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

As the f struct was allocated right before fl_set_parms call, 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: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/cls_flower.c

@@ -852,15 +852,11 @@ static int fl_set_parms(struct net *net, struct tcf_proto *tp,
 			unsigned long base, struct nlattr **tb,
 			struct nlattr *est, bool ovr)
 {
-	struct tcf_exts e;
 	int err;
 
-	err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0);
+	err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr);
 	if (err < 0)
 		return err;
-	err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
-	if (err < 0)
-		goto errout;
 
 	if (tb[TCA_FLOWER_CLASSID]) {
 		f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
@@ -869,17 +865,12 @@ static int fl_set_parms(struct net *net, struct tcf_proto *tp,
 
 	err = fl_set_key(net, tb, &f->key, &mask->key);
 	if (err)
-		goto errout;
+		return err;
 
 	fl_mask_update_range(mask);
 	fl_set_masked_key(&f->mkey, &f->key, mask);
 
-	tcf_exts_change(tp, &f->exts, &e);
-
 	return 0;
-errout:
-	tcf_exts_destroy(&e);
-	return err;
 }
 
 static u32 fl_grab_new_handle(struct tcf_proto *tp,