linux-kernel - [PATCH] net: phy: fix wrong mask to phy

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Message-Id: <20180212110252.27804-1-inguin@gmx.de>
Date:   Mon, 12 Feb 2018 12:02:52 +0100
From:   Ingo van Lil <inguin@....de>
To:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Russell King <rmk+kernel@...linux.org.uk>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ingo van Lil <inguin@....de>
Subject: [PATCH] net: phy: fix wrong mask to phy_modify()

When forcing a specific link mode, the PHY driver must clear the
existing speed and duplex bits in BMCR while preserving some other
control bits. This logic was accidentally inverted with the introduction
of phy_modify().

Signed-off-by: Ingo van Lil <inguin@....de>
---
 drivers/net/phy/phy_device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index b13eed21c87d..d39ae77707ef 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1382,7 +1382,7 @@ int genphy_setup_forced(struct phy_device *phydev)
 		ctl |= BMCR_FULLDPLX;
 
 	return phy_modify(phydev, MII_BMCR,
-			  BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN, ctl);
+			  ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
 }
 EXPORT_SYMBOL(genphy_setup_forced);
 
-- 
2.14.3