1 files changed, 4 insertions, 0 deletions

diff --git a/net/sched/sch_fifo.c b/net/sched/sch_fifo.c
index 6ea0db427f91..baeed6a78d28 100644
--- a/net/sched/sch_fifo.c
+++ b/net/sched/sch_fifo.c
@@ -40,14 +40,18 @@ static int pfifo_enqueue(struct sk_buff *skb, struct Qdisc *sch,
 static int pfifo_tail_enqueue(struct sk_buff *skb, struct Qdisc *sch,
                               struct sk_buff **to_free)
 {
+        unsigned int prev_backlog;
+
         if (likely(skb_queue_len(&sch->q) < sch->limit))
                 return qdisc_enqueue_tail(skb, sch);
 
+        prev_backlog = sch->qstats.backlog;
         /* queue full, remove one skb to fulfill the limit */
         __qdisc_queue_drop_head(sch, &sch->q, to_free);
         qdisc_qstats_drop(sch);
         qdisc_enqueue_tail(skb, sch);
 
+        qdisc_tree_reduce_backlog(sch, 0, prev_backlog - sch->qstats.backlog);
         return NET_XMIT_CN;
 }