PIOD_READ_D
piod.piod_op = PIOD_READ_D;
case PIOD_READ_D:
iorequest.piod_op = PIOD_READ_D;
piod.piod_op = PIOD_READ_D;
iorequest.piod_op = PIOD_READ_D;
iorequest.piod_op = PIOD_READ_D;