Patch "media: staging: ipu3-imgu: Set fields before media_entity_pads_init()" has been added to the 6.8-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    media: staging: ipu3-imgu: Set fields before media_entity_pads_init()

to the 6.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-staging-ipu3-imgu-set-fields-before-media_enti.patch
and it can be found in the queue-6.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 7853345cd2a16d0e3618e6c2bba177cf8d51eefa
Author: Hidenori Kobayashi <hidenorik@xxxxxxxxxxxx>
Date:   Tue Jan 9 17:09:09 2024 +0900

    media: staging: ipu3-imgu: Set fields before media_entity_pads_init()
    
    [ Upstream commit 87318b7092670d4086bfec115a0280a60c51c2dd ]
    
    The imgu driver fails to probe with the following message because it
    does not set the pad's flags before calling media_entity_pads_init().
    
    [   14.596315] ipu3-imgu 0000:00:05.0: failed initialize subdev media entity (-22)
    [   14.596322] ipu3-imgu 0000:00:05.0: failed to register subdev0 ret (-22)
    [   14.596327] ipu3-imgu 0000:00:05.0: failed to register pipes (-22)
    [   14.596331] ipu3-imgu 0000:00:05.0: failed to create V4L2 devices (-22)
    
    Fix the initialization order so that the driver probe succeeds. The ops
    initialization is also moved together for readability.
    
    Fixes: a0ca1627b450 ("media: staging/intel-ipu3: Add v4l2 driver based on media framework")
    Cc: <stable@xxxxxxxxxxxxxxx> # 6.7
    Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
    Signed-off-by: Hidenori Kobayashi <hidenorik@xxxxxxxxxxxx>
    Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
    Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/staging/media/ipu3/ipu3-v4l2.c b/drivers/staging/media/ipu3/ipu3-v4l2.c
index a66f034380c05..3df58eb3e8822 100644
--- a/drivers/staging/media/ipu3/ipu3-v4l2.c
+++ b/drivers/staging/media/ipu3/ipu3-v4l2.c
@@ -1069,6 +1069,11 @@ static int imgu_v4l2_subdev_register(struct imgu_device *imgu,
 	struct imgu_media_pipe *imgu_pipe = &imgu->imgu_pipe[pipe];
 
 	/* Initialize subdev media entity */
+	imgu_sd->subdev.entity.ops = &imgu_media_ops;
+	for (i = 0; i < IMGU_NODE_NUM; i++) {
+		imgu_sd->subdev_pads[i].flags = imgu_pipe->nodes[i].output ?
+			MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
+	}
 	r = media_entity_pads_init(&imgu_sd->subdev.entity, IMGU_NODE_NUM,
 				   imgu_sd->subdev_pads);
 	if (r) {
@@ -1076,11 +1081,6 @@ static int imgu_v4l2_subdev_register(struct imgu_device *imgu,
 			"failed initialize subdev media entity (%d)\n", r);
 		return r;
 	}
-	imgu_sd->subdev.entity.ops = &imgu_media_ops;
-	for (i = 0; i < IMGU_NODE_NUM; i++) {
-		imgu_sd->subdev_pads[i].flags = imgu_pipe->nodes[i].output ?
-			MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
-	}
 
 	/* Initialize subdev */
 	v4l2_subdev_init(&imgu_sd->subdev, &imgu_subdev_ops);
@@ -1177,15 +1177,15 @@ static int imgu_v4l2_node_setup(struct imgu_device *imgu, unsigned int pipe,
 	}
 
 	/* Initialize media entities */
+	node->vdev_pad.flags = node->output ?
+		MEDIA_PAD_FL_SOURCE : MEDIA_PAD_FL_SINK;
+	vdev->entity.ops = NULL;
 	r = media_entity_pads_init(&vdev->entity, 1, &node->vdev_pad);
 	if (r) {
 		dev_err(dev, "failed initialize media entity (%d)\n", r);
 		mutex_destroy(&node->lock);
 		return r;
 	}
-	node->vdev_pad.flags = node->output ?
-		MEDIA_PAD_FL_SOURCE : MEDIA_PAD_FL_SINK;
-	vdev->entity.ops = NULL;
 
 	/* Initialize vbq */
 	vbq->type = node->vdev_fmt.type;