linux-kernel - Re: linux-next: Tree for Apr 26 [ bluetooth on suspend/resume ]

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Date:	Sat, 27 Apr 2013 01:24:48 +0200
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-bluetooth@...r.kernel.org,
	Marcel Holtmann <marcel@...tmann.org>,
	Gustavo Padovan <gustavo@...ovan.org>,
	Johan Hedberg <johan.hedberg@...il.com>,
	Linux PM List <linux-pm@...ts.linux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: linux-next: Tree for Apr 26 [ bluetooth on suspend/resume ]

On Sat, Apr 27, 2013 at 12:04 AM, Tejun Heo <tj@...nel.org> wrote:
> On Fri, Apr 26, 2013 at 11:07:44PM +0200, Sedat Dilek wrote:
>> > The second argument %rsi is zero, which got transferred to %r13 and
>> > then offset deref on it trapped.
>> >
>> > The second argument is @wq and the oopsing code is the wq->flags deref
>> > in the following if condition.
>> >
>> >         /* if dying, only works from the same workqueue are allowed */
>> >         if (unlikely(wq->flags & __WQ_DRAINING) &&
>> >                 WARN_ON_ONCE(!is_chained_work(wq)))
>> >                 return;
>> >
>> > So, umm, don't pass in NULL as @wq. :)
>> >
>>
>> Do you have a patch for this?
>
> Heh, I haven't even looked at the caller.  It's a bug on the workqueue
> user side.
>

[ CC Frederic ]

You should explain that a bit.

I have tested with my "problematic -3" kernel and did not see the warning again.
So, I assume it's independent of linux-dynticks kconfig-settings.

- Sedat -

> Thanks.
>
> --
> tejun
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