linux-kernel - Re: [PATCH v2 10/17] drm/vram-helper: make drm_vram_mm_debugfs

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Message-ID: <20200318152627.GY2363188@phenom.ffwll.local>
Date:   Wed, 18 Mar 2020 16:26:27 +0100
From:   Daniel Vetter <daniel@...ll.ch>
To:     Wambui Karuga <wambui.karugax@...il.com>
Cc:     airlied@...ux.ie, daniel@...ll.ch,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org
Subject: Re: [PATCH v2 10/17] drm/vram-helper: make
 drm_vram_mm_debugfs_init() return 0

On Tue, Mar 10, 2020 at 04:31:14PM +0300, Wambui Karuga wrote:
> Since 987d65d01356 (drm: debugfs: make
> drm_debugfs_create_files() never fail), drm_debugfs_create_files() never
> fails and should return void. Therefore, remove its use as the
> return value of drm_vram_mm_debugfs_init(), and have the function
> return 0 directly.
> 
> v2: have drm_vram_mm_debugfs_init() return 0 instead of void to avoid
> introducing build issues and build breakage.
> 
> References: https://lists.freedesktop.org/archives/dri-devel/2020-February/257183.html
> Signed-off-by: Wambui Karuga <wambui.karugax@...il.com>
> Acked-by: Thomas Zimmermann <tzimmermann@...e.de>
> ---
>  drivers/gpu/drm/drm_gem_vram_helper.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
> index 92a11bb42365..c8bcc8609650 100644
> --- a/drivers/gpu/drm/drm_gem_vram_helper.c
> +++ b/drivers/gpu/drm/drm_gem_vram_helper.c
> @@ -1048,14 +1048,12 @@ static const struct drm_info_list drm_vram_mm_debugfs_list[] = {
>   */
>  int drm_vram_mm_debugfs_init(struct drm_minor *minor)
>  {
> -	int ret = 0;
> -
>  #if defined(CONFIG_DEBUG_FS)

Just noticed that this #if here is not needed, we already have a dummy
function for that case. Care to write a quick patch to remove it? On top
of this patch series here ofc, I'm in the processing of merging the entire
pile.

Thanks, Daniel
> -	ret = drm_debugfs_create_files(drm_vram_mm_debugfs_list,
> -				       ARRAY_SIZE(drm_vram_mm_debugfs_list),
> -				       minor->debugfs_root, minor);
> +	drm_debugfs_create_files(drm_vram_mm_debugfs_list,
> +				 ARRAY_SIZE(drm_vram_mm_debugfs_list),
> +				 minor->debugfs_root, minor);
>  #endif
> -	return ret;
> +	return 0;
>  }
>  EXPORT_SYMBOL(drm_vram_mm_debugfs_init);
>  
> -- 
> 2.25.1
> 

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