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iommu: io-pgtable-arm: Improve coverage of arm_lpae_range_has_mapping

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The arm_lpae_range_has_mapping currently checks if there are any
non-mapped slots in a given iova range, but it's really meant to check
if there is *any* mapping whatsoever in a given iova range.  Fix this.

Change-Id: I90e426ab157cc194328b754ac5021051ac883603
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
This commit is contained in:
Mitchel Humpherys 2015-06-01 16:12:26 -07:00 • committed by David Keitel
parent 3671f9ec4a
commit e7f0469ba0
1 changed files with 4 additions and 4 deletions
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8
drivers/iommu/io-pgtable-arm.c
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@ -954,7 +954,7 @@ static void __init arm_lpae_dump_ops(struct io_pgtable_ops *ops)
}) })
/* /*
* Returns true if the entire iova range has any mapping in ops. * Returns true if there's any mapping in the given iova range in ops.
*/ */
static bool arm_lpae_range_has_mapping(struct io_pgtable_ops *ops, static bool arm_lpae_range_has_mapping(struct io_pgtable_ops *ops,
unsigned long iova_start, size_t size) unsigned long iova_start, size_t size)
@ -962,11 +962,11 @@ static bool arm_lpae_range_has_mapping(struct io_pgtable_ops *ops,
unsigned long iova = iova_start; unsigned long iova = iova_start;
while (iova < (iova_start + size)) { while (iova < (iova_start + size)) {
if (!ops->iova_to_phys(ops, iova + 42)) if (ops->iova_to_phys(ops, iova + 42))
return false; return true;
iova += SZ_4K; iova += SZ_4K;
} }
return true; return false;
} }
/* /*