Comment # 5 on bug 1208938 from Jiri Slaby

commit 79218fd0b38bb05e8dcb80a49342836274046432
Author: Nicolin Chen <nicolinc@nvidia.com>
Date:   Mon Oct 17 16:00:45 2022 -0700

    iommu/amd: Drop unnecessary checks in amd_iommu_attach_device()

looks suspicious wrt this bug. Joerg?