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From 4e6907cae5feafc672ab00bab42fbf05e646496a Mon Sep 17 00:00:00 2001
From: Gary R Hook <gary.hook@amd.com>
Date: Fri, 3 Nov 2017 10:50:34 -0600
Subject: [PATCH 098/331] iommu/amd: Limit the IOVA page range to the specified
addresses
[ 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>
Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com>
---
drivers/iommu/amd_iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 1a0b110..0c910a8 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -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);
}
--
2.7.4
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