net: ethernet: ave: Fix MAC to be in charge of PHY PM

[ Upstream commit e2badb4bd33abe13ddc35975bd7f7f8693955a4b ]

The phylib callback is called after MAC driver's own resume callback is
called. For AVE driver, after resuming immediately, PHY state machine is
in PHY_NOLINK because there is a time lag from link-down to link-up due to
autoneg. The result is WARN_ON() dump in mdio_bus_phy_resume().

Since ave_resume() itself calls phy_resume(), AVE driver should manage
PHY PM. To indicate that MAC driver manages PHY PM, set
phydev->mac_managed_pm to true to avoid the unnecessary phylib call and
add missing phy_init_hw() to ave_resume().

Suggested-by: Heiner Kallweit <hkallweit1@gmail.com>
Fixes: fba863b81604 ("net: phy: make PHY PM ops a no-op if MAC driver manages PHY PM")
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Link: https://lore.kernel.org/r/20221024072227.24769-1-hayashi.kunihiko@socionext.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c
index ae31ed9..57dc968 100644 (file)
--- a/drivers/net/ethernet/socionext/sni_ave.c
+++ b/drivers/net/ethernet/socionext/sni_ave.c
@@ -1229,6 +1229,8 @@ static int ave_init(struct net_device *ndev)
 
        phy_support_asym_pause(phydev);
 
+       phydev->mac_managed_pm = true;
+
        phy_attached_info(phydev);
 
        return 0;
@@ -1758,6 +1760,10 @@ static int ave_resume(struct device *dev)
 
        ave_global_reset(ndev);
 
+       ret = phy_init_hw(ndev->phydev);
+       if (ret)
+               return ret;
+
        ave_ethtool_get_wol(ndev, &wol);
        wol.wolopts = priv->wolopts;
        __ave_ethtool_set_wol(ndev, &wol);