diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index 0caff276f2c1..0c47e3e24b2a 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -4164,7 +4164,7 @@ static int mlx5_ib_modify_dct(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 			return -EINVAL;
 
 		if (attr->port_num == 0 ||
-		    attr->port_num > MLX5_CAP_GEN(dev->mdev, num_ports)) {
+		    attr->port_num > dev->num_ports) {
 			mlx5_ib_dbg(dev, "invalid port number %d. number of ports is %d\n",
 				    attr->port_num, dev->num_ports);
 			return -EINVAL;