netdev - Re: [PATCH v3 17/41] net: ieee802154: at86rf230: Call the complete helper when a transmission is over

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Message-ID: <CAB_54W71EnDyeE99UPuMoJ_EWVOSMv=_uqVz3jG=Jfz5UQMXDg@mail.gmail.com>
Date:   Mon, 17 Jan 2022 17:58:20 -0500
From:   Alexander Aring <alex.aring@...il.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Stefan Schmidt <stefan@...enfreihafen.org>,
        linux-wpan - ML <linux-wpan@...r.kernel.org>,
        "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>,
        "linux-wireless@...r.kernel.org Wireless" 
        <linux-wireless@...r.kernel.org>,
        David Girault <david.girault@...vo.com>,
        Romuald Despres <romuald.despres@...vo.com>,
        Frederic Blain <frederic.blain@...vo.com>,
        Nicolas Schodet <nico@...fr.eu.org>,
        Michael Hennerich <michael.hennerich@...log.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Varka Bhadram <varkabhadram@...il.com>,
        Xue Liu <liuxuenetmail@...il.com>, Alan Ott <alan@...nal11.us>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v3 17/41] net: ieee802154: at86rf230: Call the complete
 helper when a transmission is over

Hi,

On Mon, 17 Jan 2022 at 06:55, Miquel Raynal <miquel.raynal@...tlin.com> wrote:
>
> ieee802154_xmit_complete() is the right helper to call when a
> transmission is over. The fact that it completed or not is not really a
> question, but drivers must tell the core that the completion is over,
> even if it was canceled. Do not call ieee802154_wake_queue() manually,
> in order to let full control of this task to the core.
>

This is not a cancellation of a transmission, it is something weird
going on.  Introduce a xmit_error() for this, you call consume_skb()
which is wrong for a non error case.

> By using the complete helper we also avoid leacking the skb structure.
>

Yes, we are leaking here.

- Alex