On Fri, Feb 02, 2024 at 10:40:36AM +0000, Jon Hunter wrote: > > But, what is the actual log output you see, is it -EEXIST? > > I see ... > > ERR KERN host1x drm: iommu configuration for device failed with -ENOENT So that shouldn't happen in you case as far as I can tell, the device is properly added, link->kobj should be fine and ENOENT shouldn't happen. > > If it is coming and going is it a race of some kind? > > It is consistent without the above. However, I did not think that the > above change would change the returning on -ENOENT? I will add more > debug. I do not think it can either Still wonder if there is some odd race.. Let me know when you figure out what is happening - I think there is some bug here it is not just a harmless warning. Jason