From: Gao Feng <gfree.w...@vip.163.com>
Add the invalid handle "0" check to avoid unnecessary search, because
the qdisc uses the skb->priority as the handle value to look up, and
it is "0" usually.
Signed-off-by: Gao Feng <gfree.w...@vip.163.com>
---
include/net/sch_generic.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 5865db9..107c524 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -393,6 +393,9 @@ static inline unsigned int qdisc_class_hash(u32 id, u32
mask)
struct Qdisc_class_common *cl;
unsigned int h;
+ if (!id)
+ return NULL;
+
h = qdisc_class_hash(id, hash->hashmask);
hlist_for_each_entry(cl, &hash->hash[h], hnode) {
if (cl->classid == id)
--
1.9.1
