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stmmac: Stop advertising 1000Base capabilties for non GMII iface (V4). 

This patch stops advertising 1000Base capablities if GMAC is either
configured for MII or RMII mode and on board there is a GPHY plugged on.
Without this patch if an GBit switch is connected on MII interface,
Ethernet stops working at all.

Discovered as part of
https://bugzilla.stlinux.com/show_bug.cgi?id=14148 triage

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Srinivas Kandagatla 2011-10-18 00:01:18 +00:00 committed by David S. Miller
parent 903e21e2ee
commit 79ee1dc32b
1 changed files with 10 additions and 3 deletions
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13
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -304,7 +304,7 @@ static int stmmac_init_phy(struct net_device *dev)
struct phy_device *phydev;
char phy_id[MII_BUS_ID_SIZE + 3];
char bus_id[MII_BUS_ID_SIZE];
int interface = priv->plat->interface;
priv->oldlink = 0;
priv->speed = 0;
priv->oldduplex = -1;
@ -314,14 +314,21 @@ static int stmmac_init_phy(struct net_device *dev)
priv->plat->phy_addr);
pr_debug("stmmac_init_phy: trying to attach to %s\n", phy_id);
phydev = phy_connect(dev, phy_id, &stmmac_adjust_link, 0,
priv->plat->interface);
phydev = phy_connect(dev, phy_id, &stmmac_adjust_link, 0, interface);
if (IS_ERR(phydev)) {
pr_err("%s: Could not attach to PHY\n", dev->name);
return PTR_ERR(phydev);
}
/* Stop Advertising 1000BASE Capability if interface is not GMII */
if ((interface) && ((interface == PHY_INTERFACE_MODE_MII) ||
(interface == PHY_INTERFACE_MODE_RMII))) {
phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
SUPPORTED_Asym_Pause);
priv->phydev->advertising = priv->phydev->supported;
}
/*
* Broken HW is sometimes missing the pull-up resistor on the
* MDIO line, which results in reads to non-existent devices returning