media: rkisp1: Simplify rkisp1_entities_register() error path

Now that all the unregistration functions are safe to call on
non-registered entities, the error path in rkisp1_entities_register()
can be simplified. Factor out the unregistration to a separate function
to share code with rkisp1_remove().
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Dafna Hirschfeld <dafna@fastmail.com>
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c

@@ -346,48 +346,50 @@ static const struct dev_pm_ops rkisp1_pm_ops = {
  * Core
  */
 
+static void rkisp1_entities_unregister(struct rkisp1_device *rkisp1)
+{
+	rkisp1_params_unregister(rkisp1);
+	rkisp1_stats_unregister(rkisp1);
+	rkisp1_capture_devs_unregister(rkisp1);
+	rkisp1_resizer_devs_unregister(rkisp1);
+	rkisp1_isp_unregister(rkisp1);
+}
+
 static int rkisp1_entities_register(struct rkisp1_device *rkisp1)
 {
 	int ret;
 
 	ret = rkisp1_isp_register(rkisp1);
 	if (ret)
-		return ret;
+		goto error;
 
 	ret = rkisp1_resizer_devs_register(rkisp1);
 	if (ret)
-		goto err_unreg_isp_subdev;
+		goto error;
 
 	ret = rkisp1_capture_devs_register(rkisp1);
 	if (ret)
-		goto err_unreg_resizer_devs;
+		goto error;
 
 	ret = rkisp1_stats_register(rkisp1);
 	if (ret)
-		goto err_unreg_capture_devs;
+		goto error;
 
 	ret = rkisp1_params_register(rkisp1);
 	if (ret)
-		goto err_unreg_stats;
+		goto error;
 
 	ret = rkisp1_subdev_notifier(rkisp1);
 	if (ret) {
 		dev_err(rkisp1->dev,
 			"Failed to register subdev notifier(%d)\n", ret);
-		goto err_unreg_params;
+		goto error;
 	}
 
 	return 0;
-err_unreg_params:
-	rkisp1_params_unregister(rkisp1);
-err_unreg_stats:
-	rkisp1_stats_unregister(rkisp1);
-err_unreg_capture_devs:
-	rkisp1_capture_devs_unregister(rkisp1);
-err_unreg_resizer_devs:
-	rkisp1_resizer_devs_unregister(rkisp1);
-err_unreg_isp_subdev:
-	rkisp1_isp_unregister(rkisp1);
+
+error:
+	rkisp1_entities_unregister(rkisp1);
 	return ret;
 }
 
@@ -583,11 +585,7 @@ static int rkisp1_remove(struct platform_device *pdev)
 	v4l2_async_nf_unregister(&rkisp1->notifier);
 	v4l2_async_nf_cleanup(&rkisp1->notifier);
 
-	rkisp1_params_unregister(rkisp1);
-	rkisp1_stats_unregister(rkisp1);
-	rkisp1_capture_devs_unregister(rkisp1);
-	rkisp1_resizer_devs_unregister(rkisp1);
-	rkisp1_isp_unregister(rkisp1);
+	rkisp1_entities_unregister(rkisp1);
 
 	media_device_unregister(&rkisp1->media_dev);
 	v4l2_device_unregister(&rkisp1->v4l2_dev);