4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: Guenter Roeck <[email protected]> commit 82dbe987b70042b340f851bdc969a971081e5f02 upstream. If sensor attributes were never read, the pwm control data has not been initiialized, which can cause wrong driver behavior. Ensure that cached data is current before acting on it. Reported-by: Kevin Folz <[email protected]> Signed-off-by: Guenter Roeck <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/hwmon/it87.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/hwmon/it87.c +++ b/drivers/hwmon/it87.c @@ -1354,6 +1354,7 @@ static ssize_t set_pwm(struct device *de return -EINVAL; mutex_lock(&data->update_lock); + it87_update_pwm_ctrl(data, nr); if (has_newer_autopwm(data)) { /* * If we are in automatic mode, the PWM duty cycle register @@ -1466,6 +1467,7 @@ static ssize_t set_pwm_temp_map(struct d } mutex_lock(&data->update_lock); + it87_update_pwm_ctrl(data, nr); data->pwm_temp_map[nr] = reg; /* * If we are in automatic mode, write the temp mapping immediately;
