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sh_eth: avoid PHY being resumed when interface is not up 

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: 6a1dbfefda ("net: sh_eth: Fix PHY state warning splat during system resume")
Suggested-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Wolfram Sang 2023-03-15 08:41:15 +01:00 committed by Jakub Kicinski
parent 7f5ebf5dae
commit c6be7136af
1 changed files with 10 additions and 2 deletions
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12
drivers/net/ethernet/renesas/sh_eth.c
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@ -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;
@ -3097,6 +3095,8 @@ 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);
@ -3133,6 +3133,14 @@ 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: