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authorGuenter Roeck <linux@roeck-us.net>2014-06-30 18:34:30 +0400
committerGuenter Roeck <linux@roeck-us.net>2014-08-04 18:01:36 +0400
commit40ebdb9274ba71b6211f500904a3935af81a00ca (patch)
tree691716146bcd83a2e1c1b29e020231f878fc99ac /drivers/hwmon/w83791d.c
parent7560dc0a6d45dbf0d32eb56172dd5062753a8dcc (diff)
downloadlinux-40ebdb9274ba71b6211f500904a3935af81a00ca.tar.xz
hwmon: (w83791d) Fix smatch warning
smatch complains as follows when checking w83791d.c. drivers/hwmon/w83791d.c:996 store_temp23() warn: '32768' 32768 can't fit into 32767 'data->temp_add[nr][index]' Fix by using DIV_ROUND_CLOSEST and clamp_val to convert the values. While we are at it, modify other macros as well for consistency and to make the code easier to understand. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/w83791d.c')
-rw-r--r--drivers/hwmon/w83791d.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/hwmon/w83791d.c b/drivers/hwmon/w83791d.c
index bdcf2dce5ec4..cb3765fec98c 100644
--- a/drivers/hwmon/w83791d.c
+++ b/drivers/hwmon/w83791d.c
@@ -249,19 +249,16 @@ static u8 fan_to_reg(long rpm, int div)
* 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)