netdev - [PATCH net-next] ravb: Disable Pause Advertisement

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Date:   Fri, 21 Sep 2018 15:52:26 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     David Miller <davem@...emloft.net>
Cc:     Simon Horman <horms@...ge.net.au>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev <netdev@...r.kernel.org>, Andrew Lunn <andrew@...n.ch>
Subject: [PATCH net-next] ravb: Disable Pause Advertisement

The previous commit to ravb had the side effect of making the PHY
advertise Pause and Asym Pause, which previously did not happen.  By
default, phydev->supported has both forms of pause enabled, but
phydev->advertising does not. The new phy_remove_link_mode() copies
phydev->supported to phydev->advertising after removing the requested
link mode. These Pause configuration bits appears it stops the PHY
from completing Auto-Neg and the link remains down.  Be explicit and
remove the Pause and Asym Pause modes, so restoring the old behavior.

Reported-by: Simon Horman <horms@...ge.net.au>
Fixes: 41124fa64d4b ("net: ethernet: Add helper to remove a supported link mode")
Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
I reworded the commit message from what Simon tested.
---
 drivers/net/ethernet/renesas/ravb_main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index fb2a1125780d..b0f2612ad226 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1073,9 +1073,11 @@ static int ravb_phy_init(struct net_device *ndev)
 		netdev_info(ndev, "limited PHY to 100Mbit/s\n");
 	}
 
-	/* 10BASE is not supported */
+	/* 10BASE, Pause and Asym Pause is not supported */
 	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
 	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT);
+	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Pause_BIT);
+	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT);
 
 	phy_attached_info(phydev);
 
-- 
2.19.0.rc1