Am 23.03.20 um 15:49 schrieb Daniel Vetter:
> It's right above the drm_dev_put().
> 
> This allows us to delete a bit of onion unwinding in
> udl_modeset_init().
> 
> This is made possible by a preceeding patch which added a drmm_
> cleanup action to drm_mode_config_init(), hence all we need to do to
> ensure that drm_mode_config_cleanup() is run on final drm_device
> cleanup is check the new error code for _init().
> 
> v2: Explain why this cleanup is possible (Laurent).
> 
> v3: Use drmm_mode_config_init() for more clarity (Sam, Thomas)
> 
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Cc: Thomas Zimmermann <tzimmermann@suse.de>
> Acked-by: Sam Ravnborg <sam@ravnborg.org>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Cc: Dave Airlie <airlied@redhat.com>
> Cc: Sean Paul <sean@poorly.run>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Thomas Zimmermann <tzimmermann@suse.de>
> Cc: Emil Velikov <emil.l.velikov@gmail.com>
> Cc: Gerd Hoffmann <kraxel@redhat.com>
> Cc: "Noralf Trønnes" <noralf@tronnes.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Sam Ravnborg <sam@ravnborg.org>

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
>  drivers/gpu/drm/udl/udl_drv.c     |  1 -
>  drivers/gpu/drm/udl/udl_drv.h     |  1 -
>  drivers/gpu/drm/udl/udl_modeset.c | 21 ++++++---------------
>  3 files changed, 6 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c
> index 8b78c356beb5..b447fb053e78 100644
> --- a/drivers/gpu/drm/udl/udl_drv.c
> +++ b/drivers/gpu/drm/udl/udl_drv.c
> @@ -37,7 +37,6 @@ DEFINE_DRM_GEM_FOPS(udl_driver_fops);
>  static void udl_driver_release(struct drm_device *dev)
>  {
>  	udl_fini(dev);
> -	udl_modeset_cleanup(dev);
>  }
>  
>  static struct drm_driver driver = {
> diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h
> index e67227c44cc4..1de7eb1b6aac 100644
> --- a/drivers/gpu/drm/udl/udl_drv.h
> +++ b/drivers/gpu/drm/udl/udl_drv.h
> @@ -68,7 +68,6 @@ struct udl_device {
>  
>  /* modeset */
>  int udl_modeset_init(struct drm_device *dev);
> -void udl_modeset_cleanup(struct drm_device *dev);
>  struct drm_connector *udl_connector_init(struct drm_device *dev);
>  
>  struct urb *udl_get_urb(struct drm_device *dev);
> diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_modeset.c
> index d59ebac70b15..8cad01f3d163 100644
> --- a/drivers/gpu/drm/udl/udl_modeset.c
> +++ b/drivers/gpu/drm/udl/udl_modeset.c
> @@ -468,7 +468,9 @@ int udl_modeset_init(struct drm_device *dev)
>  	struct drm_connector *connector;
>  	int ret;
>  
> -	drm_mode_config_init(dev);
> +	ret = drmm_mode_config_init(dev);
> +	if (ret)
> +		return ret;
>  
>  	dev->mode_config.min_width = 640;
>  	dev->mode_config.min_height = 480;
> @@ -482,10 +484,8 @@ int udl_modeset_init(struct drm_device *dev)
>  	dev->mode_config.funcs = &udl_mode_funcs;
>  
>  	connector = udl_connector_init(dev);
> -	if (IS_ERR(connector)) {
> -		ret = PTR_ERR(connector);
> -		goto err_drm_mode_config_cleanup;
> -	}
> +	if (IS_ERR(connector))
> +		return PTR_ERR(connector);
>  
>  	format_count = ARRAY_SIZE(udl_simple_display_pipe_formats);
>  
> @@ -494,18 +494,9 @@ int udl_modeset_init(struct drm_device *dev)
>  					   udl_simple_display_pipe_formats,
>  					   format_count, NULL, connector);
>  	if (ret)
> -		goto err_drm_mode_config_cleanup;
> +		return ret;
>  
>  	drm_mode_config_reset(dev);
>  
>  	return 0;
> -
> -err_drm_mode_config_cleanup:
> -	drm_mode_config_cleanup(dev);
> -	return ret;
> -}
> -
> -void udl_modeset_cleanup(struct drm_device *dev)
> -{
> -	drm_mode_config_cleanup(dev);
>  }
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer