4.9-stable review patch. If anyone has any objections, please let me know.
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From: Gary R Hook gary.hook@amd.com
[ Upstream commit b92b4fb5c14257c0e7eae291ecc1f7b1962e1699 ]
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: 8d54d6c8b8f3 ('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 --- drivers/iommu/amd_iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -3211,7 +3211,7 @@ static void amd_iommu_apply_dm_region(st 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); }