[PATCH 6.1 206/609] media: stm32: dcmi: unregister notifier on probe failure

6.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Myeonghun Pak <[email protected]>

commit 084973ebd67b28f0945c5d45408f86c58b540110 upstream.

dcmi_graph_init() registers the async notifier before dcmi_probe() toggles
the reset line. If reset_control_assert() or reset_control_deassert()
fails afterwards, probe returns through err_cleanup and the driver core
will not call dcmi_remove().

Unregister the notifier before cleaning it up on that error path,
matching the successful remove path and the V4L2 async notifier lifetime
rules.

Signed-off-by: Myeonghun Pak <[email protected]>
Signed-off-by: Hans Verkuil <[email protected]>
Fixes: d079f94c9046 ("media: platform: Switch to v4l2_async_notifier_add_subdev")
Cc: [email protected]
[hverkuil: added Fixes tag]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
 drivers/media/platform/st/stm32/stm32-dcmi.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/media/platform/st/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/st/stm32/stm32-dcmi.c
@@ -2122,6 +2122,7 @@ static int dcmi_probe(struct platform_de
 	return 0;
 
 err_cleanup:
+	v4l2_async_nf_unregister(&dcmi->notifier);
 	v4l2_async_nf_cleanup(&dcmi->notifier);
 err_media_entity_cleanup:
 	media_entity_cleanup(&dcmi->vdev->entity);