media: davinci: Init async notifier after registering V4L2 device

Initialise the V4L2 async notifier after registering the V4L2 device, just
before parsing DT for async sub-devices. 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@linux.intel.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de> # imx6qp
Tested-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> # rcar + adv746x
Tested-by: Aishwarya Kothari <aishwarya.kothari@toradex.com> # Apalis i.MX6Q with TC358743
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> # Renesas RZ/G2L SMARC
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/ti/davinci/vpif_capture.c

@@ -1608,18 +1608,12 @@ static __init int vpif_probe(struct platform_device *pdev)
 	int res_idx = 0;
 	int i, err;
 
-	pdev->dev.platform_data = vpif_capture_get_pdata(pdev);
-	if (!pdev->dev.platform_data) {
-		dev_warn(&pdev->dev, "Missing platform data.  Giving up.\n");
-		return -EINVAL;
-	}
-
 	vpif_dev = &pdev->dev;
 
 	err = initialize_vpif();
 	if (err) {
 		v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
-		goto cleanup;
+		return err;
 	}
 
 	err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
@@ -1646,13 +1640,19 @@ static __init int vpif_probe(struct platform_device *pdev)
 			goto vpif_unregister;
 	} while (++res_idx);
 
+	pdev->dev.platform_data = vpif_capture_get_pdata(pdev);
+	if (!pdev->dev.platform_data) {
+		dev_warn(&pdev->dev, "Missing platform data. Giving up.\n");
+		goto vpif_unregister;
+	}
+
 	vpif_obj.config = pdev->dev.platform_data;
 
 	subdev_count = vpif_obj.config->subdev_count;
 	vpif_obj.sd = kcalloc(subdev_count, sizeof(*vpif_obj.sd), GFP_KERNEL);
 	if (!vpif_obj.sd) {
 		err = -ENOMEM;
-		goto vpif_unregister;
+		goto probe_subdev_out;
 	}
 
 	if (!vpif_obj.config->asd_sizes[0]) {
@@ -1695,14 +1695,13 @@ static __init int vpif_probe(struct platform_device *pdev)
 	return 0;
 
 probe_subdev_out:
+	v4l2_async_nf_cleanup(&vpif_obj.notifier);
 	/* free sub devices memory */
 	kfree(vpif_obj.sd);
 vpif_unregister:
 	v4l2_device_unregister(&vpif_obj.v4l2_dev);
 vpif_free:
 	free_vpif_objs();
-cleanup:
-	v4l2_async_nf_cleanup(&vpif_obj.notifier);
 
 	return err;
 }