[rdma-next] RDMA/mlx4: Avoid false error about access to uninitialized gids array

Commit Message

Leon Romanovsky Dec. 3, 2024, 1:44 p.m. UTC

From: Leon Romanovsky <[e-mail]>

Smatch generates the following false error report:
drivers/infiniband/hw/mlx4/main.c:393 mlx4_ib_del_gid() error: uninitialized symbol 'gids'.

Traditionally, we are not changing kernel code and asking people to fix
the tools. However in this case, the fix can be done by simply rearranging
the code to be more clear.

Fixes: e26be1bfef81 ("IB/mlx4: Implement ib_device callbacks")
Signed-off-by: Leon Romanovsky <[e-mail]>
---
 drivers/infiniband/hw/mlx4/main.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 529db874d67c..b1bbdcff631d 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -351,7 +351,7 @@  static int mlx4_ib_del_gid(const struct ib_gid_attr *attr, void **context)
 	struct mlx4_port_gid_table   *port_gid_table;
 	int ret = 0;
 	int hw_update = 0;
-	struct gid_entry *gids;
+	struct gid_entry *gids = NULL;
 
 	if (!rdma_cap_roce_gid_table(attr->device, attr->port_num))
 		return -EINVAL;
@@ -389,10 +389,10 @@  static int mlx4_ib_del_gid(const struct ib_gid_attr *attr, void **context)
 	}
 	spin_unlock_bh(&iboe->lock);
 
-	if (!ret && hw_update) {
+	if (gids)
 		ret = mlx4_ib_update_gids(gids, ibdev, attr->port_num);
-		kfree(gids);
-	}
+
+	kfree(gids);
 	return ret;
 }