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net: sched: prefer qdisc_is_empty() over direct qlen access 

When checking for root qdisc queue length, do not access directly q.qlen.
In the following patches we will move back qlen accounting to per CPU
values for NOLOCK qdiscs.

Instead, prefer the qdisc_is_empty() helper usage.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2019-04-10 14:32:38 +02:00 committed by David S. Miller
parent b0a231a26d
commit 1f5e6fdd6a
1 changed files with 1 additions and 1 deletions
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2
include/net/sch_generic.h
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@ -747,7 +747,7 @@ static inline bool qdisc_all_tx_empty(const struct net_device *dev)
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
const struct Qdisc *q = rcu_dereference(txq->qdisc);
if (q->q.qlen) {
if (!qdisc_is_empty(q)) {
rcu_read_unlock();
return false;
}