linux-kernel - [PATCH 4.14 29/52] drm/amdgpu: fix offset calculation in amdgpu_vm_bo_clear

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Message-Id: <20210405085022.937617437@linuxfoundation.org>
Date:   Mon,  5 Apr 2021 10:53:55 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Nirmoy Das <nirmoy.das@....com>,
        Christian König <christian.koenig@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 4.14 29/52] drm/amdgpu: fix offset calculation in amdgpu_vm_bo_clear_mappings()

From: Nirmoy Das <nirmoy.das@....com>

commit 5e61b84f9d3ddfba73091f9fbc940caae1c9eb22 upstream.

Offset calculation wasn't correct as start addresses are in pfn
not in bytes.

CC: stable@...r.kernel.org
Signed-off-by: Nirmoy Das <nirmoy.das@....com>
Reviewed-by: Christian König <christian.koenig@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2285,7 +2285,7 @@ int amdgpu_vm_bo_clear_mappings(struct a
 			after->start = eaddr + 1;
 			after->last = tmp->last;
 			after->offset = tmp->offset;
-			after->offset += after->start - tmp->start;
+			after->offset += (after->start - tmp->start) << PAGE_SHIFT;
 			after->flags = tmp->flags;
 			list_add(&after->list, &tmp->list);
 		}