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-rw-r--r--net/sched/sch_htb.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 83f5e69243c..3a119f576bb 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -1100,7 +1100,9 @@ static int htb_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
== NULL)
return -ENOBUFS;
sch_tree_lock(sch);
- if ((*old = xchg(&cl->un.leaf.q, new)) != NULL) {
+ *old = cl->un.leaf.q;
+ cl->un.leaf.q = new;
+ if (*old != NULL) {
qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
qdisc_reset(*old);
}