netdev - [PATCH net-next] net/mlx4_en: mlx4_en_netpoll() should schedule TX, not RX

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Message-ID: <1464979969.5939.200.camel@edumazet-glaptop3.roam.corp.google.com>
Date:	Fri, 03 Jun 2016 11:52:49 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Tariq Toukan <ttoukan.linux@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Maciej Żenczykowski <maze@...gle.com>
Cc:	Eric Dumazet <edumazet@...gle.com>,
	"David S . Miller" <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Willem de Bruijn <willemb@...gle.com>,
	Eugenia Emantayev <eugenia@...lanox.com>
Subject: [PATCH net-next] net/mlx4_en: mlx4_en_netpoll() should schedule TX,
 not RX

From: Eric Dumazet <edumazet@...gle.com>

I am not sure mlx4_en_netpoll() is doing anything useful right now.

mlx4 has different NAPI structures for RX and TX, and netpoll only wants
to drain TX queues.

Lets schedule NAPI polls on TX, not RX.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Cc: Maciej Żenczykowski <maze@...gle.com>
Cc: Eric W. Biederman <ebiederm@...ssion.com>
---
Totally untested patch, I would appreciate some feedback before merge,
thanks !

 drivers/net/ethernet/mellanox/mlx4/en_netdev.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 19ceced6736c..973391bfe286 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -1197,8 +1197,8 @@ static void mlx4_en_netpoll(struct net_device *dev)
 	struct mlx4_en_cq *cq;
 	int i;
 
-	for (i = 0; i < priv->rx_ring_num; i++) {
-		cq = priv->rx_cq[i];
+	for (i = 0; i < priv->tx_ring_num; i++) {
+		cq = priv->tx_cq[i];
 		napi_schedule(&cq->napi);
 	}
 }