From 496fb59e1274086d0c67681fb1369e9941660dd9 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Maxime=20Roussin-B=C3=A9langer?=
 <maxime.roussinbelanger@gmail.com>
Date: Tue, 31 Jul 2018 16:13:21 -0400
Subject: [PATCH] iio: light: si1133: fix uninitialized resp variable
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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>
---
 drivers/iio/light/si1133.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iio/light/si1133.c b/drivers/iio/light/si1133.c
index 5ac22c46da1f..015a21f0c2ef 100644
--- 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,
-- 
2.11.0