iommu: Consolidate the code to calculate the target default domain type

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Put all the code to calculate the default domain type into one
function. Make the function able to handle the
iommu_change_dev_def_domain() by taking in the target domain type and
erroring out if the target type isn't reachable.

This makes it really clear that specifying a 0 type during
iommu_change_dev_def_domain() will have the same outcome as the normal
probe path.

Remove the obfuscating use of __iommu_group_for_each_dev() and related
struct __group_domain_type.

Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/12-v5-1b99ae392328+44574-iommu_err_unwind_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Jason Gunthorpe 2023-05-11 01:42:10 -03:00 • committed by Joerg Roedel

parent dfddd54dc7

commit 8b4eb75ee5

1 changed files with 35 additions and 53 deletions

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drivers/iommu/iommu.c

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