can: rcar_canfd: rcar_canfd_channel_probe(): register the CAN device when fully ready

Register the CAN device only when all the necessary initialization is
completed. This patch makes sure all the data structures and locks are
initialized before registering the CAN device.

Link: https://lore.kernel.org/all/20220221225935.12300-1-prabhakar.mahadev-lad.rj@bp.renesas.comReported-by: NPavel Machek <pavel@denx.de>
Signed-off-by: NLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: NPavel Machek <pavel@denx.de>
Reviewed-by: NUlrich Hecht <uli+renesas@fpond.eu>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/rcar/rcar_canfd.c

@@ -1715,15 +1715,15 @@ static int rcar_canfd_channel_probe(struct rcar_canfd_global *gpriv, u32 ch,
 
 	netif_napi_add(ndev, &priv->napi, rcar_canfd_rx_poll,
 		       RCANFD_NAPI_WEIGHT);
+	spin_lock_init(&priv->tx_lock);
+	devm_can_led_init(ndev);
+	gpriv->ch[priv->channel] = priv;
 	err = register_candev(ndev);
 	if (err) {
 		dev_err(&pdev->dev,
 			"register_candev() failed, error %d\n", err);
 		goto fail_candev;
 	}
-	spin_lock_init(&priv->tx_lock);
-	devm_can_led_init(ndev);
-	gpriv->ch[priv->channel] = priv;
 	dev_info(&pdev->dev, "device registered (channel %u)\n", priv->channel);
 	return 0;