+/* move the slave if it belongs to the master; return 1 if match */
+static int check_matching_master_slave(struct snd_timer_instance *master,
+ struct snd_timer_instance *slave)
+{
+ if (slave->slave_class != master->slave_class ||
+ slave->slave_id != master->slave_id)
+ return 0;
+ if (master->timer->num_instances >= master->timer->max_instances)
+ return -EBUSY;
+ list_move_tail(&slave->open_list, &master->slave_list_head);
+ master->timer->num_instances++;
+ spin_lock_irq(&slave_active_lock);
+ spin_lock(&master->timer->lock);
+ slave->master = master;
+ slave->timer = master->timer;
+ if (slave->flags & SNDRV_TIMER_IFLG_RUNNING)
+ list_add_tail(&slave->active_list, &master->slave_active_head);
+ spin_unlock(&master->timer->lock);
+ spin_unlock_irq(&slave_active_lock);
+ return 1;
+}
+