iommu/vt-d: debugfs: Remove device_domain_lock usage

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The domain_translation_struct debugfs node is used to dump the DMAR page
tables for the PCI devices. It potentially races with setting domains to
devices. The existing code uses the global spinlock device_domain_lock to
avoid the races.

This removes the use of device_domain_lock outside of iommu.c by replacing
it with the group mutex lock. Using the group mutex lock is cleaner and
more compatible to following cleanups.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20220706025524.2904370-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Lu Baolu 2022-07-12 08:08:52 +08:00 • committed by Joerg Roedel

parent 9f18abab60

commit 983ebe57b3

3 changed files with 32 additions and 14 deletions

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43

drivers/iommu/intel/debugfs.c

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2

drivers/iommu/intel/iommu.c

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1

drivers/iommu/intel/iommu.h

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