net-sched: fix filter destruction in atm/hfsc qdisc destruction

Filters need to be destroyed before beginning to destroy classes
since the destination class needs to still be alive to unbind the
filter.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c
index eca83a3..e817aa0 100644
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -1541,6 +1541,10 @@
 	unsigned int i;
 
 	for (i = 0; i < HFSC_HSIZE; i++) {
+		list_for_each_entry(cl, &q->clhash[i], hlist)
+			tcf_destroy_chain(&cl->filter_list);
+	}
+	for (i = 0; i < HFSC_HSIZE; i++) {
 		list_for_each_entry_safe(cl, next, &q->clhash[i], hlist)
 			hfsc_destroy_class(sch, cl);
 	}