iommu/arm-smmu-v3: Warn about missing IRQs

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It is annoyingly non-obvious when DMA transactions silently go missing
due to undetected SMMU faults. Help skip the first few debugging steps
in those situations by making it clear when we have neither wired IRQs
nor MSIs with which to raise error conditions.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Robin Murphy 2017-10-30 12:14:02 +00:00 • committed by Will Deacon

parent 4a3928c6f8

commit 4c8996d7d7

1 changed files with 6 additions and 0 deletions

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drivers/iommu/arm-smmu-v3.c

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