[PATCH] drm/radeon: fix userptr BO unpin bug v2

[Alex Deucher]

On Tue, May 5, 2015 at 3:24 AM, Christian König <deathsimple at vodafone.de> wrote:
> From: "monk.liu" <monk.liu at amd.com>
>
> Fixing a memory leak with userptrs.
>
> v2: clean up the loop, use an iterator instead
>
> Signed-off-by: monk.liu <monk.liu at amd.com>
> Signed-off-by: Christian König <christian.koenig at amd.com>
> CC: stable at vger.kernel.org

Applied to my -fixes tree.

Alex


> ---
>  drivers/gpu/drm/radeon/radeon_ttm.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
> index b292aca..921dd0f 100644
> --- a/drivers/gpu/drm/radeon/radeon_ttm.c
> +++ b/drivers/gpu/drm/radeon/radeon_ttm.c
> @@ -591,7 +591,7 @@ 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;
> +       struct sg_page_iter sg_iter;
>         int i;
>
>         int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
> @@ -605,9 +605,8 @@ 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);
>
> --
> 1.9.1
>