[PKT_SCHED] sch_prio: fix qdisc bands init

Currently when PRIO is configured to use N bands, it lets the packets be
directed to any of the bands 0..N-1. However, PRIO attaches a fifo qdisc
only to the bands that appear in the priomap; the rest of the N bands
remain with a noop qdisc attached. This patch changes PRIO's behavior so
that it attaches a fifo qdisc to all of the N bands.

Signed-off-by: Amnon Aaronsohn <bla@cs.huji.ac.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 4 deletions

diff --git a/net/sched/sch_prio.c b/net/sched/sch_prio.c
index 5b3a3e48ed92..1641db33a994 100644
--- a/net/sched/sch_prio.c
+++ b/net/sched/sch_prio.c
@@ -228,14 +228,13 @@ static int prio_tune(struct Qdisc *sch, struct rtattr *opt)
         }
         sch_tree_unlock(sch);
 
-        for (i=0; i<=TC_PRIO_MAX; i++) {
-                int band = q->prio2band[i];
-                if (q->queues[band] == &noop_qdisc) {
+        for (i=0; i<q->bands; i++) {
+                if (q->queues[i] == &noop_qdisc) {
                         struct Qdisc *child;
                         child = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops);
                         if (child) {
                                 sch_tree_lock(sch);
-                                child = xchg(&q->queues[band], child);
+                                child = xchg(&q->queues[i], child);
 
                                 if (child != &noop_qdisc)
                                         qdisc_destroy(child);