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net/sched: taprio: don't overwrite "sch" variable in taprio_dump_class_stats()

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In taprio_dump_class_stats() we don't need a reference to the root Qdisc
once we get the reference to the child corresponding to this traffic
class, so it's okay to overwrite "sch". But in a future patch we will
need the root Qdisc too, so create a dedicated "child" pointer variable
to hold the child reference. This also makes the code adhere to a more
conventional coding style.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2023-05-30 12:19:44 +03:00 • committed by David S. Miller
parent 5dedf5c485
commit dced11ef84
1 changed files with 3 additions and 3 deletions
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6
net/sched/sch_taprio.c
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@ -2388,10 +2388,10 @@ static int taprio_dump_class_stats(struct Qdisc *sch, unsigned long cl,
__acquires(d->lock) __acquires(d->lock)
{ {
struct netdev_queue *dev_queue = taprio_queue_get(sch, cl); struct netdev_queue *dev_queue = taprio_queue_get(sch, cl);
struct Qdisc *child = dev_queue->qdisc_sleeping;
sch = dev_queue->qdisc_sleeping; if (gnet_stats_copy_basic(d, NULL, &child->bstats, true) < 0 ||
if (gnet_stats_copy_basic(d, NULL, &sch->bstats, true) < 0 || qdisc_qstats_copy(d, child) < 0)
qdisc_qstats_copy(d, sch) < 0)
return -1; return -1;
return 0; return 0;
} }