net/mlx5: fix probing device in legacy bonding mode

[ upstream commit ecaee30 ]

If the device was configured as legacy bond one (without
involving E-Switch), the mlx5 PMD erroneously tried to deduce
the vport index raising the fatal error and preventing
device from being used.

The patch checks whether there is E-Switch present and we
should use vport index indeed.

Fixes: 2eb4d01 ("net/mlx5: refactor PCI probing on Linux")
Fixes: d5c06b1 ("net/mlx5: query vport index match mode and parameters")

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>

drivers/net/mlx5/linux/mlx5_os.c

@@ -982,7 +982,8 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
 	}
 	if (devx_port.comp_mask & MLX5DV_DEVX_PORT_VPORT) {
 		priv->vport_id = devx_port.vport_num;
-	} else if (spawn->pf_bond >= 0) {
+	} else if (spawn->pf_bond >= 0 &&
+		   (switch_info->representor || switch_info->master)) {
 		DRV_LOG(ERR, "can't deduce vport index for port %d"
 			     " on bonding device %s",
 			     spawn->phys_port,