Re: [PATCH v7 2/2] drm/shmem-helper: Correct doc-comment of drm_gem_shmem_get_sg_table()

[Daniel Vetter]

On Thu, Jun 30, 2022 at 11:00:58PM +0300, Dmitry Osipenko wrote:
> drm_gem_shmem_get_sg_table() never returns NULL on error, but a ERR_PTR.
> Correct the doc comment which says that it returns NULL on error.
> 
> Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/drm_gem_shmem_helper.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
> index 904fc893c905..0b526657fbea 100644
> --- a/drivers/gpu/drm/drm_gem_shmem_helper.c
> +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
> @@ -663,7 +663,8 @@ EXPORT_SYMBOL(drm_gem_shmem_print_info);
>   * drm_gem_shmem_get_pages_sgt() instead.
>   *
>   * 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 or an ERR_PTR()-encoded
> + * error code on failure.

There was a conflict here because another patch adjusted this already, but
I fixed it up and merged this to drm-misc-next.

Thanks, Daniel

>   */
>  struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_shmem_object *shmem)
>  {
> @@ -689,7 +690,8 @@ EXPORT_SYMBOL_GPL(drm_gem_shmem_get_sg_table);
>   * drm_gem_shmem_get_sg_table() should not be directly called by drivers.
>   *
>   * Returns:
> - * A pointer to the scatter/gather table of pinned pages or errno on failure.
> + * A pointer to the scatter/gather table of pinned pages or an ERR_PTR()-encoded
> + * error code on failure.
>   */
>  struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_shmem_object *shmem)
>  {
> -- 
> 2.36.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch