1 files changed, 5 insertions, 0 deletions

diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 8c01e023f02e..87e48a4e1051 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -179,6 +179,7 @@ requeue:
                 netif_schedule(dev);
                 return 1;
         }
+        BUG_ON((int) q->q.qlen < 0);
         return q->q.qlen;
 }
 
@@ -539,6 +540,10 @@ void dev_activate(struct net_device *dev)
                 write_unlock_bh(&qdisc_tree_lock);
         }
 
+        if (!netif_carrier_ok(dev))
+                /* Delay activation until next carrier-on event */
+                return;
+
         spin_lock_bh(&dev->queue_lock);
         rcu_assign_pointer(dev->qdisc, dev->qdisc_sleeping);
         if (dev->qdisc != &noqueue_qdisc) {