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>
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 87a6b2e..ae5debb 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -304,7 +304,7 @@
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 @@
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