[PATCH net-next 2/2] net/mlx5: HWS, shrink FTE action array to fit

[Alexandre Cassen <acassen@corp.free.fr>]

An FTE keeps the actions it must release in the array used to build
them. This is a 1 KB allocation sized for MLX5_FLOW_CONTEXT_ACTION_MAX
entries while a rule rarely needs more than three. Keep a copy sized to
the actions in use.

Signed-off-by: Alexandre Cassen <acassen@corp.free.fr>
---
 .../ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c  | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c
index 5a172c572a68..da6e57c103d6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c
@@ -746,6 +746,7 @@ static int mlx5_fs_fte_get_hws_actions(struct mlx5_flow_root_namespace *ns,
 	struct mlx5_fs_hws_context *fs_ctx = &ns->fs_hws_context;
 	struct mlx5hws_action_dest_attr *dest_actions;
 	struct mlx5hws_context *ctx = fs_ctx->hws_ctx;
+	struct mlx5_fs_hws_rule_action *rule_actions;
 	struct mlx5_fs_hws_rule_action *fs_actions;
 	struct mlx5_core_dev *dev = ns->dev;
 	struct mlx5hws_action *dest_action;
@@ -1041,13 +1042,20 @@ static int mlx5_fs_fte_get_hws_actions(struct mlx5_flow_root_namespace *ns,
 	fs_actions[num_fs_actions++].action = tmp_action;
 	(*ractions)[num_actions++].action = tmp_action;
 
+	rule_actions = kmemdup_array(fs_actions, num_fs_actions,
+				     sizeof(*fs_actions), GFP_KERNEL);
+	if (!rule_actions) {
+		err = -ENOMEM;
+		goto free_actions;
+	}
+	kfree(fs_actions);
 	kfree(dest_actions);
 
 	/* Actions created specifically for this rule will be destroyed
 	 * once rule is deleted.
 	 */
 	fte->fs_hws_rule.num_fs_actions = num_fs_actions;
-	fte->fs_hws_rule.hws_fs_actions = fs_actions;
+	fte->fs_hws_rule.hws_fs_actions = rule_actions;
 
 	return 0;
 
-- 
2.43.0