[NET_SCHED]: sch_cbq: fix cbq_undelay_prio for non-active priorites

cbq_undelay_prio is supposed to return a time delta, but returns the
current time for non-active priorities, causing cbq_undelay to mark
the priority as active and schedule a timer for twice the current
time.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index d29d1212934d..32f6a308bad6 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -612,7 +612,7 @@ static unsigned long cbq_undelay_prio(struct cbq_sched_data *q, int prio)
         unsigned long sched = now;
 
         if (cl_prev == NULL)
-                return now;
+                return 0;
 
         do {
                 cl = cl_prev->next_alive;