Index: target/linux/atheros/files/drivers/net/ar2313/ar2313.c
===================================================================
--- target/linux/atheros/files/drivers/net/ar2313/ar2313.c	(revision 10814)
+++ target/linux/atheros/files/drivers/net/ar2313/ar2313.c	(working copy)
@@ -292,7 +292,7 @@
 	sp->mii_bus.write = mdiobus_write;
 	sp->mii_bus.reset = mdiobus_reset;
 	sp->mii_bus.name = "ar2313_eth_mii";
-	sp->mii_bus.id = 0;
+	sp->mii_bus.id = (pdev->id < 0) ? 0 : pdev->id;
 	sp->mii_bus.irq = kmalloc(sizeof(int), GFP_KERNEL);
 	*sp->mii_bus.irq = PHY_POLL;