From: Neil Horman <nhorman@tuxdriver.com>
Date: Fri, 26 Jul 2013 16:47:14 +0000 (-0400)
Subject: atl1c: Fix misuse of netdev_alloc_skb in refilling rx ring
X-Git-Tag: v3.11-rc4~22^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ebe7fdbaf3e90ea22feade6c9f5e50f42b23b6d8;p=pandora-kernel.git

atl1c: Fix misuse of netdev_alloc_skb in refilling rx ring

atl1c uses netdev_alloc_skb to refill its rx dma ring, but that call makes no
guarantees about the suitability of the memory for use in DMA.  As a result
we've gotten reports of atl1c drivers occasionally hanging and needing to be
reset:
https://bugzilla.kernel.org/show_bug.cgi?id=54021

Fix this by modifying the call to use the internal version __netdev_alloc_skb,
where you can set the gfp_mask explicitly to include GFP_DMA.

Tested by two reporters in the above bug, who have the hardware to validate it.
Both report immediate cessation of the problem with this patch

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Jay Cliburn <jcliburn@gmail.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: stable@vger.kernel.org
Tested-by: Luis Henriques <luis.henriques@canonical.com>
Tested-by: Vincent Alquier <vincent.alquier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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