[PATCH net] fq_codel: return non zero qlen in class dumps

[Eric Dumazet]

From: Eric Dumazet <eduma...@google.com>

We properly scan the flow list to count number of packets,
but John passed 0 to gnet_stats_copy_queue() so we report
a zero value to user space instead of the result.

Fixes: 640158536632 ("net: sched: restrict use of qstats qlen")
Signed-off-by: Eric Dumazet <eduma...@google.com>
Cc: John Fastabend <john.r.fastab...@intel.com>
---
 net/sched/sch_fq_codel.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sched/sch_fq_codel.c b/net/sched/sch_fq_codel.c
index 6883a8971562..7a280360aeed 100644
--- a/net/sched/sch_fq_codel.c
+++ b/net/sched/sch_fq_codel.c
@@ -649,7 +649,7 @@ static int fq_codel_dump_class_stats(struct Qdisc *sch, 
unsigned long cl,
                qs.backlog = q->backlogs[idx];
                qs.drops = flow->dropped;
        }
-       if (gnet_stats_copy_queue(d, NULL, &qs, 0) < 0)
+       if (gnet_stats_copy_queue(d, NULL, &qs, qs.qlen) < 0)
                return -1;
        if (idx < q->flows_cnt)
                return gnet_stats_copy_app(d, &xstats, sizeof(xstats));