[PATCH 2/2] vdpa/mlx5: fix RQT attributes memory leak

[Maayan Kashani <mkashani@nvidia.com>]

mlx5_vdpa_rqt_prepare() allocates RQT attributes with rte_zmalloc() but
returns without freeing them when no enabled receive queue is found
(k == 0). Every steering update that hits this path leaks the
allocation.

Free attr before returning on the no-enabled-RQ path.

Fixes: 9f09b1ca15c5 ("vdpa/mlx5: recreate a virtq becoming enabled")
Cc: stable@dpdk.org

Signed-off-by: Maayan Kashani <mkashani@nvidia.com>
Acked-by: Dariusz Sosnowski <dsosnowski@nvidia.com>
---
 drivers/vdpa/mlx5/mlx5_vdpa_steer.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/vdpa/mlx5/mlx5_vdpa_steer.c b/drivers/vdpa/mlx5/mlx5_vdpa_steer.c
index b1bca7f0f7d..5dd9ca40ebc 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa_steer.c
+++ b/drivers/vdpa/mlx5/mlx5_vdpa_steer.c
@@ -85,9 +85,11 @@ mlx5_vdpa_rqt_prepare(struct mlx5_vdpa_priv *priv, bool is_dummy)
 			k++;
 		}
 	}
-	if (k == 0)
+	if (k == 0) {
 		/* No enabled RQ to configure for RSS. */
+		rte_free(attr);
 		return 0;
+	}
 	num = (int)k;
 	for (j = 0; k != rqt_n; ++k, ++j)
 		attr->rq_list[k] = attr->rq_list[j];
-- 
2.25.1