+ pthread_mutex_unlock(&pawd->mutex);
+ if (ret != 0)
+ goto min_delay;
+ /*
+ * Even though the node status is zero, we might have data available,
+ * but the output buffer is full. If we don't set a timeout here, we
+ * are woken up only if new data arrives, which might be too late and
+ * result in a buffer underrun in the playing thread. To avoid this we
+ * never sleep longer than the (default) buffer time.
+ */
+timeout:
+ return sched_request_timeout_ms(20, s);
+min_delay: