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Mon, 1 Dec 2025 07:13:57 -0800 From: Tariq Toukan To: Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , "David S. Miller" CC: Saeed Mahameed , Tariq Toukan , "Mark Bloch" , Leon Romanovsky , , , , Gal Pressman , Moshe Shemesh Subject: [PATCH net 1/2] net/mlx5: make enable_mpesw idempotent Date: Mon, 1 Dec 2025 17:13:27 +0200 Message-ID: <1764602008-1334866-2-git-send-email-tariqt@nvidia.com> X-Mailer: git-send-email 2.8.0 In-Reply-To: <1764602008-1334866-1-git-send-email-tariqt@nvidia.com> References: <1764602008-1334866-1-git-send-email-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF0000009B:EE_|DM4PR12MB6302:EE_ X-MS-Office365-Filtering-Correlation-Id: 166e4633-1709-4ab1-8ddb-08de30ec515b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|376014|82310400026|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?hR5WzAMUHOFjvnEl5AG+ZLCjZaUx0e1LhQeV8/IwNttEK17CLay9DXlGvhk5?= =?us-ascii?Q?vZ1QNkqolpdZ0CZqrCq0XU4JWlXXhMeEeaxr3J6GXMYnRZi+kpPOd25opHkc?= =?us-ascii?Q?VyH2TQEjlBpdqfOhSpWhnMZrkM5VQXBWTHxserETaF3ldEixLcBBjxKMTy7I?= =?us-ascii?Q?FT7M/aaNzCemsZXAktj4GuvEWEhMJMdOHmwX/o1XI1pwLz0gHJV430PeovCO?= =?us-ascii?Q?0TFe616fGbferRhLtvOv0bTUq2fRdIWyPeBYExqVrZtQkgs+VrRQOHM0Z4Ak?= =?us-ascii?Q?34s2a0FIameMZBzMb8hEtxj3ISFhTocyMWX8s5dlAPo5YyhGWkOlwv3WUpFP?= =?us-ascii?Q?JKKNmOzkGHGkLANpHN82IbensA2A309i08EksB9Ky3H+KKHeA4qcpClXGMh3?= =?us-ascii?Q?hsRx/vNH6yt/ZgoD/rnJjtZ6PIM310glqf+Hnna6/A8pXZUR/AqQ8Ou2d67C?= =?us-ascii?Q?5s35FRNuQgu9neIBcZlXqXaSKTPTXQBpg54nAHToGr7CHsrFpa7oP6ZqxyaY?= =?us-ascii?Q?TWg/KFhyLKuuMxrdwTdF80Nibrm6yXO7OaYMPkLZ8lgJoCc+NuUdPKlxDVkO?= =?us-ascii?Q?MxduNNvJKoAb/4bz3ZWiB6dExCA0TmcqtXNV4t3BzYum2cCEKF8hp2wWhAzs?= =?us-ascii?Q?pLyatfKZp689WQr7u1hSAhu+AF0aIyJHaUv6FVbfdqcAldcT2SX++E7sB79B?= =?us-ascii?Q?BjbchCy3rOoISXoZvmtIrTHlNnMiMGkmY1ktdD0bZ01jHfL7FvC+E5731As1?= =?us-ascii?Q?K1p2Q0mhvvkmTyD6TQy9p/afezoMtyyi4DY/UZPlrJ2UJ/2GGjLhJdWIsDVG?= =?us-ascii?Q?fvBkfbVHslWCKU0+fUr9Gys8dC8xj9g7hMraLuvhCb75vTThTw+9Ijymu2AZ?= =?us-ascii?Q?/028c3ScEA4vPcudmuS48a3pyWFsyvWA2VIVC5l1yVaDxxeR7itbavouKavP?= =?us-ascii?Q?9UNaWVZrVp+7T/DMgJH1bEPwBQ1ygXXY2jpKmCjHyeyjzxL93rfcgO6DkycD?= =?us-ascii?Q?WmATtA99e45n9kNvL9mBWkrmSm+xl3CNNTHzTxMAf8J2ikT0x+2qZZ9Q0aqo?= =?us-ascii?Q?DMKMRPp/Zf85bPNH19oJuE0vOotaQClvxj4fOUs03WtORPTd2yyM6rJ5up5c?= =?us-ascii?Q?hIpydQafdFaiFz6lCzC1qhjKiUyt84CeUgDwrqa38HOK1gI1fK3hsUSc5Byi?= =?us-ascii?Q?eDTSG2kEQUh0qGxrwhuGfvd8/SkUP0tce7cj763RsDk4dl4XrfEniHS2V2rt?= =?us-ascii?Q?0qtJZDY4caeoQYxGOrSYoqfduS4A6A7uKPlh9u4DAr967CJ4RR/Oq/8wv3QS?= =?us-ascii?Q?uvJF5DOSDLwdKwzGk3njJM52dHF8QaxTdRugpKymXAgX6NkwrJ39mzWBADa2?= =?us-ascii?Q?9rnlIVgU3C9kl2mZf8WQn+k3PxN4PEgqsTv4RbdF2e9GaQeGjpPii3LogFyu?= =?us-ascii?Q?QH26doGqPh7Y8MLBs98TDFbMTuGp7jGdbrhoPzWeSVhJUlqGYuU4JGLO0E09?= =?us-ascii?Q?KC/MRFAa9lxzmr4nIK+i6wtojVd6PjoIpG2pTMfD3+crMDU7X+rxS0k699g3?= =?us-ascii?Q?/GFrmAqkxPkflla/tVA=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(36860700013)(376014)(82310400026)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Dec 2025 15:14:26.6902 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 166e4633-1709-4ab1-8ddb-08de30ec515b X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF0000009B.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6302 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Moshe Shemesh The enable_mpesw() function returns -EINVAL if ldev->mode is not MLX5_LAG_MODE_NONE. This means attempting to enable MPESW mode when it's already enabled will fail. In contrast, disable_mpesw() properly checks if the mode is MLX5_LAG_MODE_MPESW before proceeding, making it naturally idempotent and safe to call multiple times. Fix enable_mpesw() to return success if mpesw is already enabled. Fixes: a32327a3a02c ("net/mlx5: Lag, Control MultiPort E-Switch single FDB = mode") Signed-off-by: Moshe Shemesh Reviewed-by: Shay Drori Signed-off-by: Tariq Toukan --- drivers/net/ethernet/mellanox/mlx5/core/lag/mpesw.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/mpesw.c b/drivers/= net/ethernet/mellanox/mlx5/core/lag/mpesw.c index aad52d3a90e6..2d86af8f0d9b 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lag/mpesw.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/mpesw.c @@ -67,12 +67,19 @@ static int mlx5_mpesw_metadata_set(struct mlx5_lag *lde= v) =20 static int enable_mpesw(struct mlx5_lag *ldev) { - int idx =3D mlx5_lag_get_dev_index_by_seq(ldev, MLX5_LAG_P1); struct mlx5_core_dev *dev0; int err; + int idx; int i; =20 - if (idx < 0 || ldev->mode !=3D MLX5_LAG_MODE_NONE) + if (ldev->mode =3D=3D MLX5_LAG_MODE_MPESW) + return 0; + + if (ldev->mode !=3D MLX5_LAG_MODE_NONE) + return -EINVAL; + + idx =3D mlx5_lag_get_dev_index_by_seq(ldev, MLX5_LAG_P1); + if (idx < 0) return -EINVAL; =20 dev0 =3D ldev->pf[idx].dev; --=20 2.31.1