sym_xpt_async_transfer_neg
sym_xpt_async_transfer_neg(np, cp->target, SYM_SPI_VALID_WDTR);
sym_xpt_async_transfer_neg(np, cp->target, SYM_SPI_VALID_SDTR);
sym_xpt_async_transfer_neg(np, cp->target, SYM_SPI_VALID_PPR);