From: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>
[ 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@xxxxxxxxx>
Fixes: fba863b81604 ("net: phy: make PHY PM ops a no-op if MAC driver manages PHY PM")
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221024072227.24769-1-hayashi.kunihiko@xxxxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/socionext/sni_ave.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c
index ae31ed93aaf0..57dc9680ad50 100644
--- 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);
--
2.35.1
