[PATCH net 5/5] net/mlx5: E-switch, Fix error handling for enabling roce

Mark Bloch
2025-04-23T08:36:58Z

From: Chris Mi <cmi@nvidia.com>

The cited commit assumes enabling roce always succeeds. But it is
not true. Add error handling for it.

Fixes: 80f09dfc237f ("net/mlx5: Eswitch, enable RoCE loopback traffic")
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
---
.../net/ethernet/mellanox/mlx5/core/eswitch_offloads.c | 5 ++++-
drivers/net/ethernet/mellanox/mlx5/core/rdma.c | 9 +++++----
drivers/net/ethernet/mellanox/mlx5/core/rdma.h | 4 ++--
3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index a6a8eea5980c..0e3a977d5332 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -3533,7 +3533,9 @@ int esw_offloads_enable(struct mlx5_eswitch *esw)
int err;

mutex_init(&esw->offloads.termtbl_mutex);
- mlx5_rdma_enable_roce(esw->dev);
+ err = mlx5_rdma_enable_roce(esw->dev);
+ if (err)
+ goto err_roce;

err = mlx5_esw_host_number_init(esw);
if (err)
@@ -3594,6 +3596,7 @@ int esw_offloads_enable(struct mlx5_eswitch *esw)
esw_offloads_metadata_uninit(esw);
err_metadata:
mlx5_rdma_disable_roce(esw->dev);
+err_roce:
mutex_destroy(&esw->offloads.termtbl_mutex);
return err;
}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/rdma.c b/drivers/net/ethernet/mellanox/mlx5/core/rdma.c
index f585ef5a3424..5c552b71e371 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/rdma.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/rdma.c
@@ -140,17 +140,17 @@ void mlx5_rdma_disable_roce(struct mlx5_core_dev *dev)
mlx5_nic_vport_disable_roce(dev);
}

-void mlx5_rdma_enable_roce(struct mlx5_core_dev *dev)
+int mlx5_rdma_enable_roce(struct mlx5_core_dev *dev)
{
int err;

if (!MLX5_CAP_GEN(dev, roce))
- return;
+ return 0;

err = mlx5_nic_vport_enable_roce(dev);
if (err) {
mlx5_core_err(dev, "Failed to enable RoCE: %d\n", err);
- return;
+ return err;
}

err = mlx5_rdma_add_roce_addr(dev);
@@ -165,10 +165,11 @@ void mlx5_rdma_enable_roce(struct mlx5_core_dev *dev)
goto del_roce_addr;
}

- return;
+ return err;

del_roce_addr:
mlx5_rdma_del_roce_addr(dev);
disable_roce:
mlx5_nic_vport_disable_roce(dev);
+ return err;
}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/rdma.h b/drivers/net/ethernet/mellanox/mlx5/core/rdma.h
index 750cff2a71a4..3d9e76c3d42f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/rdma.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/rdma.h
@@ -8,12 +8,12 @@

#ifdef CONFIG_MLX5_ESWITCH

-void mlx5_rdma_enable_roce(struct mlx5_core_dev *dev);
+int mlx5_rdma_enable_roce(struct mlx5_core_dev *dev);
void mlx5_rdma_disable_roce(struct mlx5_core_dev *dev);

#else /* CONFIG_MLX5_ESWITCH */

-static inline void mlx5_rdma_enable_roce(struct mlx5_core_dev *dev) {}
+static inline int mlx5_rdma_enable_roce(struct mlx5_core_dev *dev) { return 0; }
static inline void mlx5_rdma_disable_roce(struct mlx5_core_dev *dev) {}

#endif /* CONFIG_MLX5_ESWITCH */
--
2.34.1