1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
From dd08fae1e9b2466380d9447a0643c182cd142149 Mon Sep 17 00:00:00 2001
From: "monk.liu" <monk.liu@amd.com>
Date: Thu, 7 May 2015 14:19:18 -0400
Subject: [PATCH 0189/1050] drm/amdgpu: fix userptr BO unpin bug (v2)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
sg could point to array of contigiouse page*, only free page could lead
to memory leak.
v2: use iterator
Signed-off-by: monk.liu <monk.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 120e6e7..729e0bb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -555,8 +555,7 @@ static void amdgpu_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
{
struct amdgpu_device *adev = amdgpu_get_adev(ttm->bdev);
struct amdgpu_ttm_tt *gtt = (void *)ttm;
- struct scatterlist *sg;
- int i;
+ struct sg_page_iter sg_iter;
int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
enum dma_data_direction direction = write ?
@@ -569,9 +568,8 @@ static void amdgpu_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
/* free the sg table and pages again */
dma_unmap_sg(adev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
- for_each_sg(ttm->sg->sgl, sg, ttm->sg->nents, i) {
- struct page *page = sg_page(sg);
-
+ for_each_sg_page(ttm->sg->sgl, &sg_iter, ttm->sg->nents, 0) {
+ struct page *page = sg_page_iter_page(&sg_iter);
if (!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY))
set_page_dirty(page);
--
1.9.1
|
