iommu/vt-d: Refactor device_to_iommu() helper

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It is refactored in two ways:

- Make it global so that it could be used in other files.

- Make bus/devfn optional so that callers could ignore these two returned
values when they only want to get the coresponding iommu pointer.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20200724014925.15523-9-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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This commit is contained in:

Lu Baolu 2020-07-24 09:49:21 +08:00 • committed by Joerg Roedel

parent d315e9e684

commit dd6692f1b8

3 changed files with 21 additions and 45 deletions

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55

drivers/iommu/intel/iommu.c

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8

drivers/iommu/intel/svm.c

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3

include/linux/intel-iommu.h

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