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PM: Allow PCI devices to suspend/resume asynchronously 

Set power.async_suspend for all PCI devices and PCIe port services,
so that they can be suspended and resumed in parallel with other
devices they don't depend on in a known way (i.e. devices which are
not their parents or children).

This only affects the "regular" suspend and resume stages, which
means in particular that the restoration of the PCI devices' standard
configuration registers during resume will still be carried out
synchronously (at the "early" resume stage).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Rafael J. Wysocki 2010-02-08 19:16:33 +01:00
parent 09c09bc618
commit a1e4d72cd3
3 changed files with 3 additions and 0 deletions
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1
drivers/pci/pci.c
View File

@ -1540,6 +1540,7 @@ void pci_pm_init(struct pci_dev *dev)
int pm;
u16 pmc;
device_enable_async_suspend(&dev->dev);
dev->wakeup_prepared = false;
dev->pm_cap = 0;

1
drivers/pci/pcie/portdrv_core.c
View File

@ -285,6 +285,7 @@ static int pcie_device_init(struct pci_dev *pdev, int service, int irq)
pci_name(pdev),
get_descriptor_id(pdev->pcie_type, service));
device->parent = &pdev->dev;
device_enable_async_suspend(device);
retval = device_register(device);
if (retval)

1
drivers/pci/probe.c
View File

@ -1436,6 +1436,7 @@ struct pci_bus * pci_create_bus(struct device *parent,
if (error)
goto dev_reg_err;
b->bridge = get_device(dev);
device_enable_async_suspend(b->bridge);
if (!parent)
set_dev_node(b->bridge, pcibus_to_node(b));