From: Axel Lin <axel.lin@ingics.com>
Date: Wed, 6 Aug 2014 00:24:00 +0000 (+0800)
Subject: hwmon: (lm87) Fix vrm write operation
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=fa642d9d6e502fbdbd1122a6a247c8ad17063a29;p=deliverable%2Flinux.git

hwmon: (lm87) 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/lm87.c b/drivers/hwmon/lm87.c
index ba1d83d48056..a5e295826aea 100644
--- a/drivers/hwmon/lm87.c
+++ b/drivers/hwmon/lm87.c
@@ -617,6 +617,10 @@ static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
 	err = kstrtoul(buf, 10, &val);
 	if (err)
 		return err;
+
+	if (val > 255)
+		return -EINVAL;
+
 	data->vrm = val;
 	return count;
 }