audio/usb_ac/usb_ac.c

4511 		if (engp->af_engp == NULL)
4577 	if (statep->usb_ac_audio_dev == NULL || engp->af_engp == NULL)
4580 	audio_dev_remove_engine(statep->usb_ac_audio_dev, engp->af_engp);
4581 	audio_engine_free(engp->af_engp);
4584 	engp->af_engp = NULL;
4598 	audio_engine_t *af_engp;
4637 	af_engp = audio_engine_alloc(&usb_engine_ops, engp->af_eflags);
4638 	if (af_engp == NULL) {
4644 	ASSERT(engp->af_engp == 0);
4647 	engp->af_engp = af_engp;
4650 	audio_engine_set_private(af_engp, engp);
4651 	audio_dev_add_engine(af_devp, af_engp);
5191 	if (statep->engines[0].af_engp) {
5205 	if (statep->engines[1].af_engp) {