diff options
| author | Jean Delvare <khali@linux-fr.org> | 2011-10-20 03:06:45 -0400 |
|---|---|---|
| committer | Guenter Roeck <guenter.roeck@ericsson.com> | 2011-10-20 07:17:08 -0700 |
| commit | 133d324d82e144588939ad25b732b5b6c33b03d9 (patch) | |
| tree | 752cba707cf1ea3914a1da31ac4caa8152aa8eeb /drivers | |
| parent | 899e3ee404961a90b828ad527573aaaac39f0ab1 (diff) | |
| download | lwn-133d324d82e144588939ad25b732b5b6c33b03d9.tar.gz lwn-133d324d82e144588939ad25b732b5b6c33b03d9.zip | |
hwmon: (w83627ehf) Fix negative 8-bit temperature values
Since 8-bit temperature values are now handled in 16-bit struct
members, values have to be cast to s8 for negative temperatures to be
properly handled. This is broken since kernel version 2.6.39
(commit bce26c58df86599c9570cee83eac58bdaae760e4.)
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: stable@kernel.org # 2.6.39+
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/w83627ehf.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c index 7b0260dc76fb..36d7f270b14d 100644 --- a/drivers/hwmon/w83627ehf.c +++ b/drivers/hwmon/w83627ehf.c @@ -390,7 +390,7 @@ temp_from_reg(u16 reg, s16 regval) { if (is_word_sized(reg)) return LM75_TEMP_FROM_REG(regval); - return regval * 1000; + return ((s8)regval) * 1000; } static inline u16 @@ -398,7 +398,8 @@ temp_to_reg(u16 reg, long temp) { if (is_word_sized(reg)) return LM75_TEMP_TO_REG(temp); - return DIV_ROUND_CLOSEST(SENSORS_LIMIT(temp, -127000, 128000), 1000); + return (s8)DIV_ROUND_CLOSEST(SENSORS_LIMIT(temp, -127000, 128000), + 1000); } /* Some of analog inputs have internal scaling (2x), 8mV is ADC LSB */ |