[8021Q]: transfer dev_id from real device

A net_device struct provides field dev_id. It is used for
unique ipv6 generation in case of shared network cards
(as for the OSA network cards of IBM System z).
If VLAN devices are built on top of such shared network cards,
this dev_id information needs to be transferred to the VLAN device.

Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index f2bee234d361..3fe4fc86055f 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -331,6 +331,9 @@ static int vlan_dev_init(struct net_device *dev)
                                           (1<<__LINK_STATE_DORMANT))) |
                       (1<<__LINK_STATE_PRESENT);
 
+        /* ipv6 shared card related stuff */
+        dev->dev_id = real_dev->dev_id;
+
         if (is_zero_ether_addr(dev->dev_addr))
                 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
         if (is_zero_ether_addr(dev->broadcast))