On Wed, Feb 23, 2022 at 06:00:06PM +0000, Robin Murphy wrote: > ...and equivalently just set owner_cnt directly to 0 here. I don't see a > realistic use-case for any driver to claim the same group more than once, > and allowing it in the API just feels like opening up various potential > corners for things to get out of sync. I am Ok if we toss it out to get this merged, as there is no in-kernel user right now. Something will have to come back for iommufd, but we can look at what is best suited then. Thanks, Jason