[patch] ASoC: wm8955: harmless underflow in wm8955_put_deemph()

Dan Carpenter
2015-10-13T07:10:48Z

Valid values for "deemph" are zero and one, but we mistakenly allow
negative values as well. It's harmless but we may as well clean it up.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/sound/soc/codecs/wm8955.c b/sound/soc/codecs/wm8955.c
index 12e4435..9db00d5 100644
--- a/sound/soc/codecs/wm8955.c
+++ b/sound/soc/codecs/wm8955.c
@@ -402,7 +402,7 @@ static int wm8955_put_deemph(struct snd_kcontrol *kcontrol,
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
- int deemph = ucontrol->value.integer.value[0];
+ unsigned int deemph = ucontrol->value.integer.value[0];

if (deemph > 1)
return -EINVAL;