DCSR_BUSERRINTR
(dcsr & DCSR_BUSERRINTR) == 0) {
if ((dcsr & DCSR_BUSERRINTR) || dmac_continue_xfer(sc, dxs) == 0) {
(dcsr & DCSR_BUSERRINTR)) {
(dcsr & DCSR_BUSERRINTR) ? EFAULT : 0);