From: Eric Dumazet <edumazet@google.com>
Date: Wed, 16 Nov 2016 13:49:22 +0000 (-0800)
Subject: net/mlx4_en: remove napi_hash_del() call
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=bb07fafaec70183f1dcd3d4a1459abbc409753e2;p=openwrt%2Fstaging%2Fblogic.git

net/mlx4_en: remove napi_hash_del() call

There is no need calling napi_hash_del()+synchronize_rcu() before
calling netif_napi_del()

netif_napi_del() does this already.

Using napi_hash_del() in a driver is useful only when dealing with
a batch of NAPI structures, so that a single synchronize_rcu() can
be used. mlx4_en_deactivate_cq() is deactivating a single NAPI.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_cq.c b/drivers/net/ethernet/mellanox/mlx4/en_cq.c
index 03f05c4d1f98..09dd3776db76 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_cq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_cq.c
@@ -185,10 +185,6 @@ void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq)
 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
 {
 	napi_disable(&cq->napi);
-	if (cq->type == RX) {
-		napi_hash_del(&cq->napi);
-		synchronize_rcu();
-	}
 	netif_napi_del(&cq->napi);
 
 	mlx4_cq_free(priv->mdev->dev, &cq->mcq);