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Message-Id: <1233794410.4612.34.camel@pasglop>
Date: Thu, 05 Feb 2009 11:40:10 +1100
From: Benjamin Herrenschmidt <benh@...nel.crashing.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Frans Pop <elendil@...net.nl>, rjw@...k.pl,
jbarnes@...tuousgeek.org, linux-pm@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 3/7] PCI PM: Fix saving of device state in
pci_legacy_suspend
On Wed, 2009-02-04 at 13:56 -0800, Linus Torvalds wrote:
>
> On Thu, 5 Feb 2009, Benjamin Herrenschmidt wrote:
> >
> > How so ? I've had such backtraces with no other info in my log...
>
> _with_ that patch?
>
> It very much replaces a warning with no further info with
>
> + WARN_ONCE(pci_dev->current_state != prev,
> + "PCI PM: Device state not saved by %pF\n",
> + drv->suspend);
>
> And notice the "%pF" and the 'drv->suspend': it should tell you exactly
> which suspend routine it was that messed up.
Yup, missed that change in the patch. In fact, I even missed the
existence of a WARN_ONCE that takes those text arguments... baaaah. I
suppose I should try to read more of lkml :-)
Cheers,
Ben.
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