linux-kernel - Re: [PATCH 1/2] ASoC: wcd9335: fix order of Slimbus unprepare/disable

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <af3bd3f4-dcd9-8f6c-6323-de1b53301225@linaro.org>
Date:   Wed, 21 Sep 2022 17:06:49 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Banajit Goswami <bgoswami@...cinc.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, Vinod Koul <vkoul@...nel.org>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Cc:     stable@...r.kernel.org
Subject: Re: [PATCH 1/2] ASoC: wcd9335: fix order of Slimbus unprepare/disable

On 21/09/2022 17:05, Pierre-Louis Bossart wrote:
>> diff --git a/sound/soc/codecs/wcd9335.c b/sound/soc/codecs/wcd9335.c
>> index 06c6adbe5920..d2548fdf9ae5 100644
>> --- a/sound/soc/codecs/wcd9335.c
>> +++ b/sound/soc/codecs/wcd9335.c
>> @@ -1972,8 +1972,8 @@ static int wcd9335_trigger(struct snd_pcm_substream *substream, int cmd,
>>  	case SNDRV_PCM_TRIGGER_STOP:
>>  	case SNDRV_PCM_TRIGGER_SUSPEND:
>>  	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
>> -		slim_stream_unprepare(dai_data->sruntime);
>>  		slim_stream_disable(dai_data->sruntime);
>> +		slim_stream_unprepare(dai_data->sruntime);
> 
> This looks logical but different from what the kernel doc says:
> 
> /**
>  * slim_stream_disable() - Disable a SLIMbus Stream
>  *
>  * @stream: instance of slim stream runtime to disable
>  *
>  * This API will disable all the ports and channels associated with
>  * SLIMbus stream
>  *
>  * Return: zero on success and error code on failure. From ASoC DPCM
> framework,
>  * this state is linked to trigger() pause operation.
>  */
> 
> /**
>  * slim_stream_unprepare() - Un-prepare a SLIMbus Stream
>  *
>  * @stream: instance of slim stream runtime to unprepare
>  *
>  * This API will un allocate all the ports and channels associated with
>  * SLIMbus stream

You mean this piece of doc? Indeed looks inaccurate. I'll update it.

Best regards,
Krzysztof