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-rw-r--r--net/sched/sch_api.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 25aada7b095c..ff515d01951e 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -260,6 +260,9 @@ static struct Qdisc *qdisc_match_from_root(struct Qdisc *root, u32 handle)
{
struct Qdisc *q;
+ if (!qdisc_dev(root))
+ return (root->handle == handle ? root : NULL);
+
if (!(root->flags & TCQ_F_BUILTIN) &&
root->handle == handle)
return root;
@@ -1451,6 +1454,10 @@ static int tc_dump_qdisc_root(struct Qdisc *root, struct sk_buff *skb,
goto done;
q_idx++;
}
+
+ if (!qdisc_dev(root))
+ goto out;
+
hash_for_each(qdisc_dev(root)->qdisc_hash, b, q, hash) {
if (q_idx < s_q_idx) {
q_idx++;
@@ -1775,6 +1782,9 @@ static int tc_dump_tclass_root(struct Qdisc *root, struct sk_buff *skb,
if (tc_dump_tclass_qdisc(root, skb, tcm, cb, t_p, s_t) < 0)
return -1;
+ if (!qdisc_dev(root))
+ return 0;
+
hash_for_each(qdisc_dev(root)->qdisc_hash, b, q, hash) {
if (tc_dump_tclass_qdisc(q, skb, tcm, cb, t_p, s_t) < 0)
return -1;