Commit bb910a70 authored Feb 27, 2010 by Rafael J. Wysocki Committed by Jesse Barnes Mar 05, 2010

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



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>

parent 64096c17

drivers/pci/pci.c

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1540,8 +1540,10 @@ void pci_pm_init(struct pci_dev *dev)
	int pm;		int pm;
	u16 pmc;		u16 pmc;

			pm_runtime_forbid(&dev->dev);
	device_enable_async_suspend(&dev->dev);		device_enable_async_suspend(&dev->dev);
	dev->wakeup_prepared = false;		dev->wakeup_prepared = false;

	dev->pm_cap = 0;		dev->pm_cap = 0;

	/* find PCI PM capability in list */		/* find PCI PM capability in list */