pci: framework: skip PCI restore in pci_pm_resume if no_d3hot is set

PCI devices with no_d3hot set do not need its configuration space restored in pci_pm_resume. Change-Id: Ia92f5278bfbd35d082fce53d9b2de9397a69b942 Signed-off-by: Tony Truong <[email protected]>
sonyxperiadev · Aug 16, 2019 · 4dc5db4 · 4dc5db4
1 parent e0463d3
commit 4dc5db4
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
@@ -853,13 +853,17 @@ static int pci_pm_resume(struct device *dev)
 	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 	int error = 0;
 
+	if (pci_dev->no_d3hot)
+		goto skip_pci_pm_restore;
+
 	/*
 	 * This is necessary for the suspend error path in which resume is
 	 * called without restoring the standard config registers of the device.
 	 */
 	if (pci_dev->state_saved)
 		pci_restore_standard_config(pci_dev);
 
+skip_pci_pm_restore:
 	if (pci_has_legacy_pm_support(pci_dev))
 		return pci_legacy_resume(dev);