From: Joerg Roedel <joerg.roedel@amd.com>
Date: Tue, 11 Oct 2011 15:41:32 +0000 (+0200)
Subject: iommu/amd: Fix wrong shift direction
X-Git-Tag: firefly_0821_release~7541^2~2451
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9bdb666778b0eb502554288ac3188139c3c45f0e;p=firefly-linux-kernel-4.4.55.git

iommu/amd: Fix wrong shift direction

commit fcd0861db1cf4e6ed99f60a815b7b72c2ed36ea4 upstream.

The shift direction was wrong because the function takes a
page number and i is the address is the loop.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index d3d9d50d93a5..bfd75ff5d5bd 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1203,7 +1203,7 @@ static int alloc_new_range(struct dma_ops_domain *dma_dom,
 		if (!pte || !IOMMU_PTE_PRESENT(*pte))
 			continue;
 
-		dma_ops_reserve_addresses(dma_dom, i << PAGE_SHIFT, 1);
+		dma_ops_reserve_addresses(dma_dom, i >> PAGE_SHIFT, 1);
 	}
 
 	update_domain(&dma_dom->domain);