net: init perm_addr in register_netdevice()

Benefit from the fact that dev->addr_assign_type is set to NET_ADDR_PERM
in case the device has permanent address.

This also fixes the problem that many drivers do not set perm_addr at
all.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 2e2448201a76..594830e83589 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6004,6 +6004,13 @@ int register_netdevice(struct net_device *dev)
         list_netdevice(dev);
         add_device_randomness(dev->dev_addr, dev->addr_len);
 
+        /* If the device has permanent device address, driver should
+         * set dev_addr and also addr_assign_type should be set to
+         * NET_ADDR_PERM (default value).
+         */
+        if (dev->addr_assign_type == NET_ADDR_PERM)
+                memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
+
         /* Notify protocols, that a new device appeared. */
         ret = call_netdevice_notifiers(NETDEV_REGISTER, dev);
         ret = notifier_to_errno(ret);