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>

diff --git a/sound/soc/codecs/wm8996.c b/sound/soc/codecs/wm8996.c
index 46fe83d2b2242610799180edd6774c0dc3cfe674..b70379ebd1428c2c572b11ca5d2257615d3a2404 100644 (file)
--- 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;