--- zzzz-none-000/linux-3.10.107/drivers/hwmon/w83791d.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/hwmon/w83791d.c	2021-02-04 17:41:59.000000000 +0000
@@ -249,19 +249,16 @@
  * the bottom 7 bits will always be zero
  */
 #define TEMP23_FROM_REG(val)	((val) / 128 * 500)
-#define TEMP23_TO_REG(val)	((val) <= -128000 ? 0x8000 : \
-				 (val) >= 127500 ? 0x7F80 : \
-				 (val) < 0 ? ((val) - 250) / 500 * 128 : \
-				 ((val) + 250) / 500 * 128)
+#define TEMP23_TO_REG(val)	(DIV_ROUND_CLOSEST(clamp_val((val), -128000, \
+						   127500), 500) * 128)
 
 /* for thermal cruise target temp, 7-bits, LSB = 1 degree Celsius */
-#define TARGET_TEMP_TO_REG(val)		((val) < 0 ? 0 : \
-					(val) >= 127000 ? 127 : \
-					((val) + 500) / 1000)
+#define TARGET_TEMP_TO_REG(val)	DIV_ROUND_CLOSEST(clamp_val((val), 0, 127000), \
+						  1000)
 
 /* for thermal cruise temp tolerance, 4-bits, LSB = 1 degree Celsius */
-#define TOL_TEMP_TO_REG(val)		((val) >= 15000 ? 15 : \
-					((val) + 500) / 1000)
+#define TOL_TEMP_TO_REG(val)	DIV_ROUND_CLOSEST(clamp_val((val), 0, 15000), \
+						  1000)
 
 #define BEEP_MASK_TO_REG(val)		((val) & 0xffffff)
 #define BEEP_MASK_FROM_REG(val)		((val) & 0xffffff)
@@ -1043,7 +1040,7 @@
 	SENSOR_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13),
 };
 
-/* get reatime status of all sensors items: voltage, temp, fan */
+/* get realtime status of all sensors items: voltage, temp, fan */
 static ssize_t show_alarms_reg(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
@@ -1184,6 +1181,9 @@
 	if (err)
 		return err;
 
+	if (val > 255)
+		return -EINVAL;
+
 	data->vrm = val;
 	return count;
 }