Your understanding is correct.  I think this is a bug.

Do you actually see the bug happening?  So far it has never hit me, but 
maybe due to the drivers that are loaded on my configuration.

Jun

No, I don't actually see it.  It's not a big window, and pci config
cycles don't occur very often.  I found it while learning the device.

I checked the ddb5476 and ddb5074 dirctories, and it looks like they
have the same problem.

It's a shame that the devices have only two windows into pci space when
having three windows would be much simpler...

Thanks for the response.

Gerald