[PATCH] net/mlx5e: Fix an error code in mlx5e_arfs_create_tables()

[Yang Li]

When the code execute 'if (!priv->fs.arfs->wq)', the value of err is 0.
So, we use -ENOMEM to indicate that the function 
create_singlethread_workqueue() return NULL.

Clean up smatch warning:
drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c:373
mlx5e_arfs_create_tables() warn: missing error code 'err'.

Reported-by: Abaci Robot <abaci@xxxxxxxxxxxxxxxxx>
Fixes: 'commit f6755b80d693 ("net/mlx5e: Dynamic alloc arfs table for netdev when needed")'
Signed-off-by: Yang Li <yang.lee@xxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c b/drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c
index 5cd466e..2949437 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c
@@ -369,8 +369,10 @@ int mlx5e_arfs_create_tables(struct mlx5e_priv *priv)
 	spin_lock_init(&priv->fs.arfs->arfs_lock);
 	INIT_LIST_HEAD(&priv->fs.arfs->rules);
 	priv->fs.arfs->wq = create_singlethread_workqueue("mlx5e_arfs");
-	if (!priv->fs.arfs->wq)
+	if (!priv->fs.arfs->wq) {
+		err = -ENOMEM;
 		goto err;
+	}
 
 	for (i = 0; i < ARFS_NUM_TYPES; i++) {
 		err = arfs_create_table(priv, i);
-- 
1.8.3.1