1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c
index 508fba8fa07f..79a938117878 100644
--- a/drivers/net/stmmac/stmmac_main.c
+++ b/drivers/net/stmmac/stmmac_main.c
@@ -305,8 +305,8 @@ static int stmmac_init_phy(struct net_device *dev)
 {
         struct stmmac_priv *priv = netdev_priv(dev);
         struct phy_device *phydev;
-        char phy_id[BUS_ID_SIZE];       /* PHY to connect */
-        char bus_id[BUS_ID_SIZE];
+        char phy_id[MII_BUS_ID_SIZE + 3];
+        char bus_id[MII_BUS_ID_SIZE];
 
         priv->oldlink = 0;
         priv->speed = 0;
@@ -318,7 +318,8 @@ static int stmmac_init_phy(struct net_device *dev)
         }
 
         snprintf(bus_id, MII_BUS_ID_SIZE, "%x", priv->bus_id);
-        snprintf(phy_id, BUS_ID_SIZE, PHY_ID_FMT, bus_id, priv->phy_addr);
+        snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, bus_id,
+                 priv->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,