[PATCH net-next] net/mlx4_core: A write memory barrier is sufficient in EQ ci update

[Tariq Toukan]

Soften the memory barrier call of mb() by a sufficient wmb() in the
consumer index update of the event queues.

Suggested-by: Eric Dumazet <eduma...@google.com>
Signed-off-by: Tariq Toukan <tar...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx4/eq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/eq.c 
b/drivers/net/ethernet/mellanox/mlx4/eq.c
index 4953c852c247..56395aa04ca1 100644
--- a/drivers/net/ethernet/mellanox/mlx4/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/eq.c
@@ -100,7 +100,7 @@ static void eq_set_ci(struct mlx4_eq *eq, int req_not)
                                               req_not << 31),
                     eq->doorbell);
        /* We still want ordering, just not swabbing, so add a barrier */
-       mb();
+       wmb();
 }
 
 static struct mlx4_eqe *get_eqe(struct mlx4_eq *eq, u32 entry, u8 eqe_factor,
-- 
1.8.3.1