hwmon: (w83791d) 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/w83791d.c b/drivers/hwmon/w83791d.c
index cb3765fec98c079e121472830bd576e37e17fab9..001df856913feba93790bf9383b2023115defad3 100644 (file)
--- a/drivers/hwmon/w83791d.c
+++ b/drivers/hwmon/w83791d.c
@@ -1181,6 +1181,9 @@ static ssize_t store_vrm_reg(struct device *dev,
        if (err)
                return err;
 
+       if (val > 255)
+               return -EINVAL;
+
        data->vrm = val;
        return count;
 }