On 25/07/2019 02:09, Rob Herring wrote:
> If a driver does its own management of pages, the shmem helper object's
> pages array could be allocated when a SG table is not. There's not
> really any good reason to tie putting pages with having a SG table when
> freeing the object, so just put pages if the pages array is populated.
>
> Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
> Cc: Maxime Ripard <maxime.rip...@bootlin.com>
> Cc: Sean Paul <s...@poorly.run>
> Cc: David Airlie <airl...@linux.ie>
> Cc: Daniel Vetter <dan...@ffwll.ch>
> Cc: Eric Anholt <e...@anholt.net>
> Signed-off-by: Rob Herring <r...@kernel.org>
LGTM: Reviewed-by: Steven Price <steven.pr...@arm.com>
> ---
> v2:
> - new patch
>
> drivers/gpu/drm/drm_gem_shmem_helper.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c
> b/drivers/gpu/drm/drm_gem_shmem_helper.c
> index 2f64667ac805..477e4cc50f7a 100644
> --- a/drivers/gpu/drm/drm_gem_shmem_helper.c
> +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
> @@ -118,11 +118,11 @@ void drm_gem_shmem_free_object(struct drm_gem_object
> *obj)
> if (shmem->sgt) {
> dma_unmap_sg(obj->dev->dev, shmem->sgt->sgl,
> shmem->sgt->nents, DMA_BIDIRECTIONAL);
> -
> - drm_gem_shmem_put_pages(shmem);
> sg_free_table(shmem->sgt);
> kfree(shmem->sgt);
> }
> + if (shmem->pages)
> + drm_gem_shmem_put_pages(shmem);
> }
>
> WARN_ON(shmem->pages_use_count);
> --
> 2.20.1
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>
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