net: sched: cls_cgroup: no need to call tcf_exts_change for newly allocated struct

As the new struct just was allocated, so no need to use tcf_exts_change
to do atomic change, and we can just fill-up the unused exts struct
directly by tcf_exts_validate.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sched/cls_cgroup.c

@@ -76,7 +76,6 @@ static int cls_cgroup_change(struct net *net, struct sk_buff *in_skb,
 	struct nlattr *tb[TCA_CGROUP_MAX + 1];
 	struct cls_cgroup_head *head = rtnl_dereference(tp->root);
 	struct cls_cgroup_head *new;
-	struct tcf_exts e;
 	int err;
 
 	if (!tca[TCA_OPTIONS])
@@ -102,22 +101,13 @@ static int cls_cgroup_change(struct net *net, struct sk_buff *in_skb,
 	if (err < 0)
 		goto errout;
 
-	err = tcf_exts_init(&e, TCA_CGROUP_ACT, TCA_CGROUP_POLICE);
+	err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &new->exts, ovr);
 	if (err < 0)
 		goto errout;
-	err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr);
-	if (err < 0) {
-		tcf_exts_destroy(&e);
-		goto errout;
-	}
 
 	err = tcf_em_tree_validate(tp, tb[TCA_CGROUP_EMATCHES], &new->ematches);
-	if (err < 0) {
-		tcf_exts_destroy(&e);
+	if (err < 0)
 		goto errout;
-	}
-
-	tcf_exts_change(tp, &new->exts, &e);
 
 	rcu_assign_pointer(tp->root, new);
 	if (head)