netdev - [PATCH net-next 08/12] net: enetc: move phylink_start/stop out of enetc

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Date:   Wed, 18 Jan 2023 01:02:30 +0200
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Claudiu Manoil <claudiu.manoil@....com>
Subject: [PATCH net-next 08/12] net: enetc: move phylink_start/stop out of enetc_start/stop

We want to introduce a fast interface reconfiguration procedure, which
involves temporarily stopping the rings.

But we want enetc_start() and enetc_stop() to not restart PHY autoneg,
because that can take a few seconds until it completes again.

So we need part of enetc_start() and enetc_stop(), but not all of them.
Move phylink_start() right next to phylink_of_phy_connect(), and
phylink_stop() right next to phylink_disconnect_phy(), both still in
ndo_open() and ndo_stop().

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 drivers/net/ethernet/freescale/enetc/enetc.c | 26 ++++++++++----------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c
index 543ae8875bc9..014de5425b81 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc.c
@@ -2322,8 +2322,11 @@ static int enetc_phylink_connect(struct net_device *ndev)
 	struct ethtool_eee edata;
 	int err;
 
-	if (!priv->phylink)
-		return 0; /* phy-less mode */
+	if (!priv->phylink) {
+		/* phy-less mode */
+		netif_carrier_on(ndev);
+		return 0;
+	}
 
 	err = phylink_of_phy_connect(priv->phylink, priv->dev->of_node, 0);
 	if (err) {
@@ -2335,6 +2338,8 @@ static int enetc_phylink_connect(struct net_device *ndev)
 	memset(&edata, 0, sizeof(struct ethtool_eee));
 	phylink_ethtool_set_eee(priv->phylink, &edata);
 
+	phylink_start(priv->phylink);
+
 	return 0;
 }
 
@@ -2376,11 +2381,6 @@ void enetc_start(struct net_device *ndev)
 		enable_irq(irq);
 	}
 
-	if (priv->phylink)
-		phylink_start(priv->phylink);
-	else
-		netif_carrier_on(ndev);
-
 	netif_tx_start_all_queues(ndev);
 }
 
@@ -2461,11 +2461,6 @@ void enetc_stop(struct net_device *ndev)
 		napi_disable(&priv->int_vector[i]->napi);
 	}
 
-	if (priv->phylink)
-		phylink_stop(priv->phylink);
-	else
-		netif_carrier_off(ndev);
-
 	enetc_clear_interrupts(priv);
 }
 
@@ -2476,8 +2471,13 @@ int enetc_close(struct net_device *ndev)
 	enetc_stop(ndev);
 	enetc_clear_bdrs(priv);
 
-	if (priv->phylink)
+	if (priv->phylink) {
+		phylink_stop(priv->phylink);
 		phylink_disconnect_phy(priv->phylink);
+	} else {
+		netif_carrier_off(ndev);
+	}
+
 	enetc_free_rxtx_rings(priv);
 
 	/* Avoids dangling pointers and also frees old resources */
-- 
2.34.1