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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>
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1 changed files with 8 additions and 4 deletions
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@ -45,16 +45,20 @@ static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context)
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{
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struct pci_dev *pci_dev = context;
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if (event == ACPI_NOTIFY_DEVICE_WAKE && pci_dev) {
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if (event != ACPI_NOTIFY_DEVICE_WAKE || !pci_dev)
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return;
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if (!pci_dev->pm_cap || !pci_dev->pme_support
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|| pci_check_pme_status(pci_dev)) {
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if (pci_dev->pme_poll)
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pci_dev->pme_poll = false;
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pci_wakeup_event(pci_dev);
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pci_check_pme_status(pci_dev);
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pm_runtime_resume(&pci_dev->dev);
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if (pci_dev->subordinate)
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pci_pme_wakeup_bus(pci_dev->subordinate);
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}
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if (pci_dev->subordinate)
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pci_pme_wakeup_bus(pci_dev->subordinate);
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}
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/**
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