SMU_CMDSZ
if (bus_dmamem_alloc(sc->sc_dmat, SMU_CMDSZ, 0, 0,
SMU_CMDSZ, &sc->sc_cmd, BUS_DMA_NOWAIT)) {
if (bus_dmamap_create(sc->sc_dmat, SMU_CMDSZ, 1, SMU_CMDSZ, 0,
bus_dmamem_unmap(sc->sc_dmat, sc->sc_cmd, SMU_CMDSZ);
SMU_CMDSZ, NULL, BUS_DMA_NOWAIT)) {
bus_dmamem_unmap(sc->sc_dmat, sc->sc_cmd, SMU_CMDSZ);