From ec1da08dd721f53b97e792c749d236907c764932 Mon Sep 17 00:00:00 2001
From: andrea merello <andrea.merello@gmail.com>
Date: Sat, 22 Feb 2014 17:57:23 +0100
Subject: [PATCH] rtl818x: check for pci_map_single() success when initializing
 RX ring

During initialization a number of RX skbs are allocated and mapped
for DMA.
Currently if pci_map_single() fails, it will result in passing to the
HW a wrong DMA address (to write to!).

This patch adds check for this condition and eventually causes the
driver not to initialize, avoiding at least dangerous DMAs.

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