netdev - [PATCH 12/13] forcedeth: fix irq clearing and napi spin lock changes

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Message-ID: <49B013BA.2040202@nvidia.com>
Date:	Thu, 05 Mar 2009 13:02:34 -0500
From:	Ayaz Abdulla <aabdulla@...dia.com>
To:	Jeff Garzik <jgarzik@...ox.com>,
	Manfred Spraul <manfred@...orfullife.com>,
	Andrew Morton <akpm@...l.org>,
	"David S. Miller" <davem@...emloft.net>,
	nedev <netdev@...r.kernel.org>
Subject: [PATCH 12/13] 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@...dia.com>

View attachment "patch-forcedeth-irq" of type "text/plain" (1972 bytes)