hwmon: (adt7470) Allow faster removal

adt7470_remove will wait for the update thread to complete before returning. This had a worst-case time of up to the user-configurable auto_update_interval. Replace msleep_interruptible with set_current_state and schedule_timeout so that kthread_stop will interrupt the sleep. Signed-off-by: Joshua Scott <joshua.scott@alliedtelesis.co.nz> Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Author: Joshua Scott

drivers/hwmon/adt7470.c

@@ -273,9 +273,12 @@ static int adt7470_update_thread(void *p)
 mutex_lock(&data->lock);
 adt7470_read_temperatures(client, data);
 mutex_unlock(&data->lock);
+
+set_current_state(TASK_INTERRUPTIBLE);
 if (kthread_should_stop())
 break;
-msleep_interruptible(data->auto_update_interval);
+
+schedule_timeout(msecs_to_jiffies(data->auto_update_interval));
 }
 
 complete_all(&data->auto_update_stop);