net: introduce new priv_flag indicating iface capable of change mac when running

Introduce IFF_LIVE_ADDR_CHANGE priv_flag and use it to disable
netif_running() check in eth_mac_addr()

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/if.h b/include/linux/if.h
index f995c66..1ec407b 100644 (file)
--- a/include/linux/if.h
+++ b/include/linux/if.h
@@ -81,6 +81,8 @@
 #define IFF_UNICAST_FLT        0x20000         /* Supports unicast filtering   */
 #define IFF_TEAM_PORT  0x40000         /* device used as team port */
 #define IFF_SUPP_NOFCS 0x80000         /* device supports sending custom FCS */
+#define IFF_LIVE_ADDR_CHANGE 0x100000  /* device supports hardware address
+                                        * change when it's running */
 
 
 #define IF_GET_IFACE   0x0001          /* for querying only */

diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index 36e5880..db6a6c1 100644 (file)
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -283,7 +283,7 @@ int eth_mac_addr(struct net_device *dev, void *p)
 {
        struct sockaddr *addr = p;
 
-       if (netif_running(dev))
+       if (!(dev->priv_flags & IFF_LIVE_ADDR_CHANGE) && netif_running(dev))
                return -EBUSY;
        if (!is_valid_ether_addr(addr->sa_data))
                return -EADDRNOTAVAIL;