VQ_RING_DESC_CHAIN_END
VQ_RING_DESC_CHAIN_END, "full ring terminated " \
indirect[i].next = VQ_RING_DESC_CHAIN_END;
vr->desc[i].next = VQ_RING_DESC_CHAIN_END;
VQASSERT(vq, idx != VQ_RING_DESC_CHAIN_END,