OHCI_SIDSIZE
if (plen < 4 || plen > OHCI_SIDSIZE) {
buf = (uint32_t *)malloc(OHCI_SIDSIZE, M_FW, M_NOWAIT);
sc->sid_buf = fwdma_alloc_setup(sc->fc.dev, sc->fc.dmat, OHCI_SIDSIZE,
&sc->sid_dma, OHCI_SIDSIZE, BUS_DMA_NOWAIT);