From: Ayaz Abdulla <aabdulla@nvidia.com>
Date: Thu, 5 Mar 2009 08:02:34 +0000 (+0000)
Subject: forcedeth: fix irq clearing and napi spin lock changes
X-Git-Tag: v2.6.30-rc1~662^2~271
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b2bb76f575699eff3f58b18dcfebf5d3b1f6ddb;p=pandora-kernel.git

forcedeth: fix irq clearing and napi spin lock changes

This patch clears the irqstatus register with the exact same events it
has read from it. Since the read-write operation is not atomic, a new
irqstatus bit could have been set in between these operations and would
then be cleared accidentally.

Secondly, we now don't need any spin lock protection when
scheduling/completing napi poll as the isr will not execute anymore (as
we turn off all interrupts now).

Signed-off-by: Ayaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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