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authorGuenter Roeck <linux@roeck-us.net>2013-04-14 04:39:46 -0700
committerGuenter Roeck <linux@roeck-us.net>2013-04-21 08:27:28 -0700
commit8eb6d90fec24244f80bba018d955413ea6117a34 (patch)
tree3e6445966e8913bf43406feaf8a8efa5e4e9edbe /drivers/hwmon
parent14f2a6654dd42d60645071de26d17d0bced63a7d (diff)
downloadlinux-8eb6d90fec24244f80bba018d955413ea6117a34.tar.gz
hwmon: (tmp401) Reset valid flag when resetting temperature history
Cached data is no longer valid after resetting the temperature history. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/tmp401.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
index 4d306b29ba7..061146288e4 100644
--- a/drivers/hwmon/tmp401.c
+++ b/drivers/hwmon/tmp401.c
@@ -351,6 +351,8 @@ static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute
static ssize_t reset_temp_history(struct device *dev,
struct device_attribute *devattr, const char *buf, size_t count)
{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct tmp401_data *data = i2c_get_clientdata(client);
long val;
if (kstrtol(buf, 10, &val))
@@ -362,8 +364,10 @@ static ssize_t reset_temp_history(struct device *dev,
val);
return -EINVAL;
}
- i2c_smbus_write_byte_data(to_i2c_client(dev),
- TMP401_TEMP_MSB_WRITE[5][0], val);
+ mutex_lock(&data->update_lock);
+ i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
+ data->valid = 0;
+ mutex_unlock(&data->update_lock);
return count;
}