PM: Allow PCI devices to suspend/resume asynchronously (a1e4d72c) · Commits · 戴 / test

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>

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));

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