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Wed, 27 May 2026 05:55:53 -0700 From: Tariq Toukan To: Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , "David S. Miller" CC: Saeed Mahameed , Leon Romanovsky , Tariq Toukan , Mark Bloch , Nimrod Oren , Yael Chemla , Shay Drory , Or Har-Toov , Edward Srouji , Maher Sanalla , Simon Horman , Parav Pandit , Patrisious Haddad , Kees Cook , Moshe Shemesh , , , , Gal Pressman Subject: [PATCH net-next 09/13] net/mlx5: LAG, block multipath LAG for SD devices Date: Wed, 27 May 2026 15:54:23 +0300 Message-ID: <20260527125427.385976-10-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20260527125427.385976-1-tariqt@nvidia.com> References: <20260527125427.385976-1-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF00012E63:EE_|IA1PR12MB8080:EE_ X-MS-Office365-Filtering-Correlation-Id: 7ca3c54c-997c-4efb-76ee-08debbef5704 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|1800799024|376014|7416014|82310400026|56012099006|11063799006|18002099003|22082099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230040)(36860700016)(1800799024)(376014)(7416014)(82310400026)(56012099006)(11063799006)(18002099003)(22082099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: SzOuJpNMFE+4fALt2PqwNObxb66uUSjU1wBaUN5ejOqpq2dE0bsOrbozLfHyi8BLMe/sfVjINujCOtHoP6/wwNwbA8b2JDJXLzY5af4kqRh3n3GZTwL9H+0xkFawsWuTNhJbBqZNIg6NKe5KMuOycKMYfrnFL16EtlQq6RHIKEjOG5pgSIwLNdzHI4uZw9LMDfvOT0AW8iJA5o0hcvl6FHsI/CUSGUwAZbpYV3aE4U0RyYYUaJVMX/C72Azv83AbXhasiVRJu106KMn5vej4wcmfz791VZUPJxhR1hYM1U93mkDLl8uNoVhRVSCja2PXknYypV6w8A9SaWkDH4UdhfChR9GfWywkS5DD4dpPtyF1zOpSRKRJlOoEtICePOvgkYJY+cK8k9nCts9ULOkRIEqRXYzKVebqazM6r8rz7HwQrWbGfhnQEC8qgQEl7VYC X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 May 2026 12:56:16.3680 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7ca3c54c-997c-4efb-76ee-08debbef5704 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF00012E63.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB8080 From: Shay Drory SD devices are not compatible with multipath LAG since they use dedicated SD LAG for cross-socket connectivity. Add an SD check to the multipath prereq validation to prevent multipath LAG activation on SD-configured ports. Signed-off-by: Shay Drory Reviewed-by: Mark Bloch Signed-off-by: Tariq Toukan --- drivers/net/ethernet/mellanox/mlx5/core/lag/mp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/mp.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/mp.c index f42e051fa7e7..65c76bd748c6 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lag/mp.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/mp.c @@ -26,6 +26,10 @@ static bool mlx5_lag_multipath_check_prereq(struct mlx5_lag *ldev) if (__mlx5_lag_is_active(ldev) && !__mlx5_lag_is_multipath(ldev)) return false; + if (__mlx5_lag_is_sd(ldev, mlx5_lag_pf(ldev, idx0)->dev) || + __mlx5_lag_is_sd(ldev, mlx5_lag_pf(ldev, idx1)->dev)) + return false; + if (ldev->ports > MLX5_LAG_MULTIPATH_OFFLOADS_SUPPORTED_PORTS) return false; -- 2.44.0