Nicolin Chen 685ca577b4 iommu/arm-smmu-v3: Fix smmu_domain->nr_ats_masters decrement ... The arm_smmu_attach_commit() updates master->ats_enabled before calling arm_smmu_remove_master_domain() that is supposed to clean up everything in the old domain, including the old domain's nr_ats_masters. So, it is supposed to use the old ats_enabled state of the device, not an updated state. This isn't a problem if switching between two domains where: - old ats_enabled = false; new ats_enabled = false - old ats_enabled = true; new ats_enabled = true but can fail cases where: - old ats_enabled = false; new ats_enabled = true (old domain should keep the counter but incorrectly decreased it) - old ats_enabled = true; new ats_enabled = false (old domain needed to decrease the counter but incorrectly missed it) Update master->ats_enabled after arm_smmu_remove_master_domain() to fix this. Fixes: 7497f4211f ("iommu/arm-smmu-v3: Make changing domains be hitless for ATS") Cc: stable@vger.kernel.org Signed-off-by: Nicolin Chen <nicolinc@nvidia.com> Acked-by: Will Deacon <will@kernel.org> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Pranjal Shrivastava <praan@google.com> Link: https://lore.kernel.org/r/20250801030127.2006979-1-nicolinc@nvidia.com Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>		2025-08-22 08:41:20 +02:00
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arm-smmu	Merge branch 'arm/smmu/updates' into next	2025-07-24 11:18:28 +01:00
arm-smmu-v3	iommu/arm-smmu-v3: Fix smmu_domain->nr_ats_masters decrement	2025-08-22 08:41:20 +02:00
Kconfig	iommu: Split out and tidy up Arm Kconfig	2025-04-17 16:34:00 +02:00
Makefile	Revert "iommu: make inclusion of arm/arm-smmu-v3 directory conditional"	2025-05-31 07:43:16 -07:00