[PATCH v2] catpt: Switch to use list_entry_is_head() helper

[Andy Shevchenko]

On Mon, Dec 14, 2020 at 07:21:38PM +0200, Andy Shevchenko wrote:
> Since we got list_entry_is_head() helper in the generic header,
> we may switch catpt to use it. It removes the need in additional variable.

Mark, should I resend?

> Signed-off-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
> Reviewed-by: Cezary Rojewski <cezary.rojewski at intel.com>
> ---
> v2: left the structure definition at its initial location (Cezary)
>  sound/soc/intel/catpt/pcm.c | 12 +++++-------
>  1 file changed, 5 insertions(+), 7 deletions(-)
> 
> diff --git a/sound/soc/intel/catpt/pcm.c b/sound/soc/intel/catpt/pcm.c
> index e5d54bb1c42a..9d304b3a817f 100644
> --- a/sound/soc/intel/catpt/pcm.c
> +++ b/sound/soc/intel/catpt/pcm.c
> @@ -331,7 +331,7 @@ static int catpt_dai_apply_usettings(struct snd_soc_dai *dai,
>  {
>  	struct catpt_dev *cdev = dev_get_drvdata(dai->dev);
>  	struct snd_soc_component *component = dai->component;
> -	struct snd_kcontrol *pos, *kctl = NULL;
> +	struct snd_kcontrol *pos;
>  	const char *name;
>  	int ret;
>  	u32 id = stream->info.stream_hw_id;
> @@ -356,17 +356,15 @@ static int catpt_dai_apply_usettings(struct snd_soc_dai *dai,
>  
>  	list_for_each_entry(pos, &component->card->snd_card->controls, list) {
>  		if (pos->private_data == component &&
> -		    !strncmp(name, pos->id.name, sizeof(pos->id.name))) {
> -			kctl = pos;
> +		    !strncmp(name, pos->id.name, sizeof(pos->id.name)))
>  			break;
> -		}
>  	}
> -	if (!kctl)
> +	if (list_entry_is_head(pos, &component->card->snd_card->controls, list))
>  		return -ENOENT;
>  
>  	if (stream->template->type != CATPT_STRM_TYPE_LOOPBACK)
> -		return catpt_set_dspvol(cdev, id, (long *)kctl->private_value);
> -	ret = catpt_ipc_mute_loopback(cdev, id, *(bool *)kctl->private_value);
> +		return catpt_set_dspvol(cdev, id, (long *)pos->private_value);
> +	ret = catpt_ipc_mute_loopback(cdev, id, *(bool *)pos->private_value);
>  	if (ret)
>  		return CATPT_IPC_ERROR(ret);
>  	return 0;
> -- 
> 2.29.2
> 

-- 
With Best Regards,
Andy Shevchenko