Since I can’t reply to the “Kernel 6.11 has broken my Iommu groups” thread due to only being allowed to post 3 times in a thread as a new user, I’m creating this thread so anyone who looks up the issue is aware that it’s been fixed.
Jason Gunthorpe submitted a patch that was accepted, it should be in 6.12:
https:// lore dot kernel dot org/all/20241029163727.GA1162043@bhelgaas/
https:// git dot kernel dot org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f3c3ccc4fe49dbc560b01d16bebd1b116c46c2b4