openwrt-xburst/target/linux/pxa/patches-2.6.21/012-serial-ether-addr.patch

--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -2249,6 +2249,38 @@ static u8 __devinit nibble (unsigned cha
 	return 0;
 }
 
+static inline unsigned int is_gumstix_oui(u8 *addr)
+{
+	return (addr[0] == 0x00 && addr[1] == 0x15 && addr[2] == 0xC9);
+}
+
+/**
+ * gen_serial_ether_addr - Generate software assigned Ethernet address
+ * based on the system_serial number
+ * @addr: Pointer to a six-byte array containing the Ethernet address
+ *
+ * Generate an Ethernet address (MAC) that is not multicast
+ * and has the local assigned bit set, keyed on the system_serial
+ */
+static inline void gen_serial_ether_addr(u8 *addr)
+{
+	static u8 ether_serial_digit = 0;
+	addr [0] = system_serial_high >> 8;
+	addr [1] = system_serial_high;
+	addr [2] = system_serial_low >> 24;
+	addr [3] = system_serial_low >> 16;
+	addr [4] = system_serial_low >> 8;
+	addr [5] = (system_serial_low & 0xc0) |	/* top bits are from system serial */
+		(2 << 4) |			/* 2 bits identify interface type 1=ether, 2=usb, 3&4 undef */
+		((ether_serial_digit++) & 0x0f);	/* 15 possible interfaces of each type */
+
+	if(!is_gumstix_oui(addr))
+	{
+		addr [0] &= 0xfe;		/* clear multicast bit */
+		addr [0] |= 0x02;		/* set local assignment bit (IEEE802) */
+	}
+}
+
 static int __devinit get_ether_addr(const char *str, u8 *dev_addr)
 {
 	if (str) {
@@ -2266,8 +2298,16 @@ static int __devinit get_ether_addr(cons
 		if (is_valid_ether_addr (dev_addr))
 			return 0;
 	}
-	random_ether_addr(dev_addr);
-	return 1;
+	if(system_serial_high | system_serial_low)
+	{
+		gen_serial_ether_addr(dev_addr);
+		return 0;
+	}
+	else
+	{
+		random_ether_addr(dev_addr);
+		return 1;
+	}
 }
 
 static int __devinit