From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: [PATCH 2/2] iommu/vt-d: Check return value of acpi_bus_get_device() Date: Thu, 21 Aug 2014 23:37:25 +0200 Message-ID: <1408657045-4979-3-git-send-email-joro@8bytes.org> References: <1408657045-4979-1-git-send-email-joro@8bytes.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1408657045-4979-1-git-send-email-joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Cc: Joerg Roedel , David Woodhouse , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: iommu@lists.linux-foundation.org From: Joerg Roedel Checking adev == NULL is not sufficient as acpi_bus_get_device() might not touch the value of this parameter in an error case, so check the return value directly. Fixes: ed40356b5fcf1ce28e026ab39c5b2b6939068b50 Cc: David Woodhouse Signed-off-by: Joerg Roedel --- drivers/iommu/dmar.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 60ab474..06d268a 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -678,8 +678,7 @@ static int __init dmar_acpi_dev_scope_init(void) andd->device_name); continue; } - acpi_bus_get_device(h, &adev); - if (!adev) { + if (acpi_bus_get_device(h, &adev)) { pr_err("Failed to get device for ACPI object %s\n", andd->device_name); continue; -- 1.9.1