Re: [PATCH] PCI PM: Fix handling of devices without PM support bypci_target_state()
From: Jesse Barnes
Date: Tue Jun 16 2009 - 15:18:38 EST
On Sun, 14 Jun 2009 21:25:02 +0200
"Rafael J. Wysocki" <rjw@xxxxxxx> wrote:
> From: Rafael J. Wysocki <rjw@xxxxxxx>
> 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@xxxxxxx>
> 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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