6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lion Ackermann <nnamrec@xxxxxxxxx>
commit 5eb7de8cd58e73851cd37ff8d0666517d9926948 upstream.
Changes to sch->q.qlen around qdisc_tree_reduce_backlog() need to happen
_before_ a call to said function because otherwise it may fail to notify
parent qdiscs when the child is about to become empty.
Signed-off-by: Lion Ackermann <nnamrec@xxxxxxxxx>
Acked-by: Toke Høiland-Jørgensen <toke@xxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Artem Metla <ametla@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/sched/sch_cake.c | 2 +-
net/sched/sch_choke.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- a/net/sched/sch_cake.c
+++ b/net/sched/sch_cake.c
@@ -1525,7 +1525,6 @@ static unsigned int cake_drop(struct Qdi
b->backlogs[idx] -= len;
b->tin_backlog -= len;
sch->qstats.backlog -= len;
- qdisc_tree_reduce_backlog(sch, 1, len);
flow->dropped++;
b->tin_dropped++;
@@ -1536,6 +1535,7 @@ static unsigned int cake_drop(struct Qdi
__qdisc_drop(skb, to_free);
sch->q.qlen--;
+ qdisc_tree_reduce_backlog(sch, 1, len);
cake_heapify(q, 0);
--- a/net/sched/sch_choke.c
+++ b/net/sched/sch_choke.c
@@ -123,10 +123,10 @@ static void choke_drop_by_idx(struct Qdi
if (idx == q->tail)
choke_zap_tail_holes(q);
+ --sch->q.qlen;
qdisc_qstats_backlog_dec(sch, skb);
qdisc_tree_reduce_backlog(sch, 1, qdisc_pkt_len(skb));
qdisc_drop(skb, sch, to_free);
- --sch->q.qlen;
}
struct choke_skb_cb {
