drm/udl: Drop explicit drm_mode_config_cleanup call

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)
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
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>
Link: https://patchwork.freedesktop.org/patch/msgid/20200323144950.3018436-50-daniel.vetter@ffwll.ch

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 = {

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);

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);
 }