From a424948dde8421089826e2f782d0efe9e565707e Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Sun, 6 Nov 2011 22:21:46 +0100 Subject: [PATCH] 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 Signed-off-by: Jesse Barnes --- drivers/pci/pci-acpi.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index c8e75851a314..060fd22a1103 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -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); } /** -- 2.20.1