From: Gary R Hook Date: Fri, 3 Nov 2017 16:50:34 +0000 (-0600) Subject: iommu/amd: Limit the IOVA page range to the specified addresses X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=b92b4fb5c14257c0e7eae291ecc1f7b1962e1699;p=openwrt%2Fstaging%2Fblogic.git iommu/amd: Limit the IOVA page range to the specified addresses 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 Fixes: 8d54d6c8b8f3 ('iommu/amd: Implement apply_dm_region call-back') Signed-off-by: Alex Williamson --- diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 797e6454afd5..a8c111e96cc3 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -3151,7 +3151,7 @@ static void amd_iommu_apply_resv_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); }