[PATCH] net/sched/hfsc: allocate tcf block for hfsc root class

[Konstantin Khlebnikov]

Without this filters cannot be attached.

Signed-off-by: Konstantin Khlebnikov <khlebni...@yandex-team.ru>
Fixes: 6529eaba33f0 ("net: sched: introduce tcf block infractructure")
---
 net/sched/sch_hfsc.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c
index b52f74610dc7..3ad02bbe6903 100644
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -1428,6 +1428,10 @@ hfsc_init_qdisc(struct Qdisc *sch, struct nlattr *opt)
                return err;
        q->eligible = RB_ROOT;
 
+       err = tcf_block_get(&q->root.block, &q->root.filter_list);
+       if (err)
+               goto err_tcf;
+
        q->root.cl_common.classid = sch->handle;
        q->root.refcnt  = 1;
        q->root.sched   = q;
@@ -1447,6 +1451,10 @@ hfsc_init_qdisc(struct Qdisc *sch, struct nlattr *opt)
        qdisc_watchdog_init(&q->watchdog, sch);
 
        return 0;
+
+err_tcf:
+       qdisc_class_hash_destroy(&q->clhash);
+       return err;
 }
 
 static int