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hwmon: (it87) Invalidate cache on temperature sensor change

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When any temperature sensor type is changed, the corresponding
temperature value needs to be updated. The register caching mechanism
may delay this update, so we want to invalidate the cache to force an
immediate update.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare 2010-04-14 16:14:10 +02:00
parent 8acf07c5a7
commit 2b3d1d87ea
1 changed files with 1 additions and 0 deletions
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drivers/hwmon/it87.c
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@ -563,6 +563,7 @@ static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
mutex_lock(&data->update_lock);
data->sensor = reg;
it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
data->valid = 0; /* Force cache refresh */
mutex_unlock(&data->update_lock);
return count;
}