linux-kernel - [PATCH net-next 1/4] net: ethernet: am65-cpsw: call netif_carrier

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Message-Id: <20250115-am65-cpsw-streamline-v1-1-326975c36935@kernel.org>
Date: Wed, 15 Jan 2025 18:43:00 +0200
From: Roger Quadros <rogerq@...nel.org>
To: Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Russell King <linux@...linux.org.uk>, Alexei Starovoitov <ast@...nel.org>, 
 Daniel Borkmann <daniel@...earbox.net>, 
 Jesper Dangaard Brouer <hawk@...nel.org>, 
 John Fastabend <john.fastabend@...il.com>
Cc: Siddharth Vadapalli <s-vadapalli@...com>, srk@...com, 
 danishanwar@...com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 bpf@...r.kernel.org, Roger Quadros <rogerq@...nel.org>
Subject: [PATCH net-next 1/4] net: ethernet: am65-cpsw: call
 netif_carrier_on/off() when appropriate

Call netif_carrier_on/off when link is up/down.
When link is up only wake TX netif queue if network device is
running.

Signed-off-by: Roger Quadros <rogerq@...nel.org>
---
 drivers/net/ethernet/ti/am65-cpsw-nuss.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index dcb6662b473d..36c29d3db329 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -2155,6 +2155,7 @@ static void am65_cpsw_nuss_mac_link_down(struct phylink_config *config, unsigned
 	cpsw_sl_ctl_clr(port->slave.mac_sl, mac_control);

 	am65_cpsw_qos_link_down(ndev);
+	netif_carrier_off(ndev);
 	netif_tx_stop_all_queues(ndev);
 }

@@ -2196,7 +2197,9 @@ static void am65_cpsw_nuss_mac_link_up(struct phylink_config *config, struct phy
 	cpsw_ale_control_set(common->ale, port->port_id, ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);

 	am65_cpsw_qos_link_up(ndev, speed);
-	netif_tx_wake_all_queues(ndev);
+	netif_carrier_on(ndev);
+	if (netif_running(ndev))
+		netif_tx_wake_all_queues(ndev);
 }

 static const struct phylink_mac_ops am65_cpsw_phylink_mac_ops = {

-- 
2.34.1