[PATCH 4.4 269/312] fq_codel: return non zero qlen in class dumps

[Greg Kroah-Hartman]

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

commit aafddbf0cffeb790f919436285328c762279b5d4 upstream.

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>
Acked-by: John Fastabend <john.r.fastab...@intel.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 net/sched/sch_fq_codel.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/sched/sch_fq_codel.c
+++ b/net/sched/sch_fq_codel.c
@@ -588,7 +588,7 @@ static int fq_codel_dump_class_stats(str
                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));