[dpdk-dev] [PATCH v1 08/14] net/mlx5: check max Verbs port number

[Xueming Li]

Verbs API doesn't support Device port number larger than 255 by design.
Adds check and fails probing with proper error log.

Signed-off-by: Xueming Li <xuemi...@nvidia.com>
---
 drivers/net/mlx5/linux/mlx5_os.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/mlx5/linux/mlx5_os.c b/drivers/net/mlx5/linux/mlx5_os.c
index 47df3b92f8..9a3616d539 100644
--- a/drivers/net/mlx5/linux/mlx5_os.c
+++ b/drivers/net/mlx5/linux/mlx5_os.c
@@ -1168,6 +1168,12 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
                config->dv_flow_en = 0;
        }
 #endif
+       if (spawn->max_port > UINT8_MAX) {
+               /* Verbs can't support ports larger than 255 by design. */
+               DRV_LOG(ERR, "can't support IB ports > UINT8_MAX");
+               err = EINVAL;
+               goto error;
+       }
        config->ind_table_max_size =
                sh->device_attr.max_rwq_indirection_table_size;
        /*
-- 
2.25.1