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 0ef966d56bac300f00f1fac7aa92f54fa9949e7e..e2855ab9a2c6b5f84a4e179d254564d62cb6efff 100644 (file)
--- 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);