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From: Chris Ball <cjb@laptop.org>
To: Valdis.Kletnieks@vt.edu
Cc: akpm@linux-foundation.org, Richard Purdie <rpurdie@rpsys.net>,
	Hein_Tibosch <hein_tibosch@yahoo.es>,
	linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org
Subject: Re: mmotm 2010-09-15 - BUG in mmc driver calling led_trigger_event()
Date: Wed, 22 Sep 2010 04:14:53 +0100	[thread overview]
Message-ID: <20100922031452.GA4862@void.printf.net> (raw)
In-Reply-To: <8581.1285124507@localhost>

Hi Valdis,

On Tue, Sep 21, 2010 at 11:01:47PM -0400, Valdis.Kletnieks@vt.edu wrote:
> [    2.934051] BUG: sleeping function called from invalid context at kernel/mutex.c:278
> [    2.934440] in_atomic(): 1, irqs_disabled(): 0, pid: 11, name: kworker/0:1
>
> [...]
> 
> Anything obvious to you guys? Race condition of some sort, or somebody
> else leaving a dangling in_atomic() status for us to get ambushed by?
> Maybe Hein's patches to retry at multiple freqs are causing one of the
> retries to happen at a bad time? I'm mystified.

This is caused by Anton Vorontsov's patchset here:
   http://lkml.org/lkml/2010/7/14/127

I reported the same symptom:
   http://lkml.org/lkml/2010/9/8/435

and suggested that Andrew remove the patchset from -mm while we work out
the bugs.

Thanks,

-- 
Chris Ball   <cjb@laptop.org>   <http://printf.net/>
One Laptop Per Child

  reply	other threads:[~2010-09-22  3:15 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-15 23:21 mmotm 2010-09-15-16-21 uploaded akpm
2010-09-22  3:01 ` mmotm 2010-09-15 - BUG in mmc driver calling led_trigger_event() Valdis.Kletnieks
2010-09-22  3:14   ` Chris Ball [this message]
2010-09-22  3:17   ` Andrew Morton
2010-09-22  6:32     ` Anton Vorontsov

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