iio: light: si1133: fix uninitialized resp variable

Read response register to detect any error.

Signed-off-by: Maxime Roussin-Bélanger <maxime.roussinbelanger@gmail.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/light/si1133.c b/drivers/iio/light/si1133.c
index 5ac22c4..015a21f 100644 (file)
--- a/drivers/iio/light/si1133.c
+++ b/drivers/iio/light/si1133.c
@@ -409,6 +409,9 @@ static int si1133_command(struct si1133_data *data, u8 cmd)
                        err = -ETIMEDOUT;
                        goto out;
                }
+               err = regmap_read(data->regmap, SI1133_REG_RESPONSE0, &resp);
+               if (err)
+                       goto out;
        } else {
                err = regmap_read_poll_timeout(data->regmap,
                                               SI1133_REG_RESPONSE0, resp,