linux-kernel - Re: [PATCH] drm: Remove unused code to load the non-existing fbcon.ko

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Message-ID: <YRz+JZQqvBRm+L1A@phenom.ffwll.local>
Date:   Wed, 18 Aug 2021 14:33:41 +0200
From:   Daniel Vetter <daniel@...ll.ch>
To:     Javier Martinez Canillas <javierm@...hat.com>
Cc:     linux-kernel@...r.kernel.org, Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] drm: Remove unused code to load the non-existing fbcon.ko

On Wed, Aug 18, 2021 at 02:09:48PM +0200, Javier Martinez Canillas wrote:
> Commit 6104c37094e7 ("fbcon: Make fbcon a built-time depency for fbdev")
> changed the FRAMEBUFFER_CONSOLE Kconfig symbol from tristate to bool.
> 
> But the drm_kms_helper_init() function still attempts to load the fbcon
> module, even when this is always built-in since the mentioned change.
> 
> Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>

Nice catch. Merged to drm-misc-next for 5.16, thanks.
-Daniel

> ---
> 
>  drivers/gpu/drm/drm_kms_helper_common.c | 11 -----------
>  1 file changed, 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_kms_helper_common.c b/drivers/gpu/drm/drm_kms_helper_common.c
> index f933da1656eb..47e92400548d 100644
> --- a/drivers/gpu/drm/drm_kms_helper_common.c
> +++ b/drivers/gpu/drm/drm_kms_helper_common.c
> @@ -64,17 +64,6 @@ MODULE_PARM_DESC(edid_firmware,
>  
>  static int __init drm_kms_helper_init(void)
>  {
> -	/*
> -	 * The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
> -	 * but the module doesn't depend on any fb console symbols.  At least
> -	 * attempt to load fbcon to avoid leaving the system without a usable
> -	 * console.
> -	 */
> -	if (IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION) &&
> -	    IS_MODULE(CONFIG_FRAMEBUFFER_CONSOLE) &&
> -	    !IS_ENABLED(CONFIG_EXPERT))
> -		request_module_nowait("fbcon");
> -
>  	return drm_dp_aux_dev_init();
>  }
>  
> -- 
> 2.31.1
> 

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