diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci-driver.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 9de07b75b993..4884c4840b3d 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -370,6 +370,7 @@ static int pci_legacy_suspend(struct device *dev, pm_message_t state) } pci_save_state(pci_dev); + pci_dev->state_saved = true; /* * This is for compatibility with existing code with legacy PM support. */ @@ -419,6 +420,7 @@ static int pci_legacy_resume(struct device *dev) static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev) { pci_restore_standard_config(pci_dev); + pci_dev->state_saved = false; pci_fixup_device(pci_fixup_resume_early, pci_dev); } @@ -555,6 +557,13 @@ static int pci_pm_resume(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + /* + * 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); + if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume(dev); @@ -710,6 +719,13 @@ static int pci_pm_restore(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + /* + * This is necessary for the hibernation error path in which restore is + * called without restoring the standard config registers of the device. + */ + if (pci_dev->state_saved) + pci_restore_standard_config(pci_dev); + if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume(dev); |