* Use an alias so that the callback is called with an absolute address,
* rather than an offset relative to to start + off_low.
*/
- memory_region_init_io(&mrpio->mr, &portio_ops, mrpio, piolist->name,
+ memory_region_init_io(&mrpio->mr, NULL, &portio_ops, mrpio, piolist->name,
off_high - off_low);
memory_region_add_subregion(piolist->address_space,
start + off_low, &mrpio->mr);