linux-kernel - Re: [PATCH] PCI PM: Fix handling of devices without PM support by pci_target

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Date:	Tue, 16 Jun 2009 12:18:28 -0700
From:	Jesse Barnes <jesse.barnes@...el.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Linux PCI <linux-pci@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andreas Mohr <andim2@...rs.sourceforge.net>,
	pm list <linux-pm@...ts.linux-foundation.org>
Subject: Re: [PATCH] PCI PM: Fix handling of devices without PM support by
 pci_target_state()

On Sun, 14 Jun 2009 21:25:02 +0200
"Rafael J. Wysocki" <rjw@...k.pl> wrote:

> From: Rafael J. Wysocki <rjw@...k.pl>
> 
> If a PCI device is not power-manageable either by the platform, or
> with the help of the native PCI PM interface, pci_target_state() will
> return either PCI_D3hot, or PCI_POWER_ERROR for it, depending on
> whether or not the device is configured to wake up the system.  Alas,
> none of these return values is correct, because each of them causes
> pci_prepare_to_sleep() to return error code, although it should
> complete successfully in such a case.
> 
> Fix this problem by making pci_target_state() always return PCI_D0
> for devices that cannot be power managed.
> 
> Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
> ---
> Hi Jesse,
> 
> I think this is 2.6.31 material, probably -stable too.

Applied to my linux-next branch, thanks.

-- 
Jesse Barnes, Intel Open Source Technology Center
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