sch_sfq: use del_timer_sync() in sfq_destroy()

Let's delete timer reliably in sfq_destroy().

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index a20e2ef7704b..f0463d757a98 100644
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -521,7 +521,8 @@ static void sfq_destroy(struct Qdisc *sch)
         struct sfq_sched_data *q = qdisc_priv(sch);
 
         tcf_destroy_chain(q->filter_list);
-        del_timer(&q->perturb_timer);
+        q->perturb_period = 0;
+        del_timer_sync(&q->perturb_timer);
 }
 
 static int sfq_dump(struct Qdisc *sch, struct sk_buff *skb)