From: Guy Levi <guyle@mellanox.com>
Date: Thu, 17 Aug 2017 15:50:49 +0300
Subject: IB/mlx4: Check that reserved fields in mlx4_ib_create_qp_rss are zero
Patch-mainline: v4.14-rc1
Git-commit: f9bfea992e7d7557c40a58e8536ad8c6f177de25
References: bsc#1046302 FATE#322945

According to mlx4 convention, need to fail the command due to a non-zero
value in the user data which is expected to be zero.

Fixes: 3078f5f1bd8b ("IB/mlx4: Add support for RSS QP")
Signed-off-by: Guy Levi <guyle@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/mlx4/qp.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -812,6 +812,9 @@ static struct ib_qp *_mlx4_ib_create_qp_
 		return ERR_PTR(-EFAULT);
 	}
 
+	if (memchr_inv(ucmd.reserved, 0, sizeof(ucmd.reserved)))
+		return ERR_PTR(-EOPNOTSUPP);
+
 	if (ucmd.comp_mask || ucmd.reserved1)
 		return ERR_PTR(-EOPNOTSUPP);