pkt_sched: Fix locking in shutdown_scheduler_queue()

Qdisc locks need to be held with BH disabled.

Tested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 4ac7e3a..43abd4d 100644 (file)
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -736,9 +736,9 @@ static void shutdown_scheduler_queue(struct net_device *dev,
                dev_queue->qdisc = qdisc_default;
                dev_queue->qdisc_sleeping = qdisc_default;
 
-               spin_lock(root_lock);
+               spin_lock_bh(root_lock);
                qdisc_destroy(qdisc);
-               spin_unlock(root_lock);
+               spin_unlock_bh(root_lock);
        }
 }