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PCI/ACPI/PM: Avoid resuming devices that don't signal PME 

Modify pci_acpi_wake_dev() to avoid resuming PME-capable devices
whose PME Status bits are not set, which may happen currently if
several devices are associated with the same wakeup GPE and all
of them are notified whenever at least one of them signals PME.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki 2011-11-06 22:21:46 +01:00 committed by Jesse Barnes
parent d90116ea38
commit a424948dde
1 changed files with 8 additions and 4 deletions
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12
drivers/pci/pci-acpi.c
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@ -45,16 +45,20 @@ static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context)
{
struct pci_dev *pci_dev = context;
if (event == ACPI_NOTIFY_DEVICE_WAKE && pci_dev) {
if (event != ACPI_NOTIFY_DEVICE_WAKE || !pci_dev)
return;
if (!pci_dev->pm_cap || !pci_dev->pme_support
|| pci_check_pme_status(pci_dev)) {
if (pci_dev->pme_poll)
pci_dev->pme_poll = false;
pci_wakeup_event(pci_dev);
pci_check_pme_status(pci_dev);
pm_runtime_resume(&pci_dev->dev);
if (pci_dev->subordinate)
pci_pme_wakeup_bus(pci_dev->subordinate);
}
if (pci_dev->subordinate)
pci_pme_wakeup_bus(pci_dev->subordinate);
}
/**