From: Axel Lin <axel.lin@ingics.com>
Date: Wed, 6 Aug 2014 00:28:46 +0000 (+0800)
Subject: hwmon: (w83793) Fix vrm write operation
X-Git-Tag: firefly_0821_release~176^2~3393^2~1
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2aeee04df8e0ea4d5b91da630687af1a1d93c941;p=firefly-linux-kernel-4.4.55.git

hwmon: (w83793) Fix vrm write operation

vrm is an u8, so the written value needs to be limited to [0, 255].

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---

diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
index 9d63d71214ca..816aa6caf5d5 100644
--- a/drivers/hwmon/w83793.c
+++ b/drivers/hwmon/w83793.c
@@ -353,6 +353,9 @@ store_vrm(struct device *dev, struct device_attribute *attr,
 	if (err)
 		return err;
 
+	if (val > 255)
+		return -EINVAL;
+
 	data->vrm = val;
 	return count;
 }