From: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Date: Fri, 3 Aug 2012 00:38:37 +0000 (+0000)
Subject: net/mlx4_en: Fixing TX queue stop/wake flow
X-Git-Tag: v3.6-rc2~24^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c18520bd1b244fe8e3ac5358137321780a70d6e7;p=pandora-kernel.git

net/mlx4_en: Fixing TX queue stop/wake flow

Removing the ring->blocked flag, it is redundant and leads to a race:

We close the TX queue and then set the "blocked" flag.
Between those 2 operations the completion function can check the "blocked"
flag, sees that it is 0, and wouldn't open the TX queue.

Using netif_tx_queue_stopped to check the state of the queue to avoid this race.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
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