From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: [PATCH] PCI / ACPI / PM: Avoid resuming devices that don't signal PME Date: Sun, 6 Nov 2011 22:21:46 +0100 Message-ID: <201111062221.46819.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: Received: from ogre.sisk.pl ([217.79.144.158]:53508 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750795Ab1KFVTJ (ORCPT ); Sun, 6 Nov 2011 16:19:09 -0500 Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Jesse Barnes Cc: LKML , ACPI Devel Mailing List , Linux PM list , Matthew Garrett From: Rafael J. Wysocki 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 --- drivers/pci/pci-acpi.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) Index: linux/drivers/pci/pci-acpi.c =================================================================== --- linux.orig/drivers/pci/pci-acpi.c +++ linux/drivers/pci/pci-acpi.c @@ -45,16 +45,20 @@ static void pci_acpi_wake_dev(acpi_handl { 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); } /**