linux-kernel - Re: [BUG] sdhci regression in 2.6.21-rc2

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Date:	Mon, 05 Mar 2007 16:23:53 +0100
From:	Pierre Ossman <drzeus-list@...eus.cx>
To:	Mark Lord <lkml@....ca>
CC:	sdhci-devel@...t.drzeus.cx, Adrian Bunk <bunk@...sta.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] sdhci regression in 2.6.21-rc2

Pierre Ossman wrote:
> Mark Lord wrote:
>> But.. in the middle of all of this, we now see the SHDCI code
>> trying to talk to its as-yet-not-restored device, and being rather
>> noisy about it all:
>>
> 
> Not quite. I'd say it's the kernel calling the interrupt handler of a
> currently sleeping device. Since we're seeing this problem I assume the
> kernel's interrupt code isn't aware of PM states?
> 

Hmm... I guess it can't be as the interrupt handler isn't associated with a
device, just a random pointer.

So either release the interrupt (which seems a bit unsafe as then we might not
get it back), or handle states at the start of the isr.

Rgds
-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  PulseAudio, core developer          http://pulseaudio.org
  rdesktop, core developer          http://www.rdesktop.org
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