UTOPPY_BSIZE
sc->sc_out_data = kmem_alloc(UTOPPY_BSIZE + 1, KM_SLEEP);
sc->sc_in_data = kmem_alloc(UTOPPY_BSIZE + 1, KM_SLEEP);
kmem_free(sc->sc_out_data, UTOPPY_BSIZE + 1);
kmem_free(sc->sc_in_data, UTOPPY_BSIZE + 1);
len = uimin(len, UTOPPY_BSIZE - (UTOPPY_HEADER_SIZE +
if (len >= UTOPPY_BSIZE) {
bytesleft = UTOPPY_BSIZE;