> 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