aboutsummaryrefslogtreecommitdiff
path: root/drivers/pci/pci-driver.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pci/pci-driver.c')
-rw-r--r--drivers/pci/pci-driver.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index a5f11ad975b..8395206d1ae 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -423,6 +423,23 @@ static int pci_legacy_resume(struct device *dev)
/* Auxiliary functions used by the new power management framework */
+/**
+ * pci_restore_standard_config - restore standard config registers of PCI device
+ * @pci_dev: PCI device to handle
+ */
+static int pci_restore_standard_config(struct pci_dev *pci_dev)
+{
+ pci_update_current_state(pci_dev, PCI_UNKNOWN);
+
+ if (pci_dev->current_state != PCI_D0) {
+ int error = pci_set_power_state(pci_dev, PCI_D0);
+ if (error)
+ return error;
+ }
+
+ return pci_dev->state_saved ? pci_restore_state(pci_dev) : 0;
+}
+
static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev)
{
pci_restore_standard_config(pci_dev);