[PATCH 1/3] net: ethoc: don't advertise gigabit speed on attached PHY

[Max Filippov]

OpenCores 10/100 Mbps MAC does not support speeds above 100 Mbps, but does
not disable advertisement when PHY supports them. This results in
non-functioning network when the MAC is connected to a gigabit PHY connected
to a gigabit switch.

The fix is to disable gigabit speed advertisement on attached PHY
unconditionally.

Signed-off-by: Max Filippov <jcmvbkbc@xxxxxxxxx>
---
 drivers/net/ethernet/ethoc.c | 3 +++
 include/linux/phy.h          | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/ethoc.c b/drivers/net/ethernet/ethoc.c
index 4de8cfd..e817d58 100644
--- a/drivers/net/ethernet/ethoc.c
+++ b/drivers/net/ethernet/ethoc.c
@@ -688,6 +688,9 @@ static int ethoc_mdio_probe(struct net_device *dev)
 	}

 	priv->phy = phy;
+	phy_update_adv(phy,
+		       ~(ADVERTISED_1000baseT_Full |
+			 ADVERTISED_1000baseT_Half), 0);
 	return 0;
 }

diff --git a/include/linux/phy.h b/include/linux/phy.h
index 48a4dc3..0282a8d 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -559,6 +559,11 @@ static inline int phy_read_status(struct phy_device *phydev) {
 	return phydev->drv->read_status(phydev);
 }

+static inline void phy_update_adv(struct phy_device *phydev, u32 mask, u32 set)
+{
+	phydev->advertising = (phydev->advertising & mask) | set;
+}
+
 int genphy_setup_forced(struct phy_device *phydev);
 int genphy_restart_aneg(struct phy_device *phydev);
 int genphy_config_aneg(struct phy_device *phydev);
-- 
1.8.1.4


-- 
Thanks.
-- Max
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