[PATCH] phy: Added a macro to represent the string format used to match a phy device

Add the PHY_ID_FMT macro to ensure that the format of the id string used by a
driver to match to its specific phy is consistent between the mdio_bus and the
driver.

Signed-off-by: Kumar Gala <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Jeff Garzik <[email protected]>

drivers/net/phy/mdio_bus.c

@@ -81,7 +81,7 @@ int mdiobus_register(struct mii_bus *bus)
 
 			phydev->dev.parent = bus->dev;
 			phydev->dev.bus = &mdio_bus_type;
-			sprintf(phydev->dev.bus_id, "phy%d:%d", bus->id, i);
+			snprintf(phydev->dev.bus_id, BUS_ID_SIZE, PHY_ID_FMT, bus->id, i);
 
 			phydev->bus = bus;
 

drivers/net/phy/phy.c

@@ -42,7 +42,7 @@
  */
 void phy_print_status(struct phy_device *phydev)
 {
-	pr_info("%s: Link is %s", phydev->dev.bus_id,
+	pr_info("PHY: %s - Link is %s", phydev->dev.bus_id,
 			phydev->link ? "Up" : "Down");
 	if (phydev->link)
 		printk(" - %d/%s", phydev->speed,

include/linux/phy.h

@@ -53,6 +53,9 @@
 
 #define PHY_MAX_ADDR 32
 
+/* Used when trying to connect to a specific phy (mii bus id:phy device id) */
+#define PHY_ID_FMT "%x:%02x"
+
 /* The Bus class for PHYs.  Devices which provide access to
  * PHYs should register using this structure */
 struct mii_bus {