[PATCH] media: stm32: dcmi: unregister notifier on probe failure

[박명훈]

From: Myeonghun Pak <mhun512 at gmail.com>

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.

The local history only contains a Linux 7.0 snapshot, so the introducing
commit could not be identified from this worktree and no Fixes tag is
included in this draft.

Signed-off-by: Myeonghun Pak <mhun512 at gmail.com>
---
 drivers/media/platform/st/stm32/stm32-dcmi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/st/stm32/stm32-dcmi.c b/drivers/media/platform/st/stm32/stm32-dcmi.c
index 13762861b7..200b498127 100644
--- a/drivers/media/platform/st/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/st/stm32/stm32-dcmi.c
@@ -2063,6 +2063,7 @@ static int dcmi_probe(struct platform_device *pdev)
 	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);
-- 
2.47.1