From: Amir Vadai <amirv@mellanox.com>
Date: Wed, 21 Aug 2013 07:08:58 +0000 (+0300)
Subject: net/mlx4_en: Fix handling of dma_map failure
X-Git-Tag: v3.12-rc1~132^2~221
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=237a3a3b1544574ead3dc459063424de8c0319e0;p=pandora-kernel.git

net/mlx4_en: Fix handling of dma_map failure

Result of skb_frag_dma_map() and dma_map_single() wasn't checked.
Added a check and proper handling in case of failure.
Moved the mapping to the beginning of mlx4_en_xmit(), before updating
the ring data structure to make error handling easier.

Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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