[dpdk-dev] [PATCH v4 09/16] net/mlx5: check max Verbs port number

[Xueming Li <xuemingl@nvidia.com>]

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 <xuemingl@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@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 f041f9054f..db44169b84 100644
--- a/drivers/net/mlx5/linux/mlx5_os.c
+++ b/drivers/net/mlx5/linux/mlx5_os.c
@@ -1294,6 +1294,12 @@ 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