[PATCH v5 30/38] media: pxa_camera: Register V4L2 device early

[Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>]

Register V4L2 device before initialising the notifier. This way the device
can be made available to the V4L2 async framework from the notifier init
time onwards. A subsequent patch will add struct v4l2_device as an
argument to v4l2_async_nf_init().

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Tested-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> # imx6qp
Tested-by: Niklas Söderlund <niklas.soderlund@xxxxxxxxxxxx> # rcar + adv746x
Tested-by: Aishwarya Kothari <aishwarya.kothari@xxxxxxxxxxx> # Apalis i.MX6Q with TC358743
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> # Renesas RZ/G2L SMARC
---
 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 a583186a5140..a71e26b60c27 100644
--- a/drivers/media/platform/intel/pxa_camera.c
+++ b/drivers/media/platform/intel/pxa_camera.c
@@ -2299,6 +2299,10 @@ static int pxa_camera_probe(struct platform_device *pdev)
 	pcdev->irq = irq;
 	pcdev->base = base;
 
+	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;
@@ -2316,10 +2320,10 @@ 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))) {
@@ -2385,13 +2389,10 @@ 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;
 
 	/* request irq */
 	err = devm_request_irq(&pdev->dev, pcdev->irq, pxa_camera_irq, 0,
@@ -2404,11 +2405,9 @@ static int pxa_camera_probe(struct platform_device *pdev)
 	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;
 }
 
-- 
2.39.2