[openib-general] Ordering between PCI config space writes and MMIO reads?

[Roland Dreier]

 > I'll check if there is any additional reordering that can occur AFTER the
 > PIO_WRITE_COUNT goes to zero.  If so, it would be at bus level - not in
 > shub or routers.

Unfortunately, at least in theory, the reordering can occur.  For
example a bridge on some card plugged into an SN slot is allowed to
reorder things too.

 - R.