linux-kernel - Re: [alsa-devel] [PATCH] Revert "ASoC: core: replace aux_comp_list to component_dev

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Message-ID: <92ff85cb-ba21-07b8-c26c-a86de73b786f@cogentembedded.com>
Date:   Thu, 29 Dec 2016 19:20:45 +0300
From:   Nikita Yushchenko <nikita.yoush@...entembedded.com>
To:     Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Chris Healy <cphealy@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH] Revert "ASoC: core: replace aux_comp_list to
 component_dev_list"

>> This reverts commit 1a653aa44725668590b36bbe2d7fe4736a69f055 ("ASoC:
>> core: replace aux_comp_list to component_dev_list").
>>
>> That commit tries to remove card->aux_comp_list, using flagged entries
>> in card->component_dev_list instead.
>>
>> However, components are added to card->component_dev_list in
>> soc_probe_component(), which is called for aux devices by
>> soc_probe_aux_devices(). Before that commit, it traversed
>> card->aux_comp_list and found aux devices added by soc_bind_aux_dev().
>> After that commit, it traverses card->component_dev_list and finds no
>> aux devices, because soc_probe_component() was not yet called for them.
>>
>> Thus all aux devices are lost and any setup that needs them no longer
>> works.
> 
> I think we can't simply revert that commit now, after commit
> 
> 9178feb ASoC: add Component level suspend/resume
> component_dev_list is also used for the component level suspend/resume,
> if auxiliary devices would have been on a separate list they would be
> missed in the suspend/resume sequences.

I believe aux devices are on both lists.