1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/hwmon/g762.c b/drivers/hwmon/g762.c
index b96a2a9e4df7..628be9c95ff9 100644
--- a/drivers/hwmon/g762.c
+++ b/drivers/hwmon/g762.c
@@ -193,14 +193,17 @@ static inline unsigned int rpm_from_cnt(u8 cnt, u32 clk_freq, u16 p,
  * Convert fan RPM value from sysfs into count value for fan controller
  * register (FAN_SET_CNT).
  */
-static inline unsigned char cnt_from_rpm(u32 rpm, u32 clk_freq, u16 p,
+static inline unsigned char cnt_from_rpm(unsigned long rpm, u32 clk_freq, u16 p,
                                          u8 clk_div, u8 gear_mult)
 {
-        if (!rpm)         /* to stop the fan, set cnt to 255 */
+        unsigned long f1 = clk_freq * 30 * gear_mult;
+        unsigned long f2 = p * clk_div;
+
+        if (!rpm)       /* to stop the fan, set cnt to 255 */
                 return 0xff;
 
-        return clamp_val(((clk_freq * 30 * gear_mult) / (rpm * p * clk_div)),
-                         0, 255);
+        rpm = clamp_val(rpm, f1 / (255 * f2), ULONG_MAX / f2);
+        return DIV_ROUND_CLOSEST(f1, rpm * f2);
 }
 
 /* helper to grab and cache data, at most one time per second */