[PATCH RESEND net-next 4/5] net/sched: taprio: delete misleading comment about preallocating child qdiscs

From: Vladimir Oltean <vladimir.oltean@nxp.com>
To: netdev@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Jamal Hadi Salim <jhs@mojatatu.com>,
	Cong Wang <xiyou.wangcong@gmail.com>,
	Jiri Pirko <jiri@resnulli.us>,
	Vinicius Costa Gomes <vinicius.gomes@intel.com>,
	linux-kernel@vger.kernel.org, intel-wired-lan@lists.osuosl.org,
	Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>,
	Peilin Ye <yepeilin.cs@gmail.com>,
	Pedro Tammela <pctammela@mojatatu.com>
Subject: [PATCH RESEND net-next 4/5] net/sched: taprio: delete misleading comment about preallocating child qdiscs
Date: Fri,  2 Jun 2023 13:37:49 +0300	[thread overview]
Message-ID: <20230602103750.2290132-5-vladimir.oltean@nxp.com> (raw)
In-Reply-To: <20230602103750.2290132-1-vladimir.oltean@nxp.com>

As mentioned in commit af7b29b1deaa ("Revert "net/sched: taprio: make
qdisc_leaf() see the per-netdev-queue pfifo child qdiscs"") - unlike
mqprio, taprio doesn't use q->qdiscs[] only as a temporary transport
between Qdisc_ops :: init() and Qdisc_ops :: attach().

Delete the comment, which is just stolen from mqprio, but there, the
usage patterns are a lot different, and this is nothing but confusing.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 net/sched/sch_taprio.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c
index 263306fe38d8..cc7ff98e5e86 100644
--- a/net/sched/sch_taprio.c
+++ b/net/sched/sch_taprio.c
@@ -2084,11 +2084,8 @@ static int taprio_init(struct Qdisc *sch, struct nlattr *opt,
 		return -EOPNOTSUPP;
 	}
 
-	/* pre-allocate qdisc, attachment can't fail */
-	q->qdiscs = kcalloc(dev->num_tx_queues,
-			    sizeof(q->qdiscs[0]),
+	q->qdiscs = kcalloc(dev->num_tx_queues, sizeof(q->qdiscs[0]),
 			    GFP_KERNEL);
-
 	if (!q->qdiscs)
 		return -ENOMEM;
 
-- 
2.34.1

