Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756261Ab3INB1R (ORCPT ); Fri, 13 Sep 2013 21:27:17 -0400 Received: from hydra.sisk.pl ([212.160.235.94]:55865 "EHLO hydra.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755913Ab3INB1P (ORCPT ); Fri, 13 Sep 2013 21:27:15 -0400 From: "Rafael J. Wysocki" To: Linux PCI Cc: ACPI Devel Maling List , LKML , Linux PM list , Huang Ying , Bjorn Helgaas , Matthew Garrett , "David E. Box" Subject: [PATCH] PCI / ACPI / PM: Clear pme_poll for devices in D3cold on wakeup Date: Sat, 14 Sep 2013 03:38:20 +0200 Message-ID: <4974289.QhzOmFXm0s@vostro.rjw.lan> User-Agent: KMail/4.10.5 (Linux/3.11.0+; KDE/4.10.5; x86_64; ; ) MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1945 Lines: 52 From: Rafael J. Wysocki Commit 448bd85 (PCI/PM: add PCIe runtime D3cold support) added a piece of code to pci_acpi_wake_dev() causing that function to behave in a special way for devices in D3cold (so that their configuration registeres are not accessed before those devices are resumed). However, it didn't take the clearing of the pme_poll flag into account. That has to be done for all devices, even if they are in D3cold, or pci_pme_list_scan() will not know that wakeup has been signaled for the device and will poll its PME Status bit unnecessarily. Fix the problem by moving the clearing of the pme_poll flag in pci_acpi_wake_dev() before the code introduced by commit 448bd85. Reported-and-tested-by: David E. Box Signed-off-by: Rafael J. Wysocki Cc: 3.6+ # 3.6+ --- drivers/pci/pci-acpi.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) Index: linux-pm/drivers/pci/pci-acpi.c =================================================================== --- linux-pm.orig/drivers/pci/pci-acpi.c +++ linux-pm/drivers/pci/pci-acpi.c @@ -47,6 +47,9 @@ static void pci_acpi_wake_dev(acpi_handl if (event != ACPI_NOTIFY_DEVICE_WAKE || !pci_dev) return; + if (pci_dev->pme_poll) + pci_dev->pme_poll = false; + if (pci_dev->current_state == PCI_D3cold) { pci_wakeup_event(pci_dev); pm_runtime_resume(&pci_dev->dev); @@ -57,9 +60,6 @@ static void pci_acpi_wake_dev(acpi_handl if (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); pm_runtime_resume(&pci_dev->dev); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/