From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: [PATCH 2/12] PCI / PM: Propagate wake-up enable for PCIe devices too Date: Sun, 27 Dec 2009 21:00:33 +0100 Message-ID: <200912272100.33117.rjw__31210.6418110945$1261944795$gmane$org@sisk.pl> References: <200912272057.10443.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200912272057.10443.rjw@sisk.pl> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.linux-foundation.org Errors-To: linux-pm-bounces@lists.linux-foundation.org To: Jesse Barnes Cc: Linux PCI , LKML , ACPI Devel Maling List , Francois Romieu , pm list , Matthew Garrett List-Id: linux-pm@vger.kernel.org From: Rafael J. Wysocki Having read the PM part of the PCIe 2.0 specification more carefully I think that it was a mistake to restrict the wake-up enable propagation to non-PCIe devices, because if we do not request control of the root ports' PME registers via OSC, PCIe PME is supposed to be handled by the platform, just like the non-PCIe PME. Even if we do that, the wake-up propagation is done to allow the devices to wake up the system from sleep states which involves the platform anyway, so it won't hurt. Signed-off-by: Rafael J. Wysocki --- drivers/pci/pci-acpi.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) Index: linux-2.6/drivers/pci/pci-acpi.c =================================================================== --- linux-2.6.orig/drivers/pci/pci-acpi.c +++ linux-2.6/drivers/pci/pci-acpi.c @@ -112,11 +112,7 @@ static bool acpi_pci_can_wakeup(struct p static void acpi_pci_propagate_wakeup_enable(struct pci_bus *bus, bool enable) { while (bus->parent) { - struct pci_dev *bridge = bus->self; - int ret; - - ret = acpi_pm_device_sleep_wake(&bridge->dev, enable); - if (!ret || pci_is_pcie(bridge)) + if (!acpi_pm_device_sleep_wake(&bus->self->dev, enable)) return; bus = bus->parent; } @@ -131,9 +127,7 @@ static int acpi_pci_sleep_wake(struct pc if (acpi_pci_can_wakeup(dev)) return acpi_pm_device_sleep_wake(&dev->dev, enable); - if (!pci_is_pcie(dev)) - acpi_pci_propagate_wakeup_enable(dev->bus, enable); - + acpi_pci_propagate_wakeup_enable(dev->bus, enable); return 0; }