hwmon: (sht15) Fix integer overflow in humidity calculation

[pandora-kernel.git] / drivers / hwmon / sht15.c

diff --git a/drivers/hwmon/sht15.c b/drivers/hwmon/sht15.c
index 3ba7dd8..1a9c32d 100644 (file)
--- a/drivers/hwmon/sht15.c
+++ b/drivers/hwmon/sht15.c
@@ -333,11 +333,11 @@ static inline int sht15_calc_humid(struct sht15_data *data)
 
        const int c1 = -4;
        const int c2 = 40500; /* x 10 ^ -6 */
-       const int c3 = -2800; /* x10 ^ -9 */
+       const int c3 = -28; /* x 10 ^ -7 */
 
        RHlinear = c1*1000
                + c2 * data->val_humid/1000
-               + (data->val_humid * data->val_humid * c3)/1000000;
+               + (data->val_humid * data->val_humid * c3) / 10000;
        return (temp - 25000) * (10000 + 80 * data->val_humid)
                / 1000000 + RHlinear;
 }