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

Roland Dreier
2006-10-25T14:11:10Z

> I'm looking at arch/ia64/pci/pci.c.
> Wouldn't it be reasonable to include memory barriers around calls
> to SAL config space access functions?

It's reasonable, but is there a memory barrier strong enough to
guarantee that a config write has actually completed?

- R.