From patchwork Fri Jan 18 07:53:19 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 213504 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 1607D2C007A for ; Fri, 18 Jan 2013 18:54:26 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751554Ab3ARHx5 (ORCPT ); Fri, 18 Jan 2013 02:53:57 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:47724 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751358Ab3ARHxw (ORCPT ); Fri, 18 Jan 2013 02:53:52 -0500 Received: from acsinet22.oracle.com (acsinet22.oracle.com [141.146.126.238]) by aserp1040.oracle.com (Sentrion-MTA-4.2.2/Sentrion-MTA-4.2.2) with ESMTP id r0I7rYGs011308 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 18 Jan 2013 07:53:34 GMT Received: from acsmt358.oracle.com (acsmt358.oracle.com [141.146.40.158]) by acsinet22.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id r0I7rXPR004244 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 18 Jan 2013 07:53:34 GMT Received: from abhmt116.oracle.com (abhmt116.oracle.com [141.146.116.68]) by acsmt358.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id r0I7rX58024322; Fri, 18 Jan 2013 01:53:33 -0600 Received: from linux-siqj.site (/75.36.247.180) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 17 Jan 2013 23:53:33 -0800 From: Yinghai Lu To: Bjorn Helgaas , "Rafael J. Wysocki" , Len Brown , Taku Izumi , Jiang Liu Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Tang Chen , Yinghai Lu Subject: [PATCH v9 08/11] PCI, ACPI: debug print for installation of acpi root bridge's notifier Date: Thu, 17 Jan 2013 23:53:19 -0800 Message-Id: <1358495602-22867-9-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1358495602-22867-1-git-send-email-yinghai@kernel.org> References: <1358495602-22867-1-git-send-email-yinghai@kernel.org> X-Source-IP: acsinet22.oracle.com [141.146.126.238] Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Tang Chen acpi_install_notify_handler() could fail. So check the exit status and give a better debug info. Signed-off-by: Tang Chen Signed-off-by: Yinghai Lu --- drivers/acpi/pci_root.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 3ce5d80..f3ceb61 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -762,6 +762,7 @@ static void handle_hotplug_event_root(acpi_handle handle, u32 type, static acpi_status __init find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) { + acpi_status status; char objname[64]; struct acpi_buffer buffer = { .length = sizeof(objname), .pointer = objname }; @@ -774,9 +775,14 @@ find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); - acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, - handle_hotplug_event_root, NULL); - printk(KERN_DEBUG "acpi root: %s notify handler installed\n", objname); + status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, + handle_hotplug_event_root, NULL); + if (ACPI_FAILURE(status)) + printk(KERN_DEBUG "acpi root: %s notify handler is not installed, exit status: %u\n", + objname, (unsigned int)status); + else + printk(KERN_DEBUG "acpi root: %s notify handler is installed\n", + objname); return AE_OK; }