linux-kernel - Re: Acpi deadlocks with 3.7.0-rc4

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Message-ID: <1658287.3KNDf2oyAg@vostro.rjw.lan>
Date:	Thu, 29 Nov 2012 11:09:36 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	linux-acpi@...r.kernel.org
Cc:	Zdenek Kabelac <zkabelac@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Acpi deadlocks with 3.7.0-rc4

On Thursday, November 29, 2012 10:03:53 AM Zdenek Kabelac wrote:
> Dne 28.11.2012 21:31, Rafael J. Wysocki napsal(a):
> > On Wednesday, November 28, 2012 06:27:50 PM Zdenek Kabelac wrote:
> >> Dne 28.11.2012 18:02, Linus Torvalds napsal(a):
> >>> On Wed, Nov 28, 2012 at 8:21 AM, Zdenek Kabelac <zkabelac@...hat.com> wrote:
> >>>>
> >>>> I've opened  https://bugzilla.kernel.org/show_bug.cgi?id=51071
> >>>> and attached picture there which is all I have.
> >
> > I wonder if you can try to apply the patch below and see if that makes any
> > difference?
> >
> 
> Yep - extended BZ with 2 new pictures - it's now crashing earlier within
> the call of acpi_bus_get_device().

Pretty much as expected.

So this is the problem I was thinking it was: the previous suspend-resume
cycle unregistered the struct acpi_device pointed to by dev->data in
pnpacpi_build_resource_template(), so the handle pointer in there is now
invalid.

Thanks,
Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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