Public bug reported: This upstream (v6.17-rc3) fix addresses an issue where the ats master tracking can become corrupted during a SMMU attachment when the state changes. This can lead to odd side effects as the count does not represent the actual state of the hardware. Backport fix to 6.14-HWE.
Lore discussion: https://lore.kernel.org/r/[email protected] Upstream SHA: 685ca577b408 iommu/arm-smmu-v3: Fix smmu_domain->nr_ats_masters decrement Tested with host and guest kernels using GPU passthrough. This commit picked cleanly to 24.04_linux-nvidia-6.14-next. ** Affects: linux-nvidia-6.14 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2121415 Title: Backport: iommu/arm-smmu-v3: Fix smmu_domain->nr_ats_masters decrement To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-nvidia-6.14/+bug/2121415/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
