6.6-stable review patch. If anyone has any objections, please let me know.
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From: Nick Hu nick.hu@sifive.com
[ 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 02e11827440b5..3517a2275821f 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c @@ -2161,6 +2161,7 @@ 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;