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 Kernel Packages, which is subscribed to linux-nvidia-6.14 in Ubuntu. https://bugs.launchpad.net/bugs/2121415 Title: Backport: iommu/arm-smmu-v3: Fix smmu_domain->nr_ats_masters decrement Status in linux-nvidia-6.14 package in Ubuntu: New Bug description: 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-nvidia-6.14/+bug/2121415/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
