linux-kernel - Re: [REGRESSION] b8b2c7d845 breaks suspend/resume in qemu

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Message-ID: <20151202205745.GA28256@kroah.com>
Date:	Wed, 2 Dec 2015 12:57:45 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	John Stultz <john.stultz@...aro.org>, martin.wilck@...fujitsu.com
Cc:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [REGRESSION] b8b2c7d845 breaks suspend/resume in qemu

On Wed, Dec 02, 2015 at 12:46:10PM -0800, John Stultz wrote:
> On Wed, Dec 2, 2015 at 12:39 PM, John Stultz <john.stultz@...aro.org> wrote:
> > Hey Uwe,
> >
> > So I recently noticed that my alarmtimer suspend/resume tests
> > (selftests/timers/alartimer-suspend.c) were getting stuck testing w/
> > 4.4-rc kernels when running under qemu (x86_64).
> >
> > I've bisected this back to: b8b2c7d845 (base/platform: assert that
> > dev_pm_domain callbacks are called unconditionally).
> >
> > I've not yet spent done any further analysis (bisecting it down, after
> > some user-error, ate up my morning). But I wanted to see if there were
> > any initial suggestions for solving this.
> 
> Just one other quick note: Reverting this commit against 4.4-rc3 seems
> to work as well.

There's a proposed patch to resolve this on the mailing list, "Subject:
[PATCH] base/platform: fix panic when probe function is NULL" from
Martin, but I think he's going to send me an updated version before I
forward it on to Linus.

It should resolve your issue, can you verify that?

thanks,

greg k-h

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