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| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2023-02-07 16:54:29 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-02-08 12:48:52 +0300 |
| commit | 4c22942734f0814d3c928c25a80f48df0a6ce45e (patch) | |
| tree | ee50c600a3c788f97e38212e6cc4a2d38712fc16 /net/sched/sch_taprio.c | |
| parent | 92f966674f6a257eddfa60a85f9b6741d6087ccb (diff) | |
| download | linux-4c22942734f0814d3c928c25a80f48df0a6ce45e.tar.xz | |
net/sched: taprio: avoid calling child->ops->dequeue(child) twice
Simplify taprio_dequeue_from_txq() by noticing that we can goto one call
earlier than the previous skb_found label. This is possible because
we've unified the treatment of the child->ops->dequeue(child) return
call, we always try other TXQs now, instead of abandoning the root
dequeue completely if we failed in the peek() case.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_taprio.c')
| -rw-r--r-- | net/sched/sch_taprio.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c index 272a8b7c0f9f..a3770d599a84 100644 --- a/net/sched/sch_taprio.c +++ b/net/sched/sch_taprio.c @@ -528,12 +528,8 @@ static struct sk_buff *taprio_dequeue_from_txq(struct Qdisc *sch, int txq, if (unlikely(!child)) return NULL; - if (TXTIME_ASSIST_IS_ENABLED(q->flags)) { - skb = child->ops->dequeue(child); - if (!skb) - return NULL; - goto skb_found; - } + if (TXTIME_ASSIST_IS_ENABLED(q->flags)) + goto skip_peek_checks; skb = child->ops->peek(child); if (!skb) @@ -560,11 +556,11 @@ static struct sk_buff *taprio_dequeue_from_txq(struct Qdisc *sch, int txq, atomic_sub_return(len, &entry->budget) < 0) return NULL; +skip_peek_checks: skb = child->ops->dequeue(child); if (unlikely(!skb)) return NULL; -skb_found: qdisc_bstats_update(sch, skb); qdisc_qstats_backlog_dec(sch, skb); sch->q.qlen--; |