[net-next 0/8][pull request] 100GbE Intel Wired LAN Driver Updates 2019-08-04

[net-next 0/8][pull request] 100GbE Intel Wired LAN Driver Updates 2019-08-04

[Jeff Kirsher]

This series contains more updates to fm10k from Jake Keller.

Jake removes the unnecessary initialization of some variables to help
resolve static code checker warnings.  Explicitly return success during
resume, since the value of 'err' is always success.  Fixed a issue with
incrementing a void pointer, which can produce undefined behavior.  Used
the __always_unused macro for function templates that are passed as
parameters in functions, but are not used.  Simplified the code by
removing an unnecessary macro in determining the value of NON_Q_VECTORS.
Fixed an issue, using bitwise operations to prevent the low address
overwriting the high portion of the address.

The following are changes since commit 9e8fb25254f76cb483303d8e9a97ed80a65418fe:
  Merge branch 'net-l3-l4-functional-tests'
and are available in the git repository at:
  git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue 100GbE

Jacob Keller (8):
  fm10k: remove unnecessary variable initializer
  fm10k: remove needless assignment of err local variable
  fm10k: remove needless initialization of size local variable
  fm10k: explicitly return 0 on success path in function
  fm10k: cast page_addr to u8 * when incrementing it
  fm10k: mark unused parameters with __always_unused
  fm10k: convert NON_Q_VECTORS(hw) into NON_Q_VECTORS
  fm10k: fix fm10k_get_fault_pf to read correct address

 drivers/net/ethernet/intel/fm10k/fm10k.h      | 10 +++-----
 .../net/ethernet/intel/fm10k/fm10k_ethtool.c  |  6 ++---
 drivers/net/ethernet/intel/fm10k/fm10k_main.c |  6 ++---
 drivers/net/ethernet/intel/fm10k/fm10k_mbx.c  |  5 ++--
 .../net/ethernet/intel/fm10k/fm10k_netdev.c   | 12 ++++-----
 drivers/net/ethernet/intel/fm10k/fm10k_pci.c  | 11 ++++----
 drivers/net/ethernet/intel/fm10k/fm10k_pf.c   | 12 ++++-----
 drivers/net/ethernet/intel/fm10k/fm10k_tlv.c  |  9 ++++---
 drivers/net/ethernet/intel/fm10k/fm10k_type.h |  2 +-
 drivers/net/ethernet/intel/fm10k/fm10k_vf.c   | 25 +++++++++++--------
 10 files changed, 49 insertions(+), 49 deletions(-)

-- 
2.21.0

[net-next 1/8] fm10k: remove unnecessary variable initializer

[Jeff Kirsher]

From: Jacob Keller <jacob.e.keller@intel.com>

The err variable in the fm10k_tlv_attr_parse function is initialized
with zero. However, the function never reads err without first assigning
it from a function call. Remove this unnecessary initialization.

This was detected by cppcheck and resolves the following warning
produced by that tool:

[fm10k_tlv.c:498]: (style) Variable 'err' is assigned a value that is
never used.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/fm10k/fm10k_tlv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_tlv.c b/drivers/net/ethernet/intel/fm10k/fm10k_tlv.c
index 2a7a40bf2b1c..f4c42a40f934 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_tlv.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_tlv.c
@@ -472,7 +472,7 @@ static s32 fm10k_tlv_attr_parse(u32 *attr, u32 **results,
 				const struct fm10k_tlv_attr *tlv_attr)
 {
 	u32 i, attr_id, offset = 0;
-	s32 err = 0;
+	s32 err;
 	u16 len;
 
 	/* verify pointers are not NULL */
-- 
2.21.0

[net-next 2/8] fm10k: remove needless assignment of err local variable

[Jeff Kirsher]

From: Jacob Keller <jacob.e.keller@intel.com>

The local variable err in several functions in the fm10k_netdev.c file
is initialized with a value that is never used. The err value is
immediately re-assigned in all cases where it will be checked. Remove
the unnecessary initializers.

This was detected by cppcheck and resolves the following warnings
produced by that tool:

[fm10k_netdev.c:999] -> [fm10k_netdev.c:1004]: (style) Variable 'err' is
reassigned a value before the old one has been used.

[fm10k_netdev.c:1019] -> [fm10k_netdev.c:1024]: (style) Variable 'err'
is reassigned a value before the old one has been used.

[fm10k_netdev.c:64]: (style) Variable 'err' is assigned a value that is
never used.

[fm10k_netdev.c:131]: (style) Variable 'err' is assigned a value that
is never used.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/fm10k/fm10k_netdev.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
index 259da075093f..4704395c0f66 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright(c) 2013 - 2018 Intel Corporation. */
+/* Copyright(c) 2013 - 2019 Intel Corporation. */
 
 #include "fm10k.h"
 #include <linux/vmalloc.h>
@@ -54,7 +54,7 @@ int fm10k_setup_tx_resources(struct fm10k_ring *tx_ring)
  **/
 static int fm10k_setup_all_tx_resources(struct fm10k_intfc *interface)
 {
-	int i, err = 0;
+	int i, err;
 
 	for (i = 0; i < interface->num_tx_queues; i++) {
 		err = fm10k_setup_tx_resources(interface->tx_ring[i]);
@@ -121,7 +121,7 @@ int fm10k_setup_rx_resources(struct fm10k_ring *rx_ring)
  **/
 static int fm10k_setup_all_rx_resources(struct fm10k_intfc *interface)
 {
-	int i, err = 0;
+	int i, err;
 
 	for (i = 0; i < interface->num_rx_queues; i++) {
 		err = fm10k_setup_rx_resources(interface->rx_ring[i]);
@@ -871,7 +871,7 @@ static int fm10k_uc_vlan_unsync(struct net_device *netdev,
 	u16 glort = interface->glort;
 	u16 vid = interface->vid;
 	bool set = !!(vid / VLAN_N_VID);
-	int err = -EHOSTDOWN;
+	int err;
 
 	/* drop any leading bits on the VLAN ID */
 	vid &= VLAN_N_VID - 1;
@@ -891,7 +891,7 @@ static int fm10k_mc_vlan_unsync(struct net_device *netdev,
 	u16 glort = interface->glort;
 	u16 vid = interface->vid;
 	bool set = !!(vid / VLAN_N_VID);
-	int err = -EHOSTDOWN;
+	int err;
 
 	/* drop any leading bits on the VLAN ID */
 	vid &= VLAN_N_VID - 1;
-- 
2.21.0

[net-next 3/8] fm10k: remove needless initialization of size local variable

[Jeff Kirsher]

From: Jacob Keller <jacob.e.keller@intel.com>

The local variable 'size' in fm10k_dfwd_add_station is initialized, but
is always re-assigned immediately before use. Remove this unnecessary
initialization.

This was detected by cppcheck and resolves the following warning
produced by that tool:

[fm10k_netdev.c:1466]: (style) Variable 'size' is assigned a value that is never used.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/fm10k/fm10k_netdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
index 4704395c0f66..d3e85480f46d 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
@@ -1463,7 +1463,7 @@ static void *fm10k_dfwd_add_station(struct net_device *dev,
 	struct fm10k_l2_accel *old_l2_accel = NULL;
 	struct fm10k_dglort_cfg dglort = { 0 };
 	struct fm10k_hw *hw = &interface->hw;
-	int size = 0, i;
+	int size, i;
 	u16 vid, glort;
 
 	/* The hardware supported by fm10k only filters on the destination MAC
-- 
2.21.0

[net-next 4/8] fm10k: explicitly return 0 on success path in function

[Jeff Kirsher]

From: Jacob Keller <jacob.e.keller@intel.com>

In the fm10k_handle_resume function, return 0 explicitly at the end of
the function instead of returning the err value.

This was detected by cppcheck and resolves the following style warning
produced by that tool:

[fm10k_pci.c:2768] -> [fm10k_pci.c:2787]: (warning) Identical condition
'err', second condition is always false

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/fm10k/fm10k_pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
index 9522e9f8f8b8..73928dbe714f 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
@@ -2340,7 +2340,7 @@ static int fm10k_handle_resume(struct fm10k_intfc *interface)
 	/* Restart the MAC/VLAN request queue in-case of outstanding events */
 	fm10k_macvlan_schedule(interface);
 
-	return err;
+	return 0;
 }
 
 /**
-- 
2.21.0

[net-next 5/8] fm10k: cast page_addr to u8 * when incrementing it

[Jeff Kirsher]

From: Jacob Keller <jacob.e.keller@intel.com>

The page_addr variable is a void pointer. Incrementing it before calling
prefetch is technically undefined. Fix this by casting it to a u8*
pointer before incrementing it. This ensures that we increment the
pointer value in byte units, instead of relying on this undefined
behavior.

This was detected by cppcheck, and resolves the following warning
produced by that tool:

[fm10k_main.c:328]: (portability) 'page_addr' is of type 'void *'. When
using void pointers in calculations, the behaviour is undefined.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/fm10k/fm10k_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_main.c b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
index 9e6bddff7625..17a96a49174b 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_main.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
@@ -315,7 +315,7 @@ static struct sk_buff *fm10k_fetch_rx_buffer(struct fm10k_ring *rx_ring,
 		/* prefetch first cache line of first page */
 		prefetch(page_addr);
 #if L1_CACHE_BYTES < 128
-		prefetch(page_addr + L1_CACHE_BYTES);
+		prefetch((void *)((u8 *)page_addr + L1_CACHE_BYTES));
 #endif
 
 		/* allocate a skb to store the frags */
-- 
2.21.0

[net-next 6/8] fm10k: mark unused parameters with __always_unused

[Jeff Kirsher]

From: Jacob Keller <jacob.e.keller@intel.com>

Several functions in the fm10k driver have specific function templates,
as they are used as function pointers. The parameters in these functions
are not always used. Explicitly mark unused parameters with the
__always_unused macro, so that the compiler will not warn about them
when building with the -Wunused-parameter warning enabled.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/fm10k/fm10k_mbx.c  |  5 ++--
 drivers/net/ethernet/intel/fm10k/fm10k_pf.c   | 10 ++++----
 drivers/net/ethernet/intel/fm10k/fm10k_tlv.c  |  7 +++---
 drivers/net/ethernet/intel/fm10k/fm10k_type.h |  2 +-
 drivers/net/ethernet/intel/fm10k/fm10k_vf.c   | 25 +++++++++++--------
 5 files changed, 28 insertions(+), 21 deletions(-)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_mbx.c b/drivers/net/ethernet/intel/fm10k/fm10k_mbx.c
index aece335b41f8..75e51f91036c 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_mbx.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_mbx.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright(c) 2013 - 2018 Intel Corporation. */
+/* Copyright(c) 2013 - 2019 Intel Corporation. */
 
 #include "fm10k_common.h"
 
@@ -2134,7 +2134,8 @@ static s32 fm10k_sm_mbx_process(struct fm10k_hw *hw,
  *  DWORDs, not bytes.  Any invalid values will cause the mailbox to return
  *  error.
  **/
-s32 fm10k_sm_mbx_init(struct fm10k_hw *hw, struct fm10k_mbx_info *mbx,
+s32 fm10k_sm_mbx_init(struct fm10k_hw __always_unused *hw,
+		      struct fm10k_mbx_info *mbx,
 		      const struct fm10k_msg_data *msg_data)
 {
 	mbx->mbx_reg = FM10K_GMBX;
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
index e85b2f2eef05..095c5b0e4096 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright(c) 2013 - 2018 Intel Corporation. */
+/* Copyright(c) 2013 - 2019 Intel Corporation. */
 
 #include "fm10k_pf.h"
 #include "fm10k_vf.h"
@@ -1152,7 +1152,7 @@ static void fm10k_iov_update_stats_pf(struct fm10k_hw *hw,
  *  assumption is that in this case it is acceptable to just directly
  *  hand off the message from the VF to the underlying shared code.
  **/
-s32 fm10k_iov_msg_msix_pf(struct fm10k_hw *hw, u32 **results,
+s32 fm10k_iov_msg_msix_pf(struct fm10k_hw *hw, u32 __always_unused **results,
 			  struct fm10k_mbx_info *mbx)
 {
 	struct fm10k_vf_info *vf_info = (struct fm10k_vf_info *)mbx;
@@ -1641,7 +1641,7 @@ const struct fm10k_tlv_attr fm10k_lport_map_msg_attr[] = {
  *  switch API.
  **/
 s32 fm10k_msg_lport_map_pf(struct fm10k_hw *hw, u32 **results,
-			   struct fm10k_mbx_info *mbx)
+			   struct fm10k_mbx_info __always_unused *mbx)
 {
 	u16 glort, mask;
 	u32 dglort_map;
@@ -1684,7 +1684,7 @@ const struct fm10k_tlv_attr fm10k_update_pvid_msg_attr[] = {
  *  This handler configures the default VLAN for the PF
  **/
 static s32 fm10k_msg_update_pvid_pf(struct fm10k_hw *hw, u32 **results,
-				    struct fm10k_mbx_info *mbx)
+				    struct fm10k_mbx_info __always_unused *mbx)
 {
 	u16 glort, pvid;
 	u32 pvid_update;
@@ -1745,7 +1745,7 @@ const struct fm10k_tlv_attr fm10k_err_msg_attr[] = {
  *  messages that the PF has sent.
  **/
 s32 fm10k_msg_err_pf(struct fm10k_hw *hw, u32 **results,
-		     struct fm10k_mbx_info *mbx)
+		     struct fm10k_mbx_info __always_unused *mbx)
 {
 	struct fm10k_swapi_error err_msg;
 	s32 err;
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_tlv.c b/drivers/net/ethernet/intel/fm10k/fm10k_tlv.c
index f4c42a40f934..21eff0895a7a 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_tlv.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_tlv.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright(c) 2013 - 2018 Intel Corporation. */
+/* Copyright(c) 2013 - 2019 Intel Corporation. */
 
 #include "fm10k_tlv.h"
 
@@ -587,8 +587,9 @@ s32 fm10k_tlv_msg_parse(struct fm10k_hw *hw, u32 *msg,
  *  a minimum it just indicates that the message requested was
  *  unimplemented.
  **/
-s32 fm10k_tlv_msg_error(struct fm10k_hw *hw, u32 **results,
-			struct fm10k_mbx_info *mbx)
+s32 fm10k_tlv_msg_error(struct fm10k_hw __always_unused *hw,
+			u32 __always_unused **results,
+			struct fm10k_mbx_info __always_unused *mbx)
 {
 	return FM10K_NOT_IMPLEMENTED;
 }
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_type.h b/drivers/net/ethernet/intel/fm10k/fm10k_type.h
index 9fb9fca375e3..15ac1c7885bc 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_type.h
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_type.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright(c) 2013 - 2018 Intel Corporation. */
+/* Copyright(c) 2013 - 2019 Intel Corporation. */
 
 #ifndef _FM10K_TYPE_H_
 #define _FM10K_TYPE_H_
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_vf.c b/drivers/net/ethernet/intel/fm10k/fm10k_vf.c
index a8519c1f0406..dc8ccd378ec9 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_vf.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_vf.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright(c) 2013 - 2018 Intel Corporation. */
+/* Copyright(c) 2013 - 2019 Intel Corporation. */
 
 #include "fm10k_vf.h"
 
@@ -198,7 +198,7 @@ static s32 fm10k_update_vlan_vf(struct fm10k_hw *hw, u32 vid, u8 vsi, bool set)
  *  This function should determine the MAC address for the VF
  **/
 s32 fm10k_msg_mac_vlan_vf(struct fm10k_hw *hw, u32 **results,
-			  struct fm10k_mbx_info *mbx)
+			  struct fm10k_mbx_info __always_unused *mbx)
 {
 	u8 perm_addr[ETH_ALEN];
 	u16 vid;
@@ -267,8 +267,10 @@ static s32 fm10k_read_mac_addr_vf(struct fm10k_hw *hw)
  *  This function is used to add or remove unicast MAC addresses for
  *  the VF.
  **/
-static s32 fm10k_update_uc_addr_vf(struct fm10k_hw *hw, u16 glort,
-				   const u8 *mac, u16 vid, bool add, u8 flags)
+static s32 fm10k_update_uc_addr_vf(struct fm10k_hw *hw,
+				   u16 __always_unused glort,
+				   const u8 *mac, u16 vid, bool add,
+				   u8 __always_unused flags)
 {
 	struct fm10k_mbx_info *mbx = &hw->mbx;
 	u32 msg[7];
@@ -309,7 +311,8 @@ static s32 fm10k_update_uc_addr_vf(struct fm10k_hw *hw, u16 glort,
  *  This function is used to add or remove multicast MAC addresses for
  *  the VF.
  **/
-static s32 fm10k_update_mc_addr_vf(struct fm10k_hw *hw, u16 glort,
+static s32 fm10k_update_mc_addr_vf(struct fm10k_hw *hw,
+				   u16 __always_unused glort,
 				   const u8 *mac, u16 vid, bool add)
 {
 	struct fm10k_mbx_info *mbx = &hw->mbx;
@@ -373,7 +376,7 @@ const struct fm10k_tlv_attr fm10k_lport_state_msg_attr[] = {
  *  are ready to bring up the interface.
  **/
 s32 fm10k_msg_lport_state_vf(struct fm10k_hw *hw, u32 **results,
-			     struct fm10k_mbx_info *mbx)
+			     struct fm10k_mbx_info __always_unused *mbx)
 {
 	hw->mac.dglort_map = !results[FM10K_LPORT_STATE_MSG_READY] ?
 			     FM10K_DGLORTMAP_NONE : FM10K_DGLORTMAP_ZERO;
@@ -392,8 +395,9 @@ s32 fm10k_msg_lport_state_vf(struct fm10k_hw *hw, u32 **results,
  *  enabled we can add filters, if it is disabled all filters for this
  *  logical port are flushed.
  **/
-static s32 fm10k_update_lport_state_vf(struct fm10k_hw *hw, u16 glort,
-				       u16 count, bool enable)
+static s32 fm10k_update_lport_state_vf(struct fm10k_hw *hw,
+				       u16 __always_unused glort,
+				       u16 __always_unused count, bool enable)
 {
 	struct fm10k_mbx_info *mbx = &hw->mbx;
 	u32 msg[2];
@@ -420,7 +424,8 @@ static s32 fm10k_update_lport_state_vf(struct fm10k_hw *hw, u16 glort,
  *  so that it can enable either multicast, multicast promiscuous, or
  *  promiscuous mode of operation.
  **/
-static s32 fm10k_update_xcast_mode_vf(struct fm10k_hw *hw, u16 glort, u8 mode)
+static s32 fm10k_update_xcast_mode_vf(struct fm10k_hw *hw,
+				      u16 __always_unused glort, u8 mode)
 {
 	struct fm10k_mbx_info *mbx = &hw->mbx;
 	u32 msg[3];
@@ -475,7 +480,7 @@ static void fm10k_rebind_hw_stats_vf(struct fm10k_hw *hw,
  *  that information to then populate a DGLORTMAP/DEC entry and the queues
  *  to which it has been assigned.
  **/
-static s32 fm10k_configure_dglort_map_vf(struct fm10k_hw *hw,
+static s32 fm10k_configure_dglort_map_vf(struct fm10k_hw __always_unused *hw,
 					 struct fm10k_dglort_cfg *dglort)
 {
 	/* verify the dglort pointer */
-- 
2.21.0

[net-next 7/8] fm10k: convert NON_Q_VECTORS(hw) into NON_Q_VECTORS

[Jeff Kirsher]

From: Jacob Keller <jacob.e.keller@intel.com>

The driver currently uses a macro to decide whether we should use
NON_Q_VECTORS_PF or NON_Q_VECTORS_VF.

However, we also define NON_Q_VECTORS_VF to the same value as
NON_Q_VECTORS_PF. This means that the macro NON_Q_VECTORS(hw) will
always return the same value.

Let's just remove this macro, and replace it directly with an enum value
on the enum non_q_vectors.

This was detected by cppcheck and fixes the following warnings when
building with BUILD=KERNEL

[fm10k_ethtool.c:1123]: (style) Same value in both branches of ternary
operator.

[fm10k_ethtool.c:1142]: (style) Same value in both branches of ternary
operator.

[fm10k_main.c:1826]: (style) Same value in both branches of ternary
operator.

[fm10k_main.c:1849]: (style) Same value in both branches of ternary
operator.

[fm10k_main.c:1858]: (style) Same value in both branches of ternary
operator.

[fm10k_pci.c:901]: (style) Same value in both branches of ternary
operator.

[fm10k_pci.c:1040]: (style) Same value in both branches of ternary
operator.

[fm10k_pci.c:1726]: (style) Same value in both branches of ternary
operator.

[fm10k_pci.c:1763]: (style) Same value in both branches of ternary
operator.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/fm10k/fm10k.h         | 10 +++-------
 drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c |  6 ++----
 drivers/net/ethernet/intel/fm10k/fm10k_main.c    |  4 ++--
 drivers/net/ethernet/intel/fm10k/fm10k_pci.c     |  9 ++++-----
 4 files changed, 11 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k.h b/drivers/net/ethernet/intel/fm10k/fm10k.h
index 7d42582ed48d..b14441944b4b 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k.h
+++ b/drivers/net/ethernet/intel/fm10k/fm10k.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright(c) 2013 - 2018 Intel Corporation. */
+/* Copyright(c) 2013 - 2019 Intel Corporation. */
 
 #ifndef _FM10K_H_
 #define _FM10K_H_
@@ -177,14 +177,10 @@ static inline struct netdev_queue *txring_txq(const struct fm10k_ring *ring)
 #define MIN_Q_VECTORS	1
 enum fm10k_non_q_vectors {
 	FM10K_MBX_VECTOR,
-#define NON_Q_VECTORS_VF NON_Q_VECTORS_PF
-	NON_Q_VECTORS_PF
+	NON_Q_VECTORS
 };
 
-#define NON_Q_VECTORS(hw)	(((hw)->mac.type == fm10k_mac_pf) ? \
-						NON_Q_VECTORS_PF : \
-						NON_Q_VECTORS_VF)
-#define MIN_MSIX_COUNT(hw)	(MIN_Q_VECTORS + NON_Q_VECTORS(hw))
+#define MIN_MSIX_COUNT(hw)	(MIN_Q_VECTORS + NON_Q_VECTORS)
 
 struct fm10k_q_vector {
 	struct fm10k_intfc *interface;
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c b/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c
index 1f7e4a8f4557..c681d2d28107 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c
@@ -1114,13 +1114,12 @@ static void fm10k_get_channels(struct net_device *dev,
 			       struct ethtool_channels *ch)
 {
 	struct fm10k_intfc *interface = netdev_priv(dev);
-	struct fm10k_hw *hw = &interface->hw;
 
 	/* report maximum channels */
 	ch->max_combined = fm10k_max_channels(dev);
 
 	/* report info for other vector */
-	ch->max_other = NON_Q_VECTORS(hw);
+	ch->max_other = NON_Q_VECTORS;
 	ch->other_count = ch->max_other;
 
 	/* record RSS queues */
@@ -1132,14 +1131,13 @@ static int fm10k_set_channels(struct net_device *dev,
 {
 	struct fm10k_intfc *interface = netdev_priv(dev);
 	unsigned int count = ch->combined_count;
-	struct fm10k_hw *hw = &interface->hw;
 
 	/* verify they are not requesting separate vectors */
 	if (!count || ch->rx_count || ch->tx_count)
 		return -EINVAL;
 
 	/* verify other_count has not changed */
-	if (ch->other_count != NON_Q_VECTORS(hw))
+	if (ch->other_count != NON_Q_VECTORS)
 		return -EINVAL;
 
 	/* verify the number of channels does not exceed hardware limits */
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_main.c b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
index 17a96a49174b..e0a2be534b20 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_main.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
@@ -1824,7 +1824,7 @@ static int fm10k_init_msix_capability(struct fm10k_intfc *interface)
 	v_budget = min_t(u16, v_budget, num_online_cpus());
 
 	/* account for vectors not related to queues */
-	v_budget += NON_Q_VECTORS(hw);
+	v_budget += NON_Q_VECTORS;
 
 	/* At the same time, hardware can only support a maximum of
 	 * hw.mac->max_msix_vectors vectors.  With features
@@ -1856,7 +1856,7 @@ static int fm10k_init_msix_capability(struct fm10k_intfc *interface)
 	}
 
 	/* record the number of queues available for q_vectors */
-	interface->num_q_vectors = v_budget - NON_Q_VECTORS(hw);
+	interface->num_q_vectors = v_budget - NON_Q_VECTORS;
 
 	return 0;
 }
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
index 73928dbe714f..bb236fa44048 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
@@ -898,7 +898,7 @@ static void fm10k_configure_tx_ring(struct fm10k_intfc *interface,
 
 	/* Map interrupt */
 	if (ring->q_vector) {
-		txint = ring->q_vector->v_idx + NON_Q_VECTORS(hw);
+		txint = ring->q_vector->v_idx + NON_Q_VECTORS;
 		txint |= FM10K_INT_MAP_TIMER0;
 	}
 
@@ -1037,7 +1037,7 @@ static void fm10k_configure_rx_ring(struct fm10k_intfc *interface,
 
 	/* Map interrupt */
 	if (ring->q_vector) {
-		rxint = ring->q_vector->v_idx + NON_Q_VECTORS(hw);
+		rxint = ring->q_vector->v_idx + NON_Q_VECTORS;
 		rxint |= FM10K_INT_MAP_TIMER1;
 	}
 
@@ -1720,10 +1720,9 @@ int fm10k_mbx_request_irq(struct fm10k_intfc *interface)
 void fm10k_qv_free_irq(struct fm10k_intfc *interface)
 {
 	int vector = interface->num_q_vectors;
-	struct fm10k_hw *hw = &interface->hw;
 	struct msix_entry *entry;
 
-	entry = &interface->msix_entries[NON_Q_VECTORS(hw) + vector];
+	entry = &interface->msix_entries[NON_Q_VECTORS + vector];
 
 	while (vector) {
 		struct fm10k_q_vector *q_vector;
@@ -1760,7 +1759,7 @@ int fm10k_qv_request_irq(struct fm10k_intfc *interface)
 	unsigned int ri = 0, ti = 0;
 	int vector, err;
 
-	entry = &interface->msix_entries[NON_Q_VECTORS(hw)];
+	entry = &interface->msix_entries[NON_Q_VECTORS];
 
 	for (vector = 0; vector < interface->num_q_vectors; vector++) {
 		struct fm10k_q_vector *q_vector = interface->q_vector[vector];
-- 
2.21.0

[net-next 8/8] fm10k: fix fm10k_get_fault_pf to read correct address

[Jeff Kirsher]

From: Jacob Keller <jacob.e.keller@intel.com>

Fix assignment of the FM10K_FAULT_ADDR_LO register into fault->address
by using a bit-wise |= operation. Without this, the low address is
completely overwriting the high potion of the address. This caused the
fault to incorrectly return only the lower 32 bits of the fault address.

This issue was detected by cppcheck and resolves the following warnings
produced by that tool:

[fm10k_pf.c:1668] -> [fm10k_pf.c:1670]: (style) Variable
'fault->address' is reassigned a value before the old one has been used.

[fm10k_pf.c:1669] -> [fm10k_pf.c:1670]: (style) Variable
'fault->address' is reassigned a value before the old one has been used.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/fm10k/fm10k_pf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
index 095c5b0e4096..be07bfdb0bb4 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
@@ -1565,7 +1565,7 @@ static s32 fm10k_get_fault_pf(struct fm10k_hw *hw, int type,
 	/* read remaining fields */
 	fault->address = fm10k_read_reg(hw, type + FM10K_FAULT_ADDR_HI);
 	fault->address <<= 32;
-	fault->address = fm10k_read_reg(hw, type + FM10K_FAULT_ADDR_LO);
+	fault->address |= fm10k_read_reg(hw, type + FM10K_FAULT_ADDR_LO);
 	fault->specinfo = fm10k_read_reg(hw, type + FM10K_FAULT_SPECINFO);
 
 	/* clear valid bit to allow for next error */
-- 
2.21.0

Re: [net-next 0/8][pull request] 100GbE Intel Wired LAN Driver Updates 2019-08-04

[Jakub Kicinski]

On Sun,  4 Aug 2019 04:59:18 -0700, Jeff Kirsher wrote:
> This series contains more updates to fm10k from Jake Keller.
> 
> Jake removes the unnecessary initialization of some variables to help
> resolve static code checker warnings.  Explicitly return success during
> resume, since the value of 'err' is always success.  Fixed a issue with
> incrementing a void pointer, which can produce undefined behavior.  Used
> the __always_unused macro for function templates that are passed as
> parameters in functions, but are not used.  Simplified the code by
> removing an unnecessary macro in determining the value of NON_Q_VECTORS.
> Fixed an issue, using bitwise operations to prevent the low address
> overwriting the high portion of the address.

Looks good. AFAIK void pointer arithmetic is not uncommon in the
kernel, but shouldn't hurt to fix it.

Do you guys have any plans to fix W=1 C=1 build for Intel drivers?
That'd be very nice :)

Re: [net-next 0/8][pull request] 100GbE Intel Wired LAN Driver Updates 2019-08-04

[David Miller]

From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Sun,  4 Aug 2019 04:59:18 -0700

> This series contains more updates to fm10k from Jake Keller.
> 
> Jake removes the unnecessary initialization of some variables to help
> resolve static code checker warnings.  Explicitly return success during
> resume, since the value of 'err' is always success.  Fixed a issue with
> incrementing a void pointer, which can produce undefined behavior.  Used
> the __always_unused macro for function templates that are passed as
> parameters in functions, but are not used.  Simplified the code by
> removing an unnecessary macro in determining the value of NON_Q_VECTORS.
> Fixed an issue, using bitwise operations to prevent the low address
> overwriting the high portion of the address.

Pulled, thanks Jeff.