media: ti-vpe: cal: Add context V4L2 cleanup and unregister functions

Create cal_ctx_v4l2_unregister() and cal_ctx_v4l2_cleanup() functions to
unregister and cleanup the V4L2-related objects from the context, and
call them in cal_remove() and in the error path of cal_probe().
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/ti-vpe/cal.c

@@ -1895,6 +1895,11 @@ static int cal_ctx_v4l2_register(struct cal_ctx *ctx)
 	return 0;
 }
 
+static void cal_ctx_v4l2_unregister(struct cal_ctx *ctx)
+{
+	video_unregister_device(&ctx->vdev);
+}
+
 static int cal_ctx_v4l2_init(struct cal_ctx *ctx)
 {
 	struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler;
@@ -1948,6 +1953,11 @@ static int cal_ctx_v4l2_init(struct cal_ctx *ctx)
 	return 0;
 }
 
+static void cal_ctx_v4l2_cleanup(struct cal_ctx *ctx)
+{
+	v4l2_ctrl_handler_free(&ctx->ctrl_handler);
+}
+
 /* ------------------------------------------------------------------
  *	Initialization and module stuff
  * ------------------------------------------------------------------
@@ -2286,7 +2296,7 @@ static int cal_probe(struct platform_device *pdev)
 		if (ctx) {
 			v4l2_async_notifier_unregister(&ctx->notifier);
 			v4l2_async_notifier_cleanup(&ctx->notifier);
-			v4l2_ctrl_handler_free(&ctx->ctrl_handler);
+			cal_ctx_v4l2_cleanup(ctx);
 		}
 	}
 
@@ -2313,8 +2323,8 @@ static int cal_remove(struct platform_device *pdev)
 			cal_camerarx_disable(ctx->phy);
 			v4l2_async_notifier_unregister(&ctx->notifier);
 			v4l2_async_notifier_cleanup(&ctx->notifier);
-			v4l2_ctrl_handler_free(&ctx->ctrl_handler);
-			video_unregister_device(&ctx->vdev);
+			cal_ctx_v4l2_cleanup(ctx);
+			cal_ctx_v4l2_unregister(ctx);
 		}
 	}