FWPRI
selwakeuppri(&xferq->rsel, FWPRI);
err = msleep(&d->rq, FW_GMTX(d->fc), FWPRI, "fwra", 0);
err = msleep(ir, FW_GMTX(fc), FWPRI, "fw_read", hz);
err = msleep(it, FW_GMTX(fc), FWPRI, "fw_write", hz);