net/mlx5: CT: Fix incorrect removal of tuple_nat_node from nat rhashtable

If a non nat tuple entry is inserted just to the regular tuples
rhashtable (ct_tuples_ht) and not to natted tuples rhashtable
(ct_nat_tuples_ht). Commit bc562be9 ("net/mlx5e: CT: Save ct entries
tuples in hashtables") mixed up the return labels and names sot that on
cleanup or failure we still try to remove for the natted tuples rhashtable.

Fix that by correctly checking if a natted tuples insertion
before removing it. While here make it more readable.

Fixes: bc562be9 ("net/mlx5e: CT: Save ct entries tuples in hashtables")
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c

@@ -167,6 +167,12 @@ static const struct rhashtable_params tuples_nat_ht_params = {
 	.min_size = 16 * 1024,
 };
 
+static bool
+mlx5_tc_ct_entry_has_nat(struct mlx5_ct_entry *entry)
+{
+	return !!(entry->tuple_nat_node.next);
+}
+
 static int
 mlx5_tc_ct_rule_to_tuple(struct mlx5_ct_tuple *tuple, struct flow_rule *rule)
 {
@@ -911,13 +917,13 @@ mlx5_tc_ct_block_flow_offload_add(struct mlx5_ct_ft *ft,
 err_insert:
 	mlx5_tc_ct_entry_del_rules(ct_priv, entry);
 err_rules:
-	rhashtable_remove_fast(&ct_priv->ct_tuples_nat_ht,
-			       &entry->tuple_nat_node, tuples_nat_ht_params);
+	if (mlx5_tc_ct_entry_has_nat(entry))
+		rhashtable_remove_fast(&ct_priv->ct_tuples_nat_ht,
+				       &entry->tuple_nat_node, tuples_nat_ht_params);
 err_tuple_nat:
-	if (entry->tuple_node.next)
-		rhashtable_remove_fast(&ct_priv->ct_tuples_ht,
-				       &entry->tuple_node,
-				       tuples_ht_params);
+	rhashtable_remove_fast(&ct_priv->ct_tuples_ht,
+			       &entry->tuple_node,
+			       tuples_ht_params);
 err_tuple:
 err_set:
 	kfree(entry);
@@ -932,7 +938,7 @@ mlx5_tc_ct_del_ft_entry(struct mlx5_tc_ct_priv *ct_priv,
 {
 	mlx5_tc_ct_entry_del_rules(ct_priv, entry);
 	mutex_lock(&ct_priv->shared_counter_lock);
-	if (entry->tuple_node.next)
+	if (mlx5_tc_ct_entry_has_nat(entry))
 		rhashtable_remove_fast(&ct_priv->ct_tuples_nat_ht,
 				       &entry->tuple_nat_node,
 				       tuples_nat_ht_params);