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PCI PM: Register power state of devices during initialization

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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>
This commit is contained in:
Rafael J. Wysocki 2009-01-07 13:10:35 +01:00 committed by Jesse Barnes
parent ad8cfa1def
commit 98e6e286d7
1 changed files with 6 additions and 2 deletions
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8
drivers/pci/pci.c
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@ -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);
}
/**