intel_engine_set_heartbeat
int intel_engine_set_heartbeat(struct intel_engine_cs *engine,
intel_engine_set_heartbeat(engine,
err = intel_engine_set_heartbeat(engine, 0);
intel_engine_set_heartbeat(engine, 1);
intel_engine_set_heartbeat(engine,
err = intel_engine_set_heartbeat(engine, delay);
intel_engine_set_heartbeat(engine, old_beat);
ret = intel_engine_set_heartbeat(engine, BEAT_INTERVAL);