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PCI / PM: Do not resume any devices in pci_pm_prepare()

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It should not be necessary to resume devices with ignore_children set
in pci_pm_prepare(), because they should be resumed explicitly by
their children drivers during suspend if need be and they will be
resumed by pci_pm_suspend() after that anyway, so avoid doing that.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2017-09-25 01:33:13 +02:00
parent e19b205be4
commit 1cb31d3fd4
1 changed files with 0 additions and 7 deletions
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7
drivers/pci/pci-driver.c
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@ -680,13 +680,6 @@ static int pci_pm_prepare(struct device *dev)
{
struct device_driver *drv = dev->driver;
/*
* Devices having power.ignore_children set may still be necessary for
* suspending their children in the next phase of device suspend.
*/
if (dev->power.ignore_children)
pm_runtime_resume(dev);
if (drv && drv->pm && drv->pm->prepare) {
int error = drv->pm->prepare(dev);
if (error)