iommu/amd: Split irq_lookup_table out of the amd_iommu_devtable_lock

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The function get_irq_table() reads/writes irq_lookup_table while holding
the amd_iommu_devtable_lock. It also modifies
amd_iommu_dev_table[].data[2].
set_dte_entry() is using amd_iommu_dev_table[].data[0|1] (under the
domain->lock) so it should be okay. The access to the iommu is
serialized with its own (iommu's) lock.

So split out get_irq_table() out of amd_iommu_devtable_lock's lock.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Sebastian Andrzej Siewior 2018-03-22 16:22:36 +01:00 • committed by Joerg Roedel

parent 2bc0018089

commit ea6166f4b8

1 changed files with 3 additions and 2 deletions

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drivers/iommu/amd_iommu.c

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