diff --git a/[refs] b/[refs]
index 651945957fd5..24e2e55a7659 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fcb118491bc8bc16c4eeb8142366bcbe17fe615d
+refs/heads/master: a5cf5ce92ecefcbeb3265e6f894905ab3ed5c4c2
diff --git a/trunk/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/trunk/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index ade108232048..e1f3d04a8c90 100644
--- a/trunk/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/trunk/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -258,6 +258,9 @@ int stmmac_mdio_unregister(struct net_device *ndev)
 {
 	struct stmmac_priv *priv = netdev_priv(ndev);
 
+	if (!priv->mii)
+		return 0;
+
 	mdiobus_unregister(priv->mii);
 	priv->mii->priv = NULL;
 	mdiobus_free(priv->mii);