[PATCH] net: bcmgenet: Fix EPHY reset in power up

[Jaedon Shin]

The bcmgenet_mii_reset() is always not running in power up sequence
after 'commit 62469c76007e ("net: ethernet: bcmgenet: use phydev from
struct net_device")'. This'll show extremely high latency and duplicate
packets while interface down and up repeatedly.

For now, adds again a private phydev for mii reset when runs power up to
open interface.

Signed-off-by: Jaedon Shin <jaedon.s...@gmail.com>
---
 drivers/net/ethernet/broadcom/genet/bcmgenet.h | 1 +
 drivers/net/ethernet/broadcom/genet/bcmmii.c   | 9 ++++++---
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.h 
b/drivers/net/ethernet/broadcom/genet/bcmgenet.h
index 0f0868c56f05..1e2dc34d331a 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.h
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.h
@@ -597,6 +597,7 @@ struct bcmgenet_priv {
 
        /* MDIO bus variables */
        wait_queue_head_t wq;
+       struct phy_device *phydev;
        bool internal_phy;
        struct device_node *phy_dn;
        struct device_node *mdio_dn;
diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c 
b/drivers/net/ethernet/broadcom/genet/bcmmii.c
index e907acd81da9..b2bd5302c478 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -183,9 +183,9 @@ void bcmgenet_mii_reset(struct net_device *dev)
        if (GENET_IS_V4(priv))
                return;
 
-       if (dev->phydev) {
-               phy_init_hw(dev->phydev);
-               phy_start_aneg(dev->phydev);
+       if (priv->phydev) {
+               phy_init_hw(priv->phydev);
+               phy_start_aneg(priv->phydev);
        }
 }
 
@@ -383,6 +383,8 @@ int bcmgenet_mii_probe(struct net_device *dev)
                }
        }
 
+       priv->phydev = phydev;
+
        /* Configure port multiplexer based on what the probed PHY device since
         * reading the 'max-speed' property determines the maximum supported
         * PHY speed which is needed for bcmgenet_mii_config() to configure
@@ -605,6 +607,7 @@ static int bcmgenet_mii_pd_init(struct bcmgenet_priv *priv)
 
        }
 
+       priv->phydev = phydev;
        priv->phy_interface = pd->phy_interface;
 
        return 0;
-- 
2.10.0