Commit 4e6263ec authored by Zhengchao Shao's avatar Zhengchao Shao Committed by David S. Miller
Browse files

net: sched: ensure n arg not empty before call bind_class 



All bind_class callbacks are directly returned when n arg is empty.
Therefore, bind_class is invoked only when n arg is not empty.

Signed-off-by: default avatarZhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bc37b24e

net/sched/sch_api.c

+1 −1
Original line number Diff line number Diff line
@@ -1915,7 +1915,7 @@ static int tcf_node_bind(struct tcf_proto *tp, void *n, struct tcf_walker *arg) 
{

	struct tcf_bind_args *a = (void *)arg;



	if (tp->ops->bind_class) {

	if (n && tp->ops->bind_class) {

		struct Qdisc *q = tcf_block_q(tp->chain->block);



		sch_tree_lock(q);