From: Ayaz Abdulla <aabdulla@nvidia.com>
Date: Thu, 05 Mar 2009 13:02:34 -0500

quoted text
> 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>

Applied.
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