netdev - Re: [PATCH] mv643xx_eth: prevent interrupt storm on ifconfig down

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Date:	Mon, 19 Jan 2009 17:18:19 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	buytenh@...tstofly.org
Cc:	tbm@...ius.com, pacman@...h.dhis.org, netdev@...r.kernel.org,
	matt@...esi-usa.com, paubert@...m.es
Subject: Re: [PATCH] mv643xx_eth: prevent interrupt storm on ifconfig down

From: Lennert Buytenhek <buytenh@...tstofly.org>
Date: Mon, 19 Jan 2009 11:09:21 +0100

> From: Gabriel Paubert <paubert@...m.es>
> 
> Contrary to what the docs say, the 'extended interrupt cause' bit in
> the interrupt cause register (bit 1) appears to not be maskable on at
> least some of the mv643xx_eth platforms, making writing zeroes to the
> interrupt mask register but not the extended interrupt mask register
> insufficient to stop interrupts from occuring.  Therefore, also write
> zeroes to the extended interrupt mask register when shutting down the
> port.
> 
> This fixes the interrupt storm seen on the Pegasos board when shutting
> down the interface.
> 
> Signed-off-by: Lennert Buytenhek <buytenh@...vell.com>

Also applied, thanks.
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