Hello! > I don't disagree; that does sound like it could be useful. I just > don't know the best way to accomplish it. Seems like you'd have to do > something in resource_show() to re-read the BAR and validate the > cache. I don't know what you do if you find that it's invalid. I also do not see how to do it in a reasonably simple way. I checked lspci and it turned out that it already add a "[virtual]" marker in cases when the BAR is zero (which was this case -- am I right?) and the kernel reports a non-zero address. However, it turned out that the check is never triggered on I/O regions, because the BAR contains a non-zero type bit. I have modified the check to take into account just the address part of the BAR. You can check it in the master branch. Martin
