From aa1888aa656d638f0e97322b63de2ebcc61d4ca7 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Wed, 15 Mar 2023 08:41:15 +0100 Subject: [PATCH] sh_eth: avoid PHY being resumed when interface is not up [ Upstream commit 8b667d80115406c3c405668996a6d7334985ce46 ] SH_ETH doesn't need mdiobus suspend/resume, that's why it sets 'mac_managed_pm'. However, setting it needs to be moved from init to probe, so mdiobus PM functions will really never be called (e.g. when the interface is not up yet during suspend/resume). Fixes: cf2e91979a0a ("net: sh_eth: Fix PHY state warning splat during system resume") Suggested-by: Heiner Kallweit Signed-off-by: Wolfram Sang Reviewed-by: Michal Kubiak Reviewed-by: Sergey Shtylyov Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/renesas/sh_eth.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index 71a4991133080..14dc5833c465c 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -2029,8 +2029,6 @@ static int sh_eth_phy_init(struct net_device *ndev) if (mdp->cd->register_type != SH_ETH_REG_GIGABIT) phy_set_max_speed(phydev, SPEED_100); - /* Indicate that the MAC is responsible for managing PHY PM */ - phydev->mac_managed_pm = true; phy_attached_info(phydev); return 0; @@ -3074,6 +3072,8 @@ static int sh_mdio_init(struct sh_eth_private *mdp, struct bb_info *bitbang; struct platform_device *pdev = mdp->pdev; struct device *dev = &mdp->pdev->dev; + struct phy_device *phydev; + struct device_node *pn; /* create bit control struct for PHY */ bitbang = devm_kzalloc(dev, sizeof(struct bb_info), GFP_KERNEL); @@ -3108,6 +3108,14 @@ static int sh_mdio_init(struct sh_eth_private *mdp, if (ret) goto out_free_bus; + pn = of_parse_phandle(dev->of_node, "phy-handle", 0); + phydev = of_phy_find_device(pn); + if (phydev) { + phydev->mac_managed_pm = true; + put_device(&phydev->mdio.dev); + } + of_node_put(pn); + return 0; out_free_bus: -- 2.39.5