netdev - [PATCH net-next v2 1/2] staging: fsl-dpaa2/eth: Delay netdev

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Message-Id: <20180829094240.27242-2-ruxandra.radulescu@nxp.com>
Date:   Wed, 29 Aug 2018 04:42:39 -0500
From:   Ioana Radulescu <ruxandra.radulescu@....com>
To:     netdev@...r.kernel.org, davem@...emloft.net
Cc:     gregkh@...uxfoundation.org, andrew@...n.ch,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        ioana.ciornei@....com, laurentiu.tudor@....com,
        madalin.bucur@....com, horia.geanta@....com
Subject: [PATCH net-next v2 1/2] staging: fsl-dpaa2/eth: Delay netdev_register() call

Only call netdev_register() at the end of the probe function,
once all other necessary bits and pieces are properly initialized.

We keep the rest of the netdevice initialization code in place,
at the earlier point of the probing sequence, including the
settings previously done in ndo_init.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@....com>
Suggested-by: Andrew Lunn <andrew@...n.ch>
---
v2: new patch

 drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c | 71 ++++++++++++--------------
 1 file changed, 32 insertions(+), 39 deletions(-)

diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
index 9329fca..559154a 100644
--- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
+++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
@@ -1143,34 +1143,6 @@ static int dpaa2_eth_stop(struct net_device *net_dev)
 	return 0;
 }
 
-static int dpaa2_eth_init(struct net_device *net_dev)
-{
-	u64 supported = 0;
-	u64 not_supported = 0;
-	struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
-	u32 options = priv->dpni_attrs.options;
-
-	/* Capabilities listing */
-	supported |= IFF_LIVE_ADDR_CHANGE;
-
-	if (options & DPNI_OPT_NO_MAC_FILTER)
-		not_supported |= IFF_UNICAST_FLT;
-	else
-		supported |= IFF_UNICAST_FLT;
-
-	net_dev->priv_flags |= supported;
-	net_dev->priv_flags &= ~not_supported;
-
-	/* Features */
-	net_dev->features = NETIF_F_RXCSUM |
-			    NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
-			    NETIF_F_SG | NETIF_F_HIGHDMA |
-			    NETIF_F_LLTX;
-	net_dev->hw_features = net_dev->features;
-
-	return 0;
-}
-
 static int dpaa2_eth_set_addr(struct net_device *net_dev, void *addr)
 {
 	struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
@@ -1418,7 +1390,6 @@ static const struct net_device_ops dpaa2_eth_ops = {
 	.ndo_open = dpaa2_eth_open,
 	.ndo_start_xmit = dpaa2_eth_tx,
 	.ndo_stop = dpaa2_eth_stop,
-	.ndo_init = dpaa2_eth_init,
 	.ndo_set_mac_address = dpaa2_eth_set_addr,
 	.ndo_get_stats64 = dpaa2_eth_get_stats,
 	.ndo_set_rx_mode = dpaa2_eth_set_rx_mode,
@@ -2316,11 +2287,14 @@ static int netdev_init(struct net_device *net_dev)
 {
 	struct device *dev = net_dev->dev.parent;
 	struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
+	u32 options = priv->dpni_attrs.options;
+	u64 supported = 0, not_supported = 0;
 	u8 bcast_addr[ETH_ALEN];
 	u8 num_queues;
 	int err;
 
 	net_dev->netdev_ops = &dpaa2_eth_ops;
+	net_dev->ethtool_ops = &dpaa2_ethtool_ops;
 
 	err = set_mac_addr(priv);
 	if (err)
@@ -2356,12 +2330,23 @@ static int netdev_init(struct net_device *net_dev)
 		return err;
 	}
 
-	/* Our .ndo_init will be called herein */
-	err = register_netdev(net_dev);
-	if (err < 0) {
-		dev_err(dev, "register_netdev() failed\n");
-		return err;
-	}
+	/* Capabilities listing */
+	supported |= IFF_LIVE_ADDR_CHANGE;
+
+	if (options & DPNI_OPT_NO_MAC_FILTER)
+		not_supported |= IFF_UNICAST_FLT;
+	else
+		supported |= IFF_UNICAST_FLT;
+
+	net_dev->priv_flags |= supported;
+	net_dev->priv_flags &= ~not_supported;
+
+	/* Features */
+	net_dev->features = NETIF_F_RXCSUM |
+			    NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+			    NETIF_F_SG | NETIF_F_HIGHDMA |
+			    NETIF_F_LLTX;
+	net_dev->hw_features = net_dev->features;
 
 	return 0;
 }
@@ -2561,28 +2546,36 @@ static int dpaa2_eth_probe(struct fsl_mc_device *dpni_dev)
 	if (err)
 		goto err_alloc_rings;
 
-	net_dev->ethtool_ops = &dpaa2_ethtool_ops;
-
 	err = setup_irqs(dpni_dev);
 	if (err) {
 		netdev_warn(net_dev, "Failed to set link interrupt, fall back to polling\n");
 		priv->poll_thread = kthread_run(poll_link_state, priv,
 						"%s_poll_link", net_dev->name);
 		if (IS_ERR(priv->poll_thread)) {
-			netdev_err(net_dev, "Error starting polling thread\n");
+			dev_err(dev, "Error starting polling thread\n");
 			goto err_poll_thread;
 		}
 		priv->do_link_poll = true;
 	}
 
+	err = register_netdev(net_dev);
+	if (err < 0) {
+		dev_err(dev, "register_netdev() failed\n");
+		goto err_netdev_reg;
+	}
+
 	dev_info(dev, "Probed interface %s\n", net_dev->name);
 	return 0;
 
+err_netdev_reg:
+	if (priv->do_link_poll)
+		kthread_stop(priv->poll_thread);
+	else
+		fsl_mc_free_irqs(dpni_dev);
 err_poll_thread:
 	free_rings(priv);
 err_alloc_rings:
 err_csum:
-	unregister_netdev(net_dev);
 err_netdev_init:
 	free_percpu(priv->percpu_extras);
 err_alloc_percpu_extras:
-- 
2.7.4