From 6e49e63d245bb10c857d67111b512a6d1af43eb7 Mon Sep 17 00:00:00 2001
From: Nick Hu <nick.hu@sifive.com>
Date: Mon, 17 Feb 2025 13:58:42 +0800
Subject: [PATCH] net: axienet: Set mac_managed_pm
[ Upstream commit a370295367b55662a32a4be92565fe72a5aa79bb ]
The external PHY will undergo a soft reset twice during the resume process
when it wake up from suspend. The first reset occurs when the axienet
driver calls phylink_of_phy_connect(), and the second occurs when
mdio_bus_phy_resume() invokes phy_init_hw(). The second soft reset of the
external PHY does not reinitialize the internal PHY, which causes issues
with the internal PHY, resulting in the PHY link being down. To prevent
this, setting the mac_managed_pm flag skips the mdio_bus_phy_resume()
function.
Fixes: a129b41fe0a8 ("Revert "net: phy: dp83867: perform soft reset and retain established link"")
Signed-off-by: Nick Hu <nick.hu@sifive.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20250217055843.19799-1-nick.hu@sifive.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
index de10a2d08c428..fe3438abcd253 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -2888,6 +2888,7 @@ static int axienet_probe(struct platform_device *pdev)
lp->phylink_config.dev = &ndev->dev;
lp->phylink_config.type = PHYLINK_NETDEV;
+ lp->phylink_config.mac_managed_pm = true;
lp->phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_ASYM_PAUSE |
MAC_10FD | MAC_100FD | MAC_1000FD;
--
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