From f241428de9d18131c194720455b359515ec70807 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Mon, 4 Dec 2017 18:40:00 -0500 Subject: [PATCH] net: sched: sch_api: rearrange init handling This patch fixes the following checkpatch error: ERROR: do not use assignment in if condition by rearranging the if condition to execute init callback only if init callback exists. The whole setup afterwards is called in any case, doesn't matter if init callback is set or not. This patch has the same behaviour as before, just without assign err variable in if condition. It also makes the code easier to read. Reviewed-by: Jamal Hadi Salim Cc: David Ahern Signed-off-by: Alexander Aring Acked-by: Jamal Hadi Salim Signed-off-by: David S. Miller --- net/sched/sch_api.c | 88 ++++++++++++++++++++++++--------------------- 1 file changed, 47 insertions(+), 41 deletions(-) diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index 8f7f5378cc336..a48ca41b7ecf5 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -1060,54 +1060,60 @@ static struct Qdisc *qdisc_create(struct net_device *dev, netdev_info(dev, "Caught tx_queue_len zero misconfig\n"); } - if (!ops->init || (err = ops->init(sch, tca[TCA_OPTIONS])) == 0) { - if (qdisc_is_percpu_stats(sch)) { - sch->cpu_bstats = - netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu); - if (!sch->cpu_bstats) - goto err_out4; - - sch->cpu_qstats = alloc_percpu(struct gnet_stats_queue); - if (!sch->cpu_qstats) - goto err_out4; - } + if (ops->init) { + err = ops->init(sch, tca[TCA_OPTIONS]); + if (err != 0) + goto err_out5; + } - if (tca[TCA_STAB]) { - stab = qdisc_get_stab(tca[TCA_STAB]); - if (IS_ERR(stab)) { - err = PTR_ERR(stab); - goto err_out4; - } - rcu_assign_pointer(sch->stab, stab); - } - if (tca[TCA_RATE]) { - seqcount_t *running; + if (qdisc_is_percpu_stats(sch)) { + sch->cpu_bstats = + netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu); + if (!sch->cpu_bstats) + goto err_out4; - err = -EOPNOTSUPP; - if (sch->flags & TCQ_F_MQROOT) - goto err_out4; + sch->cpu_qstats = alloc_percpu(struct gnet_stats_queue); + if (!sch->cpu_qstats) + goto err_out4; + } - if (sch->parent != TC_H_ROOT && - !(sch->flags & TCQ_F_INGRESS) && - (!p || !(p->flags & TCQ_F_MQROOT))) - running = qdisc_root_sleeping_running(sch); - else - running = &sch->running; - - err = gen_new_estimator(&sch->bstats, - sch->cpu_bstats, - &sch->rate_est, - NULL, - running, - tca[TCA_RATE]); - if (err) - goto err_out4; + if (tca[TCA_STAB]) { + stab = qdisc_get_stab(tca[TCA_STAB]); + if (IS_ERR(stab)) { + err = PTR_ERR(stab); + goto err_out4; } + rcu_assign_pointer(sch->stab, stab); + } + if (tca[TCA_RATE]) { + seqcount_t *running; - qdisc_hash_add(sch, false); + err = -EOPNOTSUPP; + if (sch->flags & TCQ_F_MQROOT) + goto err_out4; - return sch; + if (sch->parent != TC_H_ROOT && + !(sch->flags & TCQ_F_INGRESS) && + (!p || !(p->flags & TCQ_F_MQROOT))) + running = qdisc_root_sleeping_running(sch); + else + running = &sch->running; + + err = gen_new_estimator(&sch->bstats, + sch->cpu_bstats, + &sch->rate_est, + NULL, + running, + tca[TCA_RATE]); + if (err) + goto err_out4; } + + qdisc_hash_add(sch, false); + + return sch; + +err_out5: /* ops->init() failed, we call ->destroy() like qdisc_create_dflt() */ if (ops->destroy) ops->destroy(sch); -- 2.39.5