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| author |   Michael Chan <michael.chan@broadcom.com> | 2021-08-31 21:15:23 -0400 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-09-01 10:37:05 +0100 |
| commit | c6132f6f2e682c958f7022ecfd8bec35723a1a9d (patch) | |
| tree | 40c40646fc415b563589a9737c40bb8a1a23c370 /drivers/net/ethernet/broadcom/bnxt/bnxt.c | |
| parent | Merge tag 'net-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next (diff) | |
| download | linux-dev-c6132f6f2e682c958f7022ecfd8bec35723a1a9d.tar.xz linux-dev-c6132f6f2e682c958f7022ecfd8bec35723a1a9d.zip | |
bnxt_en: Fix 64-bit doorbell operation on 32-bit kernels
The driver requires 64-bit doorbell writes to be atomic on 32-bit
architectures. So we redefined writeq as a new macro with spinlock
protection on 32-bit architectures. This created a new warning when
we added a new file in a recent patchset. writeq is defined on many
32-bit architectures to do the memory write non-atomically and it
generated a new macro redefined warning. This warning was fixed
incorrectly in the recent patch.
Fix this properly by adding a new bnxt_writeq() function that will
do the non-atomic write under spinlock on 32-bit systems. All callers
in the driver will now call bnxt_writeq() instead.
v2: Need to pass in bp to bnxt_writeq()
Use lo_hi_writeq() [suggested by Florian]
Reported-by: kernel test robot <lkp@intel.com>
Fixes: f9ff578251dc ("bnxt_en: introduce new firmware message API based on DMA pools")
Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnxt/bnxt.c')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 627f85ee3922..acaf1e0f049e 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -305,13 +305,15 @@ static bool bnxt_vf_pciid(enum board_idx idx) writel(DB_CP_FLAGS | RING_CMP(idx), (db)->doorbell) #define BNXT_DB_NQ_P5(db, idx) \ - writeq((db)->db_key64 | DBR_TYPE_NQ | RING_CMP(idx), (db)->doorbell) + bnxt_writeq(bp, (db)->db_key64 | DBR_TYPE_NQ | RING_CMP(idx), \ + (db)->doorbell) #define BNXT_DB_CQ_ARM(db, idx) \ writel(DB_CP_REARM_FLAGS | RING_CMP(idx), (db)->doorbell) #define BNXT_DB_NQ_ARM_P5(db, idx) \ - writeq((db)->db_key64 | DBR_TYPE_NQ_ARM | RING_CMP(idx), (db)->doorbell) + bnxt_writeq(bp, (db)->db_key64 | DBR_TYPE_NQ_ARM | RING_CMP(idx),\ + (db)->doorbell) static void bnxt_db_nq(struct bnxt *bp, struct bnxt_db_info *db, u32 idx) { @@ -332,8 +334,8 @@ static void bnxt_db_nq_arm(struct bnxt *bp, struct bnxt_db_info *db, u32 idx) static void bnxt_db_cq(struct bnxt *bp, struct bnxt_db_info *db, u32 idx) { if (bp->flags & BNXT_FLAG_CHIP_P5) - writeq(db->db_key64 | DBR_TYPE_CQ_ARMALL | RING_CMP(idx), - db->doorbell); + bnxt_writeq(bp, db->db_key64 | DBR_TYPE_CQ_ARMALL | + RING_CMP(idx), db->doorbell); else BNXT_DB_CQ(db, idx); } @@ -2638,8 +2640,8 @@ static void __bnxt_poll_cqs_done(struct bnxt *bp, struct bnxt_napi *bnapi, if (cpr2 && cpr2->had_work_done) { db = &cpr2->cp_db; - writeq(db->db_key64 | dbr_type | - RING_CMP(cpr2->cp_raw_cons), db->doorbell); + bnxt_writeq(bp, db->db_key64 | dbr_type | + RING_CMP(cpr2->cp_raw_cons), db->doorbell); cpr2->had_work_done = 0; } } |