diff options
| author | Patrick McHardy <kaber@trash.net> | 2009-09-04 10:41:17 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-06 13:07:02 +0400 |
| commit | 5b9a9ccfad8553dbf7a9b17ba78bad70215ed0e2 (patch) | |
| tree | 1454e8121fef6635a615f6766b3fdbff678ae63d /net/sched/sch_htb.c | |
| parent | de6d5cdf881353f83006d5f3e28ac4fffd42145e (diff) | |
| download | linux-5b9a9ccfad8553dbf7a9b17ba78bad70215ed0e2.tar.xz | |
net_sched: remove some unnecessary checks in classful schedulers
The class argument to the ->graft(), ->leaf(), ->dump(), ->dump_stats() all
originate from either ->get() or ->walk() and are always valid.
Remove unnecessary checks.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_htb.c')
| -rw-r--r-- | net/sched/sch_htb.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c index ec4d46399d59..85acab9dc6fd 100644 --- a/net/sched/sch_htb.c +++ b/net/sched/sch_htb.c @@ -1117,30 +1117,29 @@ static int htb_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new, { struct htb_class *cl = (struct htb_class *)arg; - if (cl && !cl->level) { - if (new == NULL && - (new = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue, - &pfifo_qdisc_ops, - cl->common.classid)) - == NULL) - return -ENOBUFS; - sch_tree_lock(sch); - *old = cl->un.leaf.q; - cl->un.leaf.q = new; - if (*old != NULL) { - qdisc_tree_decrease_qlen(*old, (*old)->q.qlen); - qdisc_reset(*old); - } - sch_tree_unlock(sch); - return 0; + if (cl->level) + return -EINVAL; + if (new == NULL && + (new = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue, + &pfifo_qdisc_ops, + cl->common.classid)) == NULL) + return -ENOBUFS; + + sch_tree_lock(sch); + *old = cl->un.leaf.q; + cl->un.leaf.q = new; + if (*old != NULL) { + qdisc_tree_decrease_qlen(*old, (*old)->q.qlen); + qdisc_reset(*old); } - return -ENOENT; + sch_tree_unlock(sch); + return 0; } static struct Qdisc *htb_leaf(struct Qdisc *sch, unsigned long arg) { struct htb_class *cl = (struct htb_class *)arg; - return (cl && !cl->level) ? cl->un.leaf.q : NULL; + return !cl->level ? cl->un.leaf.q : NULL; } static void htb_qlen_notify(struct Qdisc *sch, unsigned long arg) |