From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp1040.oracle.com ([141.146.126.69]:38498 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756837Ab3AUVVf (ORCPT ); Mon, 21 Jan 2013 16:21:35 -0500 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 v10 08/11] PCI, ACPI: debug print for installation of acpi root bridge's notifier Date: Mon, 21 Jan 2013 13:20:49 -0800 Message-Id: <1358803252-20639-9-git-send-email-yinghai@kernel.org> In-Reply-To: <1358803252-20639-1-git-send-email-yinghai@kernel.org> References: <1358803252-20639-1-git-send-email-yinghai@kernel.org> Sender: linux-pci-owner@vger.kernel.org List-ID: 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 a2d2c4c..417487a 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -751,6 +751,7 @@ 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 }; @@ -763,9 +764,14 @@ 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; } -- 1.7.10.4