[PATCH v2 1/4] staging: greybus: audio: Avoid less than zero check for le32 variable

[Mark Greer]

Hi Vaibhav.

On Tue, Jan 17, 2017 at 08:19:27PM +0530, Vaibhav Agarwal wrote:
> mixer control->info call back function checks for -ve values to rebase
> min and max values. However, le32 variable is used to fetch values from
> GB module FW. Thus -ve value checking is not required. Fix this!!

nit: Please spell out "negative" so it is as easy as possible for the
     casual observer to understand what you're saying.

> Signed-off-by: Vaibhav Agarwal <vaibhav.sr at gmail.com>
> ---
>  drivers/staging/greybus/audio_topology.c | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/staging/greybus/audio_topology.c b/drivers/staging/greybus/audio_topology.c
> index 3001a4971c06..a8b63a8b2bb0 100644
> --- a/drivers/staging/greybus/audio_topology.c
> +++ b/drivers/staging/greybus/audio_topology.c
> @@ -361,8 +361,8 @@ static int gbcodec_mixer_dapm_ctl_info(struct snd_kcontrol *kcontrol,
>  	info = (struct gb_audio_ctl_elem_info *)data->info;
>  
>  	/* update uinfo */
> -	platform_max = info->value.integer.max;
> -	platform_min = info->value.integer.min;
> +	platform_max = le32_to_cpu(info->value.integer.max);
> +	platform_min = le32_to_cpu(info->value.integer.min);

Should this piece be in patch 4/4?  It seems out of place in this patch.

>  	if (platform_max == 1 &&
>  	    !strnstr(kcontrol->id.name, " Volume", NAME_SIZE))
> @@ -371,12 +371,8 @@ static int gbcodec_mixer_dapm_ctl_info(struct snd_kcontrol *kcontrol,
>  		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
>  
>  	uinfo->count = data->vcount;
> -	uinfo->value.integer.min = 0;
> -	if (info->value.integer.min < 0 &&
> -	    (uinfo->type == SNDRV_CTL_ELEM_TYPE_INTEGER))
> -		uinfo->value.integer.max = platform_max - platform_min;
> -	else
> -		uinfo->value.integer.max = platform_max;
> +	uinfo->value.integer.min = platform_min;
> +	uinfo->value.integer.max = platform_max;

This part looks good.

Thanks,

Mark
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