[PATCH 2/3] ASoC: mt6358: Validate Wake on Voice 2 writes

[Mark Brown]

Currently the Wake on Voice 2 control accepts and stores any value written
but it reports that only 0 and 1 are valid values. Reject any out of range
values written by userspace.

Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/codecs/mt6358.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/codecs/mt6358.c b/sound/soc/codecs/mt6358.c
index 9004377461f7..89d0dcb2635b 100644
--- a/sound/soc/codecs/mt6358.c
+++ b/sound/soc/codecs/mt6358.c
@@ -560,6 +560,9 @@ static int mt6358_put_wov(struct snd_kcontrol *kcontrol,
 	struct mt6358_priv *priv = snd_soc_component_get_drvdata(c);
 	int enabled = ucontrol->value.integer.value[0];
 
+	if (enabled < 0 || enabled > 1)
+		return -EINVAL;
+
 	if (priv->wov_enabled != enabled) {
 		if (enabled)
 			mt6358_enable_wov_phase2(priv);

-- 
2.30.2