netdev - Re: [Patch net-next] act_mirred: use tcfm_dev in tcf_mirred_get

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Date:   Sun, 3 Dec 2017 07:39:04 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Jiri Pirko <jiri@...lanox.com>,
        Jamal Hadi Salim <jhs@...atatu.com>
Subject: Re: [Patch net-next] act_mirred: use tcfm_dev in tcf_mirred_get_dev()

Sat, Dec 02, 2017 at 08:53:20PM CET, xiyou.wangcong@...il.com wrote:
>On Sat, Dec 2, 2017 at 11:47 AM, Cong Wang <xiyou.wangcong@...il.com> wrote:
>> On Sat, Dec 2, 2017 at 12:57 AM, Jiri Pirko <jiri@...nulli.us> wrote:
>>> Good. Please also use m->tcfm_dev->ifindex in tcf_mirred_dump and
>>> tcf_mirred_ifindex. Then you can remove tcfm_ifindex completely.
>>
>> Sounds good. Will send v2.
>
>Hold on, m->tcfm_dev could be NULL, so we can't just def it here.
>
>I think we can just use 0 when it is NULL:
>
>.ifindex = m->tcfm_dev ? m->tcfm_dev->ifindex : 0,
>
>This also "fixes" the garbage ifindex dump when the target device is gone.

Sounds fine.