Subject: [PATCH 11/32] mlx4: do not call napi_schedule() without care

From: Eric Dumazet <[email-masked]>
Date: Fri, 13 Jan 2017 08:39:24 -0800

[ Upstream commit 8cf699ec849f4ca1413cea01289bd7d37dbcc626 ]

Disable BH around the call to napi_schedule() to avoid following warning

[   52.095499] NOHZ: local_softirq_pending 08
[   52.421291] NOHZ: local_softirq_pending 08
[   52.608313] NOHZ: local_softirq_pending 08

Fixes: 8d59de8f7bb3 ("net/mlx4_en: Process all completions in RX rings after port goes up")
Signed-off-by: Eric Dumazet <[email-masked]>
Cc: Erez Shitrit <[email-masked]>
Cc: Eugenia Emantayev <[email-masked]>
Cc: Tariq Toukan <[email-masked]>
Acked-by: Tariq Toukan <[email-masked]>
Signed-off-by: David S. Miller <[email-masked]>
---
 drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index fb8bb02..d223e7c 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -1740,8 +1740,11 @@ int mlx4_en_start_port(struct net_device *dev)
 	/* Process all completions if exist to prevent
 	 * the queues freezing if they are full
 	 */
-	for (i = 0; i < priv->rx_ring_num; i++)
+	for (i = 0; i < priv->rx_ring_num; i++) {
+		local_bh_disable();
 		napi_schedule(&priv->rx_cq[i]->napi);
+		local_bh_enable();
+	}
 
 	netif_tx_start_all_queues(dev);
 	netif_device_attach(dev);
-- 
2.4.11