linux-kernel - Re: [BUG] cpufreq: sleeping function called from invalid context at kernel/workqueue.c:2811

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Message-ID: <20130207062743.GA4388@thinkpad.lan>
Date:	Thu, 7 Feb 2013 10:27:44 +0400
From:	Artem Savkov <artem.savkov@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	cpufreq@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Viresh Kumar <viresh.kumar@...aro.org>
Subject: Re: [BUG] cpufreq: sleeping function called from invalid context at
 kernel/workqueue.c:2811

On Thu, Feb 07, 2013 at 01:41:57AM +0100, Rafael J. Wysocki wrote:
> On Wednesday, February 06, 2013 10:11:25 PM Rafael J. Wysocki wrote:
> > On Thursday, February 07, 2013 12:25:13 AM Artem Savkov wrote:
> > > I get the following BUG on suspend using systemd-sleep(this doesn't
> > > happen with pm-suspend). This seems to be introduced by some of the
> > > Viresh's patches.
> > 
> > Which branch from which day?

The log is from linux-next-20130205, still reproducible on -20130206

> OK, I've reproduced it and the appended patch fixes it for me.  Can you please
> try it and report back?

I've tried the patch and the bug is still reproducible. I might be wrong
but it seems that the bug happens on first __cpufreq_remove_dev
call(CPU1) on __cpufreq_governor(data, CPUFREQ_GOV_STOP) call (line
~1050) but changes in your patch are all below that call.

-- 
Kind regards,
Artem
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