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Tue, 4 Nov 2025 20:47:33 -0800 Date: Tue, 4 Nov 2025 20:47:31 -0800 From: Nicolin Chen To: Jason Gunthorpe CC: , Joerg Roedel , , Robin Murphy , "Shuah Khan" , Will Deacon , Alex Mastro , Eric Auger , Kevin Tian , Lixiao Yang , Matthew Rosato , , Yi Liu Subject: Re: [PATCH iommufd] iommufd: Make vfio_compat's unmap succeed if the range is already empty Message-ID: References: <0-v1-76be45eff0be+5d-iommufd_unmap_compat_jgg@nvidia.com> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <0-v1-76be45eff0be+5d-iommufd_unmap_compat_jgg@nvidia.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF000044A3:EE_|SJ2PR12MB8942:EE_ X-MS-Office365-Filtering-Correlation-Id: 2bee36d1-7211-46ff-3975-08de1c267665 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|1800799024|7416014|376014; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Nov 2025 04:47:45.2059 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2bee36d1-7211-46ff-3975-08de1c267665 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF000044A3.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8942 On Tue, Nov 04, 2025 at 02:11:49PM -0400, Jason Gunthorpe wrote: > iommufd returns ENOENT when attempting to unmap a range that is already > empty, while vfio type1 returns success. Fix vfio_compat to match. > > Fixes: d624d6652a65 ("iommufd: vfio container FD ioctl compatibility") > Reported-by: Alex Mastro > Closes: https://lore.kernel.org/r/aP0S5ZF9l3sWkJ1G@devgpu012.nha5.facebook.com > Signed-off-by: Jason Gunthorpe Reviewed-by: Nicolin Chen