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-rw-r--r--kernel/net/sched/sch_fifo.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/net/sched/sch_fifo.c b/kernel/net/sched/sch_fifo.c
index 2177eac0a..2e4bd2c0a 100644
--- a/kernel/net/sched/sch_fifo.c
+++ b/kernel/net/sched/sch_fifo.c
@@ -37,14 +37,18 @@ static int pfifo_enqueue(struct sk_buff *skb, struct Qdisc *sch)
static int pfifo_tail_enqueue(struct sk_buff *skb, struct Qdisc *sch)
{
+ 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);
qdisc_qstats_drop(sch);
qdisc_enqueue_tail(skb, sch);
+ qdisc_tree_reduce_backlog(sch, 0, prev_backlog - sch->qstats.backlog);
return NET_XMIT_CN;
}