From: Russell King <rmk+kernel@armlinux.org.uk>
Date: Tue, 30 May 2017 15:21:51 +0000 (+0100)
Subject: net: phy: fix marvell phy status reading
X-Git-Tag: archive/raspbian/4.9.30-2+deb9u2+rpi1~4^2~251
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=65792e48079173f7ceede82cca4987031283b530;p=linux-4.9.git

net: phy: fix marvell phy status reading

commit 898805e0cdf7fd860ec21bf661d3a0285a3defbd upstream.

The Marvell driver incorrectly provides phydev->lp_advertising as the
logical and of the link partner's advert and our advert.  This is
incorrect - this field is supposed to store the link parter's unmodified
advertisment.

This allows ethtool to report the correct link partner auto-negotiation
status.

Fixes: be937f1f89ca ("Marvell PHY m88e1111 driver fix")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index 21e116e75166..7f01099ae42f 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -1118,8 +1118,6 @@ static int marvell_read_status_page(struct phy_device *phydev, int page)
 		if (adv < 0)
 			return adv;
 
-		lpa &= adv;
-
 		if (status & MII_M1011_PHY_STATUS_FULLDUPLEX)
 			phydev->duplex = DUPLEX_FULL;
 		else