From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Mon, 5 Sep 2011 07:58:29 +0000 (+0100)
Subject: NET: am79c961: fix race in link status code
X-Git-Tag: v3.1-rc6~10^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1df726ef0a700587a712a3660b2caa8e533c7de9;p=pandora-kernel.git

NET: am79c961: fix race in link status code

The link status code operates from a timer, and writes the index
register without first taking a lock.  A well-placed interrupt
between writing the index register and reading the data register
could change the index register on us, which will return wrong data.
Add the necessary lock.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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