Re: [PATCH] drm/gem-dma: Correct GEM object wrapper documentation

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

On Sat, Sep 12, 2026 at 08:32:58AM +0200, Karl Mehltretter wrote:
> The drm_gem_dma_object_free() wrapper calls drm_gem_dma_free(), but its
> description still names the former drm_gem_dma_free_object() helper.
> Update the reference to match the wrapped function.
> 
> Also correct drm_gem_dma_object_get_sg_table() to document an error
> pointer on failure. It forwards the result of
> drm_gem_dma_get_sg_table(), which returns ERR_PTR() rather than NULL on
> failure.
> 
> Fixes: e580ea25c08d ("drm/cma-helper: Pass GEM CMA object in public interfaces")
> Fixes: 05b1de51df07 ("drm/cma-helper: Export dedicated wrappers for GEM object functions")
> Assisted-by: LLM

Throwing LLMs at this kind of things is neither a good use of computing
resources nor a good use of maintainer time. Please refrain from doing
so in the future.

> Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
> ---
>  include/drm/drm_gem_dma_helper.h | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/include/drm/drm_gem_dma_helper.h b/include/drm/drm_gem_dma_helper.h
> index f2678e7ecb9847917e9c6c0287af9815d54bae79..5defd47d7de425515c76391d1825f0ed28077eaa 100644
> --- a/include/drm/drm_gem_dma_helper.h
> +++ b/include/drm/drm_gem_dma_helper.h
> @@ -52,7 +52,7 @@ extern const struct vm_operations_struct drm_gem_dma_vm_ops;
>   * drm_gem_dma_object_free - GEM object function for drm_gem_dma_free()
>   * @obj: GEM object to free
>   *
> - * This function wraps drm_gem_dma_free_object(). Drivers that employ the DMA helpers
> + * This function wraps drm_gem_dma_free(). Drivers that employ the DMA helpers
>   * should use it as their &drm_gem_object_funcs.free handler.
>   */
>  static inline void drm_gem_dma_object_free(struct drm_gem_object *obj)
> @@ -87,7 +87,8 @@ static inline void drm_gem_dma_object_print_info(struct drm_printer *p, unsigned
>   * use it as their &drm_gem_object_funcs.get_sg_table handler.
>   *
>   * Returns:
> - * A pointer to the scatter/gather table of pinned pages or NULL on failure.
> + * A pointer to the scatter/gather table of pinned pages on success, or
> + * an ERR_PTR() on failure.
>   */
>  static inline struct sg_table *drm_gem_dma_object_get_sg_table(struct drm_gem_object *obj)
>  {

-- 
Regards,

Laurent Pinchart