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SubjectRe: [PATCH] PCI / PM / Runtime: Make runtime PM of PCI devices inactive by default
On Sat, 27 Feb 2010 21:37:37 +0100
"Rafael J. Wysocki" <rjw@sisk.pl> wrote:

> From: Rafael J. Wysocki <rjw@sisk.pl>
>
> Make the run-time power management of PCI devices be inactive by
> default by calling pm_runtime_forbid() for each PCI device during its
> initialization. This setting may be overriden by the user space with
> the help of the /sys/devices/.../power/control interface.
>
> That's necessary to avoid breakage on systems where ACPI-based
> wake-up is known to fail for some devices.
>
> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
> ---
> drivers/pci/pci.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> Index: linux-2.6/drivers/pci/pci.c
> ===================================================================
> --- linux-2.6.orig/drivers/pci/pci.c
> +++ linux-2.6/drivers/pci/pci.c
> @@ -1540,8 +1540,10 @@ void pci_pm_init(struct pci_dev *dev)
> int pm;
> u16 pmc;
>
> + pm_runtime_forbid(&dev->dev);
> device_enable_async_suspend(&dev->dev);
> dev->wakeup_prepared = false;
> +
> dev->pm_cap = 0;
>
> /* find PCI PM capability in list */
>

Applied to my for-linus branch, thanks.

--
Jesse Barnes, Intel Open Source Technology Center


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