ASoC: wm8996: Fix negative array index read

Spotted by coverity CID 146355.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8996.c b/sound/soc/codecs/wm8996.c
index 46fe83d2b224..b70379ebd142 100644
--- a/sound/soc/codecs/wm8996.c
+++ b/sound/soc/codecs/wm8996.c
@@ -438,6 +438,8 @@ static int wm8996_get_retune_mobile_enum(struct snd_kcontrol *kcontrol,
         struct wm8996_priv *wm8996 = snd_soc_codec_get_drvdata(codec);
         int block = wm8996_get_retune_mobile_block(kcontrol->id.name);
 
+        if (block < 0)
+                return block;
         ucontrol->value.enumerated.item[0] = wm8996->retune_mobile_cfg[block];
 
         return 0;