From: Gary R Hook <gary.hook@amd.com>
Date: Fri, 3 Nov 2017 10:50:34 -0600
Subject: iommu/amd: Limit the IOVA page range to the specified addresses
Git-commit: b92b4fb5c14257c0e7eae291ecc1f7b1962e1699
Patch-mainline: v4.15-rc1
References: bsc#975772
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>
Acked-by: Joerg Roedel <jroedel@suse.de>
---
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
@@ -3355,7 +3355,7 @@ static void amd_iommu_apply_resv_region(
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);
}