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Commit a1e4d72c authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

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: default avatarRafael J. Wysocki <rjw@sisk.pl>
parent 09c09bc6

drivers/pci/pci.c

+1 −0
Original line number Diff line number Diff line
@@ -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;

drivers/pci/pcie/portdrv_core.c

+1 −0
Original line number Diff line number Diff line
@@ -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)

drivers/pci/probe.c

+1 −0
Original line number Diff line number Diff line
@@ -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));