diff mbox

ASoC: wm8731: harmless underflow in wm8731_put_deemph()

Message ID 20151013070857.GC31537@mwanda (mailing list archive)
State Accepted
Commit 523bade22428d4c6742dd7bfb4c0259a23bb9ec3
Headers show

Commit Message

Dan Carpenter Oct. 13, 2015, 7:08 a.m. UTC
The code tries to verify that "deemph" is zero or one, but it fails to
account for that it can be negative.  It's harmless because negatives
are treated the same as one, but we should fix it just to silence the
static checker warning.

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

Comments

Charles Keepax Oct. 13, 2015, 12:27 p.m. UTC | #1
On Tue, Oct 13, 2015 at 10:08:57AM +0300, Dan Carpenter wrote:
> The code tries to verify that "deemph" is zero or one, but it fails to
> account for that it can be negative.  It's harmless because negatives
> are treated the same as one, but we should fix it just to silence the
> static checker warning.
> 
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>

Thanks,
Charles
diff mbox

Patch

diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c
index ace8645..07cf1bd 100644
--- a/sound/soc/codecs/wm8731.c
+++ b/sound/soc/codecs/wm8731.c
@@ -132,7 +132,7 @@  static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
 {
 	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 	struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
-	int deemph = ucontrol->value.integer.value[0];
+	unsigned int deemph = ucontrol->value.integer.value[0];
 	int ret = 0;
 
 	if (deemph > 1)