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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Aug 2021 04:44:08.6596 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 054297bf-08e3-4fa4-caaa-08d95bb97de5 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.112.32];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT003.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB4440 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When two devices with same SID are getting probed concurrently through iommu_probe_device(), the iommu_group and iommu_domain are allocated more than once because they are not protected for concurrency. This is leading to context faults when one device is accessing IOVA from other device. Fix this by protecting iommu_domain and iommu_group creation with mutexes. Changes in v3: * Updated commit messages. * Added Signed-off-by in patch 2. Ashish Mhetre (1): iommu: Fix race condition during default domain allocation Krishna Reddy (1): iommu/arm-smmu: Fix race condition during iommu_group creation drivers/iommu/arm/arm-smmu/arm-smmu.c | 6 +++++- drivers/iommu/iommu.c | 2 ++ 2 files changed, 7 insertions(+), 1 deletion(-) -- 2.7.4