diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 477c90bc5b0ea1161e286044feaec176dd76db8f..40fb86db33769aa43128fea17333dd21a805b43f 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1400,6 +1400,16 @@ static int mlx5_ib_rep_query_port(struct ib_device *ibdev, u8 port,
 	return ret;
 }
 
+static int mlx5_ib_rep_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
+				  u16 *pkey)
+{
+	/* Default special Pkey for representor device port as per the
+	 * IB specification 1.3 section 10.9.1.2.
+	 */
+	*pkey = 0xffff;
+	return 0;
+}
+
 static int mlx5_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
 			     union ib_gid *gid)
 {
@@ -4209,6 +4219,7 @@ static int mlx5_ib_stage_non_default_cb(struct mlx5_ib_dev *dev)
 static const struct ib_device_ops mlx5_ib_dev_port_rep_ops = {
 	.get_port_immutable = mlx5_port_rep_immutable,
 	.query_port = mlx5_ib_rep_query_port,
+	.query_pkey = mlx5_ib_rep_query_pkey,
 };
 
 static int mlx5_ib_stage_raw_eth_non_default_cb(struct mlx5_ib_dev *dev)