linux-kernel - Re: [PATCH 3/7] PCI PM: Fix saving of device state in pci_legacy

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Date:	Wed, 4 Feb 2009 13:56:46 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.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 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.

		Linus
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