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iommu/amd: Limit the IOVA page range to the specified addresses

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[ Upstream commit b92b4fb5c1 ]

The extent of pages specified when applying a reserved region should
include up to the last page of the range, but not the page following
the range.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Fixes: 8d54d6c8b8 ('iommu/amd: Implement apply_dm_region call-back')
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gary R Hook
2017-11-03 10:50:34 -06:00
committed by Greg Kroah-Hartman
parent cb0acb3701
commit 03bfadfb0d
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/amd_iommu.c
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@@ -3211,7 +3211,7 @@ static void amd_iommu_apply_dm_region(struct device *dev,
unsigned long start, end;
start = IOVA_PFN(region->start);
end = IOVA_PFN(region->start + region->length);
end = IOVA_PFN(region->start + region->length - 1);
WARN_ON_ONCE(reserve_iova(&dma_dom->iovad, start, end) == NULL);
}