media: staging/intel-ipu3: Cleanup dummy buffers via helper

Use an existing helper imgu_video_nodes_exit() on imgu-video-node
initialization failure path to cleanup dummy buffers.
Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/ipu3/ipu3.c

@@ -440,6 +440,16 @@ int imgu_s_stream(struct imgu_device *imgu, int enable)
 	return r;
 }
 
+static void imgu_video_nodes_exit(struct imgu_device *imgu)
+{
+	int i;
+
+	for (i = 0; i < IMGU_MAX_PIPE_NUM; i++)
+		imgu_dummybufs_cleanup(imgu, i);
+
+	imgu_v4l2_unregister(imgu);
+}
+
 static int imgu_video_nodes_init(struct imgu_device *imgu)
 {
 	struct v4l2_pix_format_mplane *fmts[IPU3_CSS_QUEUES] = { NULL };
@@ -489,24 +499,11 @@ static int imgu_video_nodes_init(struct imgu_device *imgu)
 	return 0;
 
 out_cleanup:
-	for (j = 0; j < IMGU_MAX_PIPE_NUM; j++)
-		imgu_dummybufs_cleanup(imgu, j);
-
-	imgu_v4l2_unregister(imgu);
+	imgu_video_nodes_exit(imgu);
 
 	return r;
 }
 
-static void imgu_video_nodes_exit(struct imgu_device *imgu)
-{
-	int i;
-
-	for (i = 0; i < IMGU_MAX_PIPE_NUM; i++)
-		imgu_dummybufs_cleanup(imgu, i);
-
-	imgu_v4l2_unregister(imgu);
-}
-
 /**************** PCI interface ****************/
 
 static irqreturn_t imgu_isr_threaded(int irq, void *imgu_ptr)