From: Yizhuo <yzhai003@ucr.edu>
Date: Thu, 3 Jan 2019 21:59:12 +0000 (-0800)
Subject: ASoC: Variable "val" in function rt274_i2c_probe() could be uninitialized
X-Git-Tag: v5.0-rc4~26^2~1^2~14
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=8c3590de0a378c2449fc1aec127cc693632458e4;p=linux.git

ASoC: Variable "val" in function rt274_i2c_probe() could be uninitialized

Inside function rt274_i2c_probe(), if regmap_read() function
returns -EINVAL, then local variable "val" leaves uninitialized
but used in if statement. This is potentially unsafe.

Signed-off-by: Yizhuo <yzhai003@ucr.edu>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/sound/soc/codecs/rt274.c b/sound/soc/codecs/rt274.c
index 0ef966d56bac..e2855ab9a2c6 100644
--- a/sound/soc/codecs/rt274.c
+++ b/sound/soc/codecs/rt274.c
@@ -1128,8 +1128,11 @@ static int rt274_i2c_probe(struct i2c_client *i2c,
 		return ret;
 	}
 
-	regmap_read(rt274->regmap,
+	ret = regmap_read(rt274->regmap,
 		RT274_GET_PARAM(AC_NODE_ROOT, AC_PAR_VENDOR_ID), &val);
+	if (ret)
+		return ret;
+
 	if (val != RT274_VENDOR_ID) {
 		dev_err(&i2c->dev,
 			"Device with ID register %#x is not rt274\n", val);