iommu/io-pgtable-arm: Rationalise size check

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It makes little sense to only validate the requested size after we think
we've found a matching block size - making the check up-front is simple,
and far more logical than waiting to walk off the bottom of the table to
infer that we must have been passed a bogus size to start with.

We're missing an equivalent check on the unmap path, so add that as well
for consistency.

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

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Robin Murphy 2019-10-25 19:08:31 +01:00 • committed by Will Deacon

parent b5813c164e

commit f7b90d2c74

1 changed files with 9 additions and 1 deletions

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drivers/iommu/io-pgtable-arm.c

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