Re: Ordering between PCI config space writes and MMIO reads?

Roland Dreier
2006-10-31T19:53:11Z

> Here's what I don't understand: according to PCI rules, pci config read
> can bypass pci config write (both are non-posted).
> So why does doing it help flush the writes as the comment claims?

No, I don't believe a read of a config register can pass a write of
the same register. (Someone correct me if I'm wrong)

- R.