PID: 115347 at block/blk-core.c:788 generic_make_request_checks+0x6b4/0x7d0
CPU: 107 PID: 115347 Comm: mount Tainted: G             L   --------- -t - 4.18.0-167.el8.ppc64le #1
NIP:  c0000000006f6d44 LR: c0000000006f6d40 CTR: 0000000030041dd4
<...>
NIP [c0000000006f6d44] generic_make_request_checks+0x6b4/0x7d0
LR [c0000000006f6d40] generic_make_request_checks+0x6b0/0x7d0
<...>
Call Trace:
generic_make_request_checks+0x6b0/0x7d0 (unreliable)
generic_make_request+0x3c/0x420
submit_bio+0xd8/0x200
submit_bh_wbc+0x1e8/0x250
__sync_dirty_buffer+0xd0/0x210
ext4_commit_super+0x310/0x420 [ext4]
__ext4_error+0xa4/0x1e0 [ext4]
__ext4_iget+0x388/0xe10 [ext4]
ext4_get_journal_inode+0x40/0x150 [ext4]
ext4_calculate_overhead+0x5a8/0x610 [ext4]
ext4_fill_super+0x3188/0x3260 [ext4]
mount_bdev+0x778/0x8f0
ext4_mount+0x28/0x50 [ext4]
mount_fs+0x74/0x230
vfs_kern_mount.part.6+0x6c/0x250
do_mount+0x2fc/0x1280
sys_mount+0x158/0x180
system_call+0x5c/0x70
EXT4-fs (pmem1p2): no journal found
EXT4-fs (pmem1p2): can't get journal size
EXT4-fs (pmem1p2): mounted filesystem without journal. Opts: dax,norecovery

Fixes: 3c816ded78bb ("ext4: use journal inode to determine journal overhead")
Reported-by: Harish Sriram <harish@linux.ibm.com>
Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200316093038.25485-1-riteshh@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/ext4/super.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3524,7 +3524,8 @@ int ext4_calculate_overhead(struct super
 	 */
 	if (sbi->s_journal && !sbi->journal_bdev)
 		overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen);
-	else if (ext4_has_feature_journal(sb) && !sbi->s_journal) {
+	else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) {
+		/* j_inum for internal journal is non-zero */
 		j_inode = ext4_get_journal_inode(sb, j_inum);
 		if (j_inode) {
 			j_blocks = j_inode->i_size >> sb->s_blocksize_bits;

Re: [PATCH 4.19 00/46] 4.19.120-rc1 review

[Jon Hunter]

On 01/05/2020 14:22, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.19.120 release.
> There are 46 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 Sun, 03 May 2020 13:12:02 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.120-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

All tests are passing for Tegra ...

Test results for stable-v4.19:
    11 builds:	11 pass, 0 fail
    22 boots:	22 pass, 0 fail
    32 tests:	32 pass, 0 fail

Linux version:	4.19.120-rc1-g81d4e31e1418
Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
                tegra194-p2972-0000, tegra20-ventana,
                tegra210-p2371-2180, tegra30-cardhu-a04

Cheers
Jon

-- 
nvpublic

Re: [PATCH 4.19 00/46] 4.19.120-rc1 review

[Naresh Kamboju]

On Fri, 1 May 2020 at 19:06, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 4.19.120 release.
> There are 46 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 Sun, 03 May 2020 13:12:02 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.120-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Results from Linaro’s test farm.
No regressions on arm64, arm, x86_64, and i386.

Summary
------------------------------------------------------------------------

kernel: 4.19.120-rc1
git repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git branch: linux-4.19.y
git commit: 81d4e31e141844fdb5678510f819e09de1c9f607
git describe: v4.19.119-47-g81d4e31e1418
Test details: https://qa-reports.linaro.org/lkft/linux-stable-rc-4.19-oe/build/v4.19.119-47-g81d4e31e1418

No regressions (compared to build v5.6.8)

No fixes (compared to build v5.6.8)

Ran 28833 total tests in the following environments and test suites.

Environments
--------------
- dragonboard-410c - arm64
- hi6220-hikey - arm64
- i386
- juno-r2 - arm64
- juno-r2-compat
- juno-r2-kasan
- nxp-ls2088
- qemu_arm
- qemu_arm64
- qemu_i386
- qemu_x86_64
- x15 - arm
- x86_64
- x86-kasan

Test Suites
-----------
* build
* install-android-platform-tools-r2600
* install-android-platform-tools-r2800
* linux-log-parser
* ltp-containers-tests
* ltp-fcntl-locktests-tests
* ltp-filecaps-tests
* ltp-fs_bind-tests
* ltp-fs_perms_simple-tests
* ltp-fsx-tests
* ltp-hugetlb-tests
* ltp-mm-tests
* ltp-nptl-tests
* ltp-pty-tests
* ltp-sched-tests
* ltp-securebits-tests
* ltp-syscalls-tests
* v4l2-compliance
* kselftest
* kselftest/drivers
* kselftest/filesystems
* kselftest/net
* kselftest/networking
* kvm-unit-tests
* ltp-cap_bounds-tests
* ltp-commands-tests
* ltp-cpuhotplug-tests
* ltp-crypto-tests
* ltp-cve-tests
* ltp-dio-tests
* ltp-io-tests
* ltp-ipc-tests
* ltp-math-tests
* network-basic-tests
* perf
* libhugetlbfs
* ltp-fs-tests
* ltp-open-posix-tests
* kselftest-vsyscall-mode-native
* kselftest-vsyscall-mode-native/drivers
* kselftest-vsyscall-mode-native/filesystems
* kselftest-vsyscall-mode-native/net
* kselftest-vsyscall-mode-native/networking
* kselftest-vsyscall-mode-none
* kselftest-vsyscall-mode-none/drivers
* kselftest-vsyscall-mode-none/filesystems
* kselftest-vsyscall-mode-none/net
* kselftest-vsyscall-mode-none/networking

-- 
Linaro LKFT
https://lkft.linaro.org

Re: [PATCH 4.19 00/46] 4.19.120-rc1 review

[Guenter Roeck]

On Fri, May 01, 2020 at 03:22:25PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.19.120 release.
> There are 46 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 Sun, 03 May 2020 13:12:02 +0000.
> Anything received after that time might be too late.
> 

Build results:
	total: 155 pass: 155 fail: 0
Qemu test results:
	total: 418 pass: 418 fail: 0

Guenter

Re: [PATCH 4.19 00/46] 4.19.120-rc1 review

[shuah]

On 5/1/20 7:22 AM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.19.120 release.
> There are 46 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 Sun, 03 May 2020 13:12:02 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.120-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 

Compiled and booted on my test system. No dmesg regressions.

thanks,
-- Shuah