[PATCH net] net: phy: marvell: don't interpret PHY status unless resolved

* [PATCH net] net: phy: marvell: don't interpret PHY status unless resolved
@ 2020-02-27  9:44 Russell King
  2020-02-27 17:23 ` Florian Fainelli
  2020-02-27 19:19 ` David Miller
  0 siblings, 2 replies; 3+ messages in thread
From: Russell King @ 2020-02-27  9:44 UTC (permalink / raw)
  To: Andrew Lunn, Florian Fainelli, Heiner Kallweit; +Cc: David S. Miller, netdev

Don't attempt to interpret the PHY specific status register unless
the PHY is indicating that the resolution is valid.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
 drivers/net/phy/marvell.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index 28e33ece4ce1..9a8badafea8a 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -1306,6 +1306,9 @@ static int marvell_read_status_page_an(struct phy_device *phydev,
 		}
 	}
 
+	if (!(status & MII_M1011_PHY_STATUS_RESOLVED))
+		return 0;
+
 	if (status & MII_M1011_PHY_STATUS_FULLDUPLEX)
 		phydev->duplex = DUPLEX_FULL;
 	else
@@ -1365,6 +1368,8 @@ static int marvell_read_status_page(struct phy_device *phydev, int page)
 	linkmode_zero(phydev->lp_advertising);
 	phydev->pause = 0;
 	phydev->asym_pause = 0;
+	phydev->speed = SPEED_UNKNOWN;
+	phydev->duplex = DUPLEX_UNKNOWN;
 
 	if (phydev->autoneg == AUTONEG_ENABLE)
 		err = marvell_read_status_page_an(phydev, fiber, status);
-- 
2.20.1


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