net: phy: fix auto negotiation checking for teranetics

Shaohui Xie · davem330 · commit 94724d102c82 · 2015-07-27T01:04:30.000-07:00
When using fiber port, the phy cannot report it's auto negotiation state,
driver should always report auto negotiation is done when using fiber port.

Signed-off-by: Shaohui Xie &lt;Shaohui.Xie@freescale.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
diff --git a/drivers/net/phy/teranetics.c b/drivers/net/phy/teranetics.c
@@ -51,8 +51,15 @@ static int teranetics_aneg_done(struct phy_device *phydev)
 {
 	int reg;
 
-	reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
-	return (reg < 0) ? reg : (reg & BMSR_ANEGCOMPLETE);
+	/* auto negotiation state can only be checked when using copper
+	 * port, if using fiber port, just lie it's done.
+	 */
+	if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) {
+		reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
+		return (reg < 0) ? reg : (reg & BMSR_ANEGCOMPLETE);
+	}
+
+	return 1;
 }
 
 static int teranetics_config_aneg(struct phy_device *phydev)
