PCI PM: Register power state of devices during initialization

Use the observation that the power state of a PCI device can be
loaded into its pci_dev structure as soon as pci_pm_init() is run for
it and make that happen.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index e491fde..c12f6c7 100644 (file)
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1260,14 +1260,15 @@ void pci_pm_init(struct pci_dev *dev)
        /* find PCI PM capability in list */
        pm = pci_find_capability(dev, PCI_CAP_ID_PM);
        if (!pm)
-               return;
+               goto Exit;
+
        /* Check device's ability to generate PME# */
        pci_read_config_word(dev, pm + PCI_PM_PMC, &pmc);
 
        if ((pmc & PCI_PM_CAP_VER_MASK) > 3) {
                dev_err(&dev->dev, "unsupported PM cap regs version (%u)\n",
                        pmc & PCI_PM_CAP_VER_MASK);
-               return;
+               goto Exit;
        }
 
        dev->pm_cap = pm;
@@ -1306,6 +1307,9 @@ void pci_pm_init(struct pci_dev *dev)
        } else {
                dev->pme_support = 0;
        }
+
+ Exit:
+       pci_update_current_state(dev, PCI_D0);
 }
 
 /**