1 files changed, 12 insertions, 1 deletions

diff --git a/net/sched/sch_fifo.c b/net/sched/sch_fifo.c
index b3075f8a196b..f7290d2542c2 100644
--- a/net/sched/sch_fifo.c
+++ b/net/sched/sch_fifo.c
@@ -64,11 +64,13 @@ static int pfifo_tail_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 static int fifo_init(struct Qdisc *sch, struct nlattr *opt)
 {
         struct fifo_sched_data *q = qdisc_priv(sch);
+        bool bypass;
+        bool is_bfifo = sch->ops == &bfifo_qdisc_ops;
 
         if (opt == NULL) {
                 u32 limit = qdisc_dev(sch)->tx_queue_len ? : 1;
 
-                if (sch->ops == &bfifo_qdisc_ops)
+                if (is_bfifo)
                         limit *= psched_mtu(qdisc_dev(sch));
 
                 q->limit = limit;
@@ -81,6 +83,15 @@ static int fifo_init(struct Qdisc *sch, struct nlattr *opt)
                 q->limit = ctl->limit;
         }
 
+        if (is_bfifo)
+                bypass = q->limit >= psched_mtu(qdisc_dev(sch));
+        else
+                bypass = q->limit >= 1;
+
+        if (bypass)
+                sch->flags |= TCQ_F_CAN_BYPASS;
+        else
+                sch->flags &= ~TCQ_F_CAN_BYPASS;
         return 0;
 }