From: Leon Romanovsky <leonro@nvidia.com>
Date: Tue, 12 Oct 2021 07:28:43 +0000 (+0300)
Subject: RDMA/mlx4: Return missed an error if device doesn't support steering
X-Git-Tag: v4.4.293~63
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9e35852fec5601d9795fe76a12f238ea914bc37;p=thirdparty%2Fkernel%2Fstable.git

RDMA/mlx4: Return missed an error if device doesn't support steering

[ Upstream commit f4e56ec4452f48b8292dcf0e1c4bdac83506fb8b ]

The error flow fixed in this patch is not possible because all kernel
users of create QP interface check that device supports steering before
set IB_QP_CREATE_NETIF_QP flag.

Fixes: c1c98501121e ("IB/mlx4: Add support for steerable IB UD QPs")
Link: https://lore.kernel.org/r/91c61f6e60eb0240f8bbc321fda7a1d2986dd03c.1634023677.git.leonro@nvidia.com
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index ecd461ee6dbe2..a15beb161b64c 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -766,8 +766,10 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
 			if (dev->steering_support ==
 			    MLX4_STEERING_MODE_DEVICE_MANAGED)
 				qp->flags |= MLX4_IB_QP_NETIF;
-			else
+			else {
+				err = -EINVAL;
 				goto err;
+			}
 		}
 
 		err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp);