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drm/amdgpu: fix userptr BO unpin bug (v2)

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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>
This commit is contained in:
monk.liu 2015-05-07 14:19:18 -04:00 committed by Alex Deucher
parent 886712881d
commit dd08fae1e9
1 changed files with 3 additions and 5 deletions
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8
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
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@ -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);