On Sun, 14 Apr 2013 10:56:11 -0700, Guenter Roeck wrote:
> Cached data is no longer valid after resetting the temperature history.
>
> Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> ---
> drivers/hwmon/tmp401.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
> index a92746f..2f581a5 100644
> --- a/drivers/hwmon/tmp401.c
> +++ b/drivers/hwmon/tmp401.c
> @@ -353,6 +353,8 @@ 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))
> @@ -364,8 +366,10 @@ 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;
> }
Acked-by: Jean Delvare <khali@xxxxxxxxxxxx>
--
Jean Delvare
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