[PATCH v2 23/31] media: pxa_camera: Register V4L2 device early, fix probe error handling

[Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>]

Register V4L2 device before initialising the notifier. This way the device
is available to the notifier from the beginning which makes it possible to
use it for debug prints.

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
 drivers/media/platform/intel/pxa_camera.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/media/platform/intel/pxa_camera.c b/drivers/media/platform/intel/pxa_camera.c
index dad5e8d97683e..5df93fd4ff04b 100644
--- a/drivers/media/platform/intel/pxa_camera.c
+++ b/drivers/media/platform/intel/pxa_camera.c
@@ -2307,6 +2307,10 @@ static int pxa_camera_probe(struct platform_device *pdev)
 		return err;
 	}
 
+	err = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
+	if (err)
+		return err;
+
 	v4l2_async_nf_init(&pcdev->notifier);
 	pcdev->res = res;
 	pcdev->pdata = pdev->dev.platform_data;
@@ -2324,10 +2328,10 @@ static int pxa_camera_probe(struct platform_device *pdev)
 	} else if (pdev->dev.of_node) {
 		err = pxa_camera_pdata_from_dt(&pdev->dev, pcdev);
 	} else {
-		return -ENODEV;
+		err = -ENODEV;
 	}
 	if (err < 0)
-		return err;
+		goto exit_v4l2_device_unregister;
 
 	if (!(pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 |
 			PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10))) {
@@ -2393,22 +2397,17 @@ static int pxa_camera_probe(struct platform_device *pdev)
 	pxa_camera_activate(pcdev);
 
 	platform_set_drvdata(pdev, pcdev);
-	err = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
-	if (err)
-		goto exit_deactivate;
 
 	err = pxa_camera_init_videobuf2(pcdev);
 	if (err)
-		goto exit_v4l2_device_unregister;
+		goto exit_deactivate;
 
 	pcdev->notifier.ops = &pxa_camera_sensor_ops;
 	err = v4l2_async_nf_register(&pcdev->v4l2_dev, &pcdev->notifier);
 	if (err)
-		goto exit_v4l2_device_unregister;
+		goto exit_deactivate;
 
 	return 0;
-exit_v4l2_device_unregister:
-	v4l2_device_unregister(&pcdev->v4l2_dev);
 exit_deactivate:
 	pxa_camera_deactivate(pcdev);
 	tasklet_kill(&pcdev->task_eof);
@@ -2420,6 +2419,8 @@ static int pxa_camera_probe(struct platform_device *pdev)
 	dma_release_channel(pcdev->dma_chans[0]);
 exit_notifier_cleanup:
 	v4l2_async_nf_cleanup(&pcdev->notifier);
+exit_v4l2_device_unregister:
+	v4l2_device_unregister(&pcdev->v4l2_dev);
 	return err;
 }
 
-- 
2.30.2