[Patch net-next] sched, act: allow to clear all actions as well

[Cong Wang <xiyou.wangcong@gmail.com>]

From: Cong Wang <cwang@twopensource.com>

When we change the list of action on a given filter, currently we don't
change it to empty. This is a bug, we should allow to change to whatever
users given.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
---
 net/sched/cls_api.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 6786130..a481bbe 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -544,14 +544,12 @@ void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
 		     struct tcf_exts *src)
 {
 #ifdef CONFIG_NET_CLS_ACT
-	if (!list_empty(&src->actions)) {
-		LIST_HEAD(tmp);
-		tcf_tree_lock(tp);
-		list_splice_init(&dst->actions, &tmp);
-		list_splice(&src->actions, &dst->actions);
-		tcf_tree_unlock(tp);
-		tcf_action_destroy(&tmp, TCA_ACT_UNBIND);
-	}
+	LIST_HEAD(tmp);
+	tcf_tree_lock(tp);
+	list_splice_init(&dst->actions, &tmp);
+	list_splice(&src->actions, &dst->actions);
+	tcf_tree_unlock(tp);
+	tcf_action_destroy(&tmp, TCA_ACT_UNBIND);
 #endif
 }
 EXPORT_SYMBOL(tcf_exts_change);
-- 
1.8.3.1