From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758858Ab3LFOSg (ORCPT ); Fri, 6 Dec 2013 09:18:36 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:43655 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161140Ab3LFNAK (ORCPT ); Fri, 6 Dec 2013 08:00:10 -0500 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Toshi Kani , "Rafael J. Wysocki" , Luis Henriques Subject: [PATCH 3.11 029/272] ACPI / hotplug: Fix conflicted PCI bridge notify handlers Date: Fri, 6 Dec 2013 12:55:18 +0000 Message-Id: <1386334761-25517-30-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1386334761-25517-1-git-send-email-luis.henriques@canonical.com> References: <1386334761-25517-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.11 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.11.10.1 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Toshi Kani commit ca499fc87ed945094d952da0eb7eea7dbeb1feec upstream. The PCI host bridge scan handler installs its own notify handler, handle_hotplug_event_root(), by itself. Nevertheless, the ACPI hotplug framework also installs the common notify handler, acpi_hotplug_notify_cb(), for PCI root bridges. This causes acpi_hotplug_notify_cb() to call _OST method with unsupported error as hotplug.enabled is not set. To address this issue, introduce hotplug.ignore flag, which indicates that the scan handler installs its own notify handler by itself. The ACPI hotplug framework does not install the common notify handler when this flag is set. Signed-off-by: Toshi Kani [rjw: Changed the name of the new flag] Signed-off-by: Rafael J. Wysocki Signed-off-by: Luis Henriques --- drivers/acpi/pci_root.c | 3 +++ drivers/acpi/scan.c | 2 +- include/acpi/acpi_bus.h | 1 + 3 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 7dbe92c..fa2881b 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -63,6 +63,9 @@ static struct acpi_scan_handler pci_root_handler = { .ids = root_device_ids, .attach = acpi_pci_root_add, .detach = acpi_pci_root_remove, + .hotplug = { + .ignore = true, + }, }; static DEFINE_MUTEX(osc_lock); diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 0ebb955..2487853 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1881,7 +1881,7 @@ static void acpi_scan_init_hotplug(acpi_handle handle, int type) */ list_for_each_entry(hwid, &pnp.ids, list) { handler = acpi_scan_match_handler(hwid->id, NULL); - if (handler) { + if (handler && !handler->hotplug.ignore) { acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, acpi_hotplug_notify_cb, handler); break; diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 94383a7..fea538b 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -90,6 +90,7 @@ enum acpi_hotplug_mode { struct acpi_hotplug_profile { struct kobject kobj; bool enabled:1; + bool ignore:1; enum acpi_hotplug_mode mode; }; -- 1.8.3.2