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| author | Guenter Roeck <linux@roeck-us.net> | 2014-06-30 07:34:30 -0700 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2014-08-04 07:01:36 -0700 |
| commit | 40ebdb9274ba71b6211f500904a3935af81a00ca (patch) | |
| tree | 691716146bcd83a2e1c1b29e020231f878fc99ac /drivers | |
| parent | 7560dc0a6d45dbf0d32eb56172dd5062753a8dcc (diff) | |
| download | lwn-40ebdb9274ba71b6211f500904a3935af81a00ca.tar.gz lwn-40ebdb9274ba71b6211f500904a3935af81a00ca.zip | |
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')
| -rw-r--r-- | drivers/hwmon/w83791d.c | 15 |
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) |