From: "monk.liu" <monk.liu@xxxxxxx>
This patch has been added to the 3.18 stable tree. If you have any
objections, please let us know.
===============
[ Upstream commit db12973cd581d4e79f4aadd0960948f268d15af7 ]
Fixing a memory leak with userptrs.
v2: clean up the loop, use an iterator instead
v3: remove unused variable
Signed-off-by: monk.liu <monk.liu@xxxxxxx>
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
CC: stable@xxxxxxxxxxxxxxx
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_ttm.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 9ab8e26..13f6947 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -568,8 +568,7 @@ static void radeon_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
{
struct radeon_device *rdev = radeon_get_rdev(ttm->bdev);
struct radeon_ttm_tt *gtt = (void *)ttm;
- struct scatterlist *sg;
- int i;
+ struct sg_page_iter sg_iter;
int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
enum dma_data_direction direction = write ?
@@ -582,9 +581,8 @@ static void radeon_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
/* free the sg table and pages again */
dma_unmap_sg(rdev->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 & RADEON_GEM_USERPTR_READONLY))
set_page_dirty(page);
--
2.1.0
--
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