netdev - [PATCH v3 1/2] net: ethoc: don't advertise gigabit speed on attached PHY

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Message-Id: <1391470390-31569-2-git-send-email-jcmvbkbc@gmail.com>
Date:	Tue,  4 Feb 2014 03:33:09 +0400
From:	Max Filippov <jcmvbkbc@...il.com>
To:	linux-xtensa@...ux-xtensa.org, netdev@...r.kernel.org
Cc:	Chris Zankel <chris@...kel.net>, Marc Gauthier <marc@...ence.com>,
	"David S. Miller" <davem@...emloft.net>,
	Ben Hutchings <ben@...adent.org.uk>,
	Florian Fainelli <f.fainelli@...il.com>,
	Max Filippov <jcmvbkbc@...il.com>
Subject: [PATCH v3 1/2] net: ethoc: don't advertise gigabit speed on attached PHY

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@...il.com>
---
Changes v2->v3:
- don't call phy_start_aneg to force phylib to disable gigabit advertisement.

Changes v1->v2:
- disable both gigabit advertisement and support.

 drivers/net/ethernet/ethoc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/ethoc.c b/drivers/net/ethernet/ethoc.c
index 5ca7719..6aef639 100644
--- a/drivers/net/ethernet/ethoc.c
+++ b/drivers/net/ethernet/ethoc.c
@@ -691,6 +691,11 @@ static int ethoc_mdio_probe(struct net_device *dev)
 	}
 
 	priv->phy = phy;
+	phy->advertising &= ~(ADVERTISED_1000baseT_Full |
+			      ADVERTISED_1000baseT_Half);
+	phy->supported &= ~(SUPPORTED_1000baseT_Full |
+			    SUPPORTED_1000baseT_Half);
+
 	return 0;
 }
 
-- 
1.8.1.4

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