[alsa-devel] [PATCH 2/2] ASoC: hdac_hda: overwrite hdev type to HDA_DEV_ASOC

[Takashi Iwai]

On Sat, 27 Apr 2019 22:53:40 +0200,
Bard liao wrote:
> 
> In ASoC driver, snd_hdac_device_register() will be called by
> snd_hdac_ext_bus_device_init() and snd_hdac_device_unregister()
> will called by snd_hdac_ext_bus_device_remove(). However when
> ASoC codec driver call snd_hda_codec_device_new() to create a
> new hda codec, it will assign snd_hda_codec_dev_free() to the
> dev_free ops and snd_hda_codec_dev_free() will call
> snd_hdac_device_unregister(). As a result, snd_hdac_device_unregister()
> will be called twice in ASoC driver. To prevent it, we use hdev
> type to determine if the hda codec is registered by legacy HDA
> driver or ASoC driver and unregister device in  snd_hda_codec_dev_free()
> only if it is a legacy HDA device.
> This patch will overwrite the hdev type so that we can know it is
> a ASoC device.
> 
> Signed-off-by: Bard liao <yung-chuan.liao at linux.intel.com>

Applied, thanks.


Takashi


> ---
>  sound/soc/codecs/hdac_hda.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/sound/soc/codecs/hdac_hda.c b/sound/soc/codecs/hdac_hda.c
> index f889d94c8e3c..7d4940256914 100644
> --- a/sound/soc/codecs/hdac_hda.c
> +++ b/sound/soc/codecs/hdac_hda.c
> @@ -328,6 +328,12 @@ static int hdac_hda_codec_probe(struct snd_soc_component *component)
>  		dev_err(&hdev->dev, "failed to create hda codec %d\n", ret);
>  		goto error_no_pm;
>  	}
> +	/*
> +	 * Overwrite type to HDA_DEV_ASOC since it is a ASoC driver
> +	 * hda_codec.c will check this flag to determine if unregister
> +	 * device is needed.
> +	 */
> +	hdev->type = HDA_DEV_ASOC;
>  
>  	/*
>  	 * snd_hda_codec_device_new decrements the usage count so call get pm
> -- 
> 2.17.1
>