Files
linux/drivers
Qinxin Xia be5a2d3f8f iommu/arm-smmu-v3: Fix incorrect return in arm_smmu_attach_dev
After commit 48e7b8e284 ("iommu/arm-smmu-v3: Remove
arm_smmu_domain_finalise() during attach"), an error code is not
returned on the attach path when the smmu does not match with the
domain. This causes problems with VFIO because
vfio_iommu_type1_attach_group() relies on this check to determine domain
compatability.

Re-instate the -EINVAL return value when the SMMU doesn't match on the
device attach path.

Fixes: 48e7b8e284 ("iommu/arm-smmu-v3: Remove arm_smmu_domain_finalise() during attach")
Signed-off-by: Qinxin Xia <xiaqinxin@huawei.com>
Link: https://lore.kernel.org/r/20250422112951.2027969-1-xiaqinxin@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
2025-05-06 13:45:49 +01:00
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