linux-kernel - Re: [PATCH 1/4] ASoC: codec2codec: avoid invalid/double-free of pcm runtime

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Message-ID: <1jo8u2a9rl.fsf@starbuckisacylon.baylibre.com>
Date:   Thu, 13 Feb 2020 14:37:18 +0100
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Samuel Holland <samuel@...lland.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Jonathan Corbet <corbet@....net>, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 1/4] ASoC: codec2codec: avoid invalid/double-free of pcm runtime


On Thu 13 Feb 2020 at 12:37, Mark Brown <broonie@...nel.org> wrote:

> On Thu, Feb 13, 2020 at 09:37:18AM +0100, Jerome Brunet wrote:
>
>> This brings another question/problem:
>> A link which has failed in PMU, could try in PMD to hw_free/shutdown a
>> dai which has not gone through startup/hw_params, right ?
>
> I think so, yes.

Maybe this can be solved using the dai active counts which the
codec-to-codec event is not updating. I'll try to come up with
something.