[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <012b98b7-dd8f-2df6-6b78-a0da6dd8065a@huawei.com>
Date: Mon, 29 Aug 2022 15:00:55 +0800
From: shaozhengchao <shaozhengchao@...wei.com>
To: Cong Wang <xiyou.wangcong@...il.com>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<toke@...e.dk>, <jhs@...atatu.com>, <jiri@...nulli.us>,
<davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
<pabeni@...hat.com>, <stephen@...workplumber.org>,
<cake@...ts.bufferbloat.net>, <weiyongjun1@...wei.com>,
<yuehaibing@...wei.com>
Subject: Re: [PATCH net-next] net: sched: remove redundant NULL check in
change hook function
On 2022/8/29 13:36, Cong Wang wrote:
> On Sat, Aug 27, 2022 at 09:49:10AM +0800, Zhengchao Shao wrote:
>> Currently, the change function can be called by two ways. The one way is
>> that qdisc_change() will call it. Before calling change function,
>> qdisc_change() ensures tca[TCA_OPTIONS] is not empty. The other way is
>> that .init() will call it. The opt parameter is also checked before
>> calling change function in .init(). Therefore, it's no need to check the
>> input parameter opt in change function.
>>
>
> Right.. but the one below:
>
>> diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c
>> index c50a0853dcb9..e23d3dbb7272 100644
>> --- a/net/sched/sch_gred.c
>> +++ b/net/sched/sch_gred.c
>> @@ -413,9 +413,6 @@ static int gred_change_table_def(struct Qdisc *sch, struct nlattr *dps,
>> bool red_flags_changed;
>> int i;
>>
>> - if (!dps)
>> - return -EINVAL;
>> -
>
> I don't think anyone checks tb[TCA_GRED_DPS]. What you intended to patch
> is gred_change(), right?
>
> Thanks.
Hi Wang:
Thank you for your reply. You are right. I will send v2.
Zhengchao Shao
Powered by blists - more mailing lists