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PCI/PM Runtime: Make runtime PM of PCI devices inactive by default

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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>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki 2010-02-27 21:37:37 +01:00 committed by Jesse Barnes
parent 64096c1741
commit bb910a7040
1 changed files with 2 additions and 0 deletions
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2
drivers/pci/pci.c
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@ -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 */