[PATCH] net: lan743x: disconnect the PHY when PTP setup fails

[Wentao Liang <vulab@iscas.ac.cn>]

lan743x_netdev_open() connects the PHY before opening PTP, but if
lan743x_ptp_open() fails it jumps to close_mac, which skips
lan743x_phylink_disconnect(). The reference taken by
phylink_connect_phy() is then never released, and the PHY stays
attached to the phylink instance.

Add a close_phylink label in front of the phylink disconnect, as the
pre-phylink conversion code did with close_phy, and use it on the
lan743x_ptp_open() failure path.

Fixes: a5f199a8d8a0 ("net: lan743x: Migrate phylib to phylink")
Cc: stable@vger.kernel.org
Assisted-by: DeepSeek-V4.1-Flash and OpenAI Codex
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
---
 drivers/net/ethernet/microchip/lan743x_main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index 82d3ec20ba25..390aec639c71 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -3331,7 +3331,7 @@ static int lan743x_netdev_open(struct net_device *netdev)
 
 	ret = lan743x_ptp_open(adapter);
 	if (ret)
-		goto close_mac;
+		goto close_phylink;
 
 	lan743x_rfe_open(adapter);
 
@@ -3374,6 +3374,8 @@ static int lan743x_netdev_open(struct net_device *netdev)
 			lan743x_rx_close(&adapter->rx[index]);
 	}
 	lan743x_ptp_close(adapter);
+
+close_phylink:
 	if (adapter->phylink)
 		lan743x_phylink_disconnect(adapter);
 
-- 
2.34.1