nvkm_chid_unref
nvkm_chid_unref(&fifo->cgid);
nvkm_chid_unref(&fifo->chid);
nvkm_chid_unref(pchid);
void nvkm_chid_unref(struct nvkm_chid **);
nvkm_chid_unref(&runl->chid);
nvkm_chid_unref(&runl->cgid);