From: Amir Vadai <amirv@mellanox.com>
Date: Wed, 30 Jan 2013 23:07:11 +0000 (+0000)
Subject: net/mlx4_en: Fix transmit timeout when driver restarts port
X-Git-Tag: v3.9-rc1~139^2~198^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3484aac16149636f0ba5b5b0789a2918c682db7e;p=pandora-kernel.git

net/mlx4_en: Fix transmit timeout when driver restarts port

Under heavy CPU load, changing, ring size/mtu/etc. could result in transmit
timeout, since stop-start port might take more than 10 seconds.
Calling netif_detach_device to prevent tx queue transmit timeout.

netif_detach_device() is not called under ndo_stop, because netif_carrier_off
will prevent the timeout, and device should not be marked as not present, or
else user won't be able to start it later on.

CC: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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