hwmon: (asb100) 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>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/hwmon/asb100.c b/drivers/hwmon/asb100.c
index f96063680e58..272fcc837ecc 100644
--- a/drivers/hwmon/asb100.c
+++ b/drivers/hwmon/asb100.c
@@ -510,6 +510,10 @@ 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;
 }