From: andrea.merello <andrea.merello@gmail.com>
Date: Wed, 5 Feb 2014 21:38:06 +0000 (+0100)
Subject: rtl8180: Add error check for pci_map_single return value in TX path
X-Git-Tag: v3.14-rc3~36^2~27^2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=348f7d4adee97f222e3ad9ff97956ca3793d11c6;p=pandora-kernel.git

rtl8180: Add error check for pci_map_single return value in TX path

Orignal code will not detect a DMA mapping failure, causing the HW
to attempt a DMA from an invalid address.

This patch add the error check and eventually simply drops the TX
packet if we can't map it for DMA.

Signed-off-by: andrea merello <andrea.merello@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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