[PATCH] ASoC: rt5651: Variable "ret" in function rt5651_i2c_probe() could be uninitialized

[Yizhuo]

In function rt5651_i2c_probe(), local variable "ret" could
be uninitialized if function regmap_read() returns -EINVAL.
However, this value is used in if statement. This is
potentially unsafe.

Signed-off-by: Yizhuo <yzhai...@ucr.edu>
---
 sound/soc/codecs/rt5651.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/rt5651.c b/sound/soc/codecs/rt5651.c
index da60b28ba3df..8d6cbc6b6ff0 100644
--- a/sound/soc/codecs/rt5651.c
+++ b/sound/soc/codecs/rt5651.c
@@ -1734,6 +1734,7 @@ static int rt5651_i2c_probe(struct i2c_client *i2c,
        struct rt5651_platform_data *pdata = dev_get_platdata(&i2c->dev);
        struct rt5651_priv *rt5651;
        int ret;
+       int err;
 
        rt5651 = devm_kzalloc(&i2c->dev, sizeof(*rt5651),
                                GFP_KERNEL);
@@ -1755,7 +1756,10 @@ static int rt5651_i2c_probe(struct i2c_client *i2c,
                return ret;
        }
 
-       regmap_read(rt5651->regmap, RT5651_DEVICE_ID, &ret);
+       err = regmap_read(rt5651->regmap, RT5651_DEVICE_ID, &ret);
+       if (err)
+               return err;
+
        if (ret != RT5651_DEVICE_ID_VALUE) {
                dev_err(&i2c->dev,
                        "Device with ID register %#x is not rt5651\n", ret);
-- 
2.17.1