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path: root/drivers/pci/pci-driver.c
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Diffstat (limited to 'drivers/pci/pci-driver.c')
-rw-r--r--drivers/pci/pci-driver.c21
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 9de07b75b99..ab1d615425a 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);
@@ -660,7 +669,10 @@ static int pci_pm_poweroff(struct device *dev)
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend(dev, PMSG_HIBERNATE);
- if (drv && drv->pm && drv->pm->poweroff) {
+ if (!drv || !drv->pm)
+ return 0;
+
+ if (drv->pm->poweroff) {
error = drv->pm->poweroff(dev);
suspend_report_result(drv->pm->poweroff, error);
}
@@ -710,6 +722,13 @@ 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);