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| author | Gao Feng <gfree.wind@vip.163.com> | 2017-08-18 15:23:24 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-21 13:40:31 -0700 |
| commit | 7d3f0cd43feea1636dd7746f22fe8249b34d1b79 (patch) | |
| tree | 3b4187deb041d1d9667050bf1b64763fed79570f | |
| parent | 40501f90ed5d992176ba504910d512d9dd1b2668 (diff) | |
| download | linux-7d3f0cd43feea1636dd7746f22fe8249b34d1b79.tar.bz2 | |
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: Gao Feng <gfree.wind@vip.163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/sch_generic.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index 5865db91976b..107c52432245 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -393,6 +393,9 @@ qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) 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) |