diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index ec317bcb1bcabb2f8ea1bc9ebcb775eaa1ed0ed7..bc1ff41ce3d35f94fbc5d9d201af1f0d2a0436a9 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -1042,17 +1042,22 @@ static int pci_pm_thaw_noirq(struct device *dev) return error; } - if (pci_has_legacy_pm_support(pci_dev)) - return pci_legacy_resume_early(dev); - /* - * pci_restore_state() requires the device to be in D0 (because of MSI - * restoration among other things), so force it into D0 in case the - * driver's "freeze" callbacks put it into a low-power state directly. + * Both the legacy ->resume_early() and the new pm->thaw_noirq() + * callbacks assume the device has been returned to D0 and its + * config state has been restored. + * + * In addition, pci_restore_state() restores MSI-X state in MMIO + * space, which requires the device to be in D0, so return it to D0 + * in case the driver's "freeze" callbacks put it into a low-power + * state. */ pci_set_power_state(pci_dev, PCI_D0); pci_restore_state(pci_dev); + if (pci_has_legacy_pm_support(pci_dev)) + return pci_legacy_resume_early(dev); + if (drv && drv->pm && drv->pm->thaw_noirq) error = drv->pm->thaw_noirq(dev);