[PATCH net 1/3] net/mlx5e: Add null check for flow namespace in mlx5e_tc_nic_create_miss_table

[Oskar Ray-Frayssinet]

mlx5_get_flow_namespace() can return NULL if the namespace is not
available. Add a null check to prevent potential null pointer
dereference when accessing ns->node.

Signed-off-by: Oskar Ray-Frayssinet <rayfraytech@xxxxxxxxx>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 1434b65d4746..503c9cc96a02 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -5216,6 +5216,10 @@ static int mlx5e_tc_nic_create_miss_table(struct mlx5e_priv *priv)
 	ft_attr.level = MLX5E_TC_MISS_LEVEL;
 	ft_attr.prio = 0;
 	ns = mlx5_get_flow_namespace(priv->mdev, MLX5_FLOW_NAMESPACE_KERNEL);
+	if (!ns) {
+		netdev_err(priv->netdev, "failed to get flow namespace\n");
+		return -EOPNOTSUPP;
+	}
 
 	*ft = mlx5_create_auto_grouped_flow_table(ns, &ft_attr);
 	if (IS_ERR(*ft)) {
-- 
2.43.0