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authorVladimir Oltean <vladimir.oltean@nxp.com>2023-02-07 16:54:29 +0300
committerDavid S. Miller <davem@davemloft.net>2023-02-08 12:48:52 +0300
commit4c22942734f0814d3c928c25a80f48df0a6ce45e (patch)
treeee50c600a3c788f97e38212e6cc4a2d38712fc16 /net
parent92f966674f6a257eddfa60a85f9b6741d6087ccb (diff)
downloadlinux-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')
-rw-r--r--net/sched/sch_taprio.c10
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--;