iommu/vt-d: Remove unnecessary rcu_read_locks

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We use RCU's for rarely updated lists like iommus, rmrr, atsr units.

I'm not sure why domain_remove_dev_info() in domain_exit() was surrounded
by rcu_read_lock. Lock was present before refactoring in d160aca527,
but it was related to rcu list, not domain_remove_dev_info function.

dmar_remove_one_dev_info() doesn't touch any of those lists, so it doesn't
require a lock. In fact it is called 6 times without it anyway.

Fixes: d160aca527 ("iommu/vt-d: Unify domain->iommu attach/detachment")

Signed-off-by: Lukasz Odzioba <lukasz.odzioba@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Lukasz Odzioba 2019-05-20 15:41:28 +02:00 • committed by Joerg Roedel

parent d7af4d987d

commit f780a8dc19

1 changed files with 0 additions and 4 deletions

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drivers/iommu/intel-iommu.c

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