linux-kernel - Re: intel_idle .. Was: __pm_runtime_resume() returns -1 Was: Regression in 2.6.36

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Date:	Sat, 23 Oct 2010 19:57:28 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Christian Ruediger Bahls <lkml@...52.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Len Brown <len.brown@...el.com>, linux-kernel@...r.kernel.org,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: intel_idle .. Was: __pm_runtime_resume() returns -1 Was: Regression in 2.6.36

On Saturday, October 23, 2010, Christian Ruediger Bahls wrote:
> [2010-10-23 01:58] Andrew Morton <akpm@...ux-foundation.org> wrote:
> > On Fri, 22 Oct 2010 15:38:01 +0200
> > Christian Bahls <lkml@...52.de> wrote:
> > > The regression seems to have been introduced by the merge:
> > >   92b4522f72916ff2675060e29e4b24cf26ab59ce
> > > 
> >
> > I suspect your bisection went wrong :(
> ...
> > It's really hard to see how that change could break the resume
> > operation.
> 
> you were right ..
> 
> btw: this is not resume but system boot .. either cold or warm
>  [pressing any button(even the power-button) makes the boot continue]
> 
> the failure has lots of different incarnations:
>  during booting it sometimes stalls:
>  on initializing the sata drive
>  while mounting/un-mounting the sata drive
>  or other obscure occasions (syncing drives/initializing hardware)
> 
> in later versions of the kernel it throws the 
>  "__pm_runtime_resume() returns -1"-warnings

Do you have CONFIG_PM_VERBOSE set in your .config by chance?

Rafael
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