net/ncsi: handle overflow when incrementing mac address

[linux-2.6-microblaze.git] / include / linux / etherdevice.h

diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index e2f3b21..aa8bfd6 100644 (file)
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -448,6 +448,18 @@ static inline void eth_addr_dec(u8 *addr)
        u64_to_ether_addr(u, addr);
 }
 
+/**
+ * eth_addr_inc() - Increment the given MAC address.
+ * @addr: Pointer to a six-byte array containing Ethernet address to increment.
+ */
+static inline void eth_addr_inc(u8 *addr)
+{
+       u64 u = ether_addr_to_u64(addr);
+
+       u++;
+       u64_to_ether_addr(u, addr);
+}
+
 /**
  * is_etherdev_addr - Tell if given Ethernet address belongs to the device.
  * @dev: Pointer to a device structure