[PATCH 1/1] drm: ttm: Don't bail from ttm_global_init if debugfs_create_dir fails

[Huacai Chen]

Tested-by: Huacai Chen <chenhuacai at loongson.cn>

On Wed, Aug 11, 2021 at 6:42 AM Dan Moulding <dmoulding at me.com> wrote:
>
> In 69de4421bb4c ("drm/ttm: Initialize debugfs from
> ttm_global_init()"), ttm_global_init was changed so that if creation
> of the debugfs global root directory fails, ttm_global_init will bail
> out early and return an error, leading to initialization failure of
> DRM drivers. However, not every system will be using debugfs. On such
> a system, debugfs directory creation can be expected to fail, but DRM
> drivers must still be usable. This changes it so that if creation of
> TTM's debugfs root directory fails, then no biggie: keep calm and
> carry on.
>
> Fixes: 69de4421bb4c ("drm/ttm: Initialize debugfs from ttm_global_init()")
> Signed-off-by: Dan Moulding <dmoulding at me.com>
> ---
>  drivers/gpu/drm/ttm/ttm_device.c | 2 --
>  1 file changed, 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c
> index 74e3b460132b..2df59b3c2ea1 100644
> --- a/drivers/gpu/drm/ttm/ttm_device.c
> +++ b/drivers/gpu/drm/ttm/ttm_device.c
> @@ -78,9 +78,7 @@ static int ttm_global_init(void)
>
>         ttm_debugfs_root = debugfs_create_dir("ttm", NULL);
>         if (IS_ERR(ttm_debugfs_root)) {
> -               ret = PTR_ERR(ttm_debugfs_root);
>                 ttm_debugfs_root = NULL;
> -               goto out;
>         }
>
>         /* Limit the number of pages in the pool to about 50% of the total
> --
> 2.31.1
>