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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Oct 2023 10:45:17.4403 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b73e77cf-4c82-4651-da9c-08dbce34fca4 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: MN1PEPF0000F0DF.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB4922 Return error if PASID is already exists. Signed-off-by: Vasant Hegde --- drivers/iommu/amd/iommu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index d6e9f1ebd1ea..8e5d1dcc50dc 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -1945,6 +1945,9 @@ static int __clear_gcr3(struct iommu_dev_data *dev_data, ioasid_t pasid) if (pte == NULL) return -EINVAL; + if (*pte & GCR3_VALID) + return -EBUSY; + *pte = 0; amd_iommu_dev_flush_pasid_all(dev_data, pasid); -- 2.31.1