[alsa-devel] [PATCH 1/3] ASoC: twl4030: don't report EBUSY if no change requested.

[Lars-Peter Clausen]

On 11/10/2014 01:45 AM, NeilBrown wrote:
> diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
> index b6b0cb399599..613b61cee081 100644
> --- a/sound/soc/codecs/twl4030.c
> +++ b/sound/soc/codecs/twl4030.c
> @@ -957,6 +957,16 @@ static int snd_soc_put_twl4030_opmode_enum_double(struct snd_kcontrol *kcontrol,
>   {
>   	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
>   	struct twl4030_priv *twl4030 = snd_soc_codec_get_drvdata(codec);
> +	struct snd_ctl_elem_value currentval;
>

snd_ctl_elem_value is a bit to big to be put onto the kernel stack. Just 
using twl4030_read() should be fine.