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Commit 7d3f0cd4 authored by Gao Feng's avatar Gao Feng Committed by David S. Miller
Browse files

net: sched: Add the invalid handle check in qdisc_class_find 



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: default avatarGao Feng <gfree.wind@vip.163.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 40501f90

include/net/sch_generic.h

+3 −0
Original line number Original line Diff line number Diff line
@@ -393,6 +393,9 @@ qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) 
	struct Qdisc_class_common *cl;

	struct Qdisc_class_common *cl;

	unsigned int h;

	unsigned int h;





	if (!id)

		return NULL;



	h = qdisc_class_hash(id, hash->hashmask);

	h = qdisc_class_hash(id, hash->hashmask);

	hlist_for_each_entry(cl, &hash->hash[h], hnode) {

	hlist_for_each_entry(cl, &hash->hash[h], hnode) {

		if (cl->classid == id)

		if (cl->classid == id)