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authorGuenter Roeck <linux@roeck-us.net>2014-07-16 17:40:31 -0700
committerGuenter Roeck <linux@roeck-us.net>2014-07-16 21:18:47 -0700
commitde12d6f4b10b21854441f5242dcb29ea96181e58 (patch)
treebd197e8e568310bb71c6469f7d9242ed8b056df1 /drivers/hwmon/adt7470.c
parent6b00f440dd678d786389a7100a2e03fe44478431 (diff)
hwmon: (adt7470) Fix writes to temperature limit registers
Temperature limit registers are signed. Limits therefore need to be clamped to (-128, 127) degrees C and not to (0, 255) degrees C. Without this fix, writing a limit of 128 degrees C sets the actual limit to -128 degrees C. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: stable@vger.kernel.org Reviewed-by: Axel Lin <axel.lin@ingics.com>
Diffstat (limited to 'drivers/hwmon/adt7470.c')
-rw-r--r--drivers/hwmon/adt7470.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/hwmon/adt7470.c b/drivers/hwmon/adt7470.c
index 0f4dea5ccf17..9ee3913850d6 100644
--- a/drivers/hwmon/adt7470.c
+++ b/drivers/hwmon/adt7470.c
@@ -515,7 +515,7 @@ static ssize_t set_temp_min(struct device *dev,
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000);
- temp = clamp_val(temp, 0, 255);
+ temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->temp_min[attr->index] = temp;
@@ -549,7 +549,7 @@ static ssize_t set_temp_max(struct device *dev,
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000);
- temp = clamp_val(temp, 0, 255);
+ temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->temp_max[attr->index] = temp;
@@ -826,7 +826,7 @@ static ssize_t set_pwm_tmin(struct device *dev,
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000);
- temp = clamp_val(temp, 0, 255);
+ temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->pwm_tmin[attr->index] = temp;