From: Stephen Hemminger <shemminger@linux-foundation.org>
Date: Mon, 9 Apr 2007 18:49:58 +0000 (-0700)
Subject: bridge: allow changing hardware address to any valid address
X-Git-Tag: v2.6.22-rc1~1128^2~124
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ffe1d49cc300f3dff990093aa952a2fbb371c1b6;p=linux-2.6

bridge: allow changing hardware address to any valid address

For case of bridging pseudo devices, the get created/destroyed (Xen)
need to allow setting address to any valid value.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
---

diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index b22ada529c..39b87dad35 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -83,27 +83,22 @@ static int br_change_mtu(struct net_device *dev, int new_mtu)
 	return 0;
 }
 
-/* Allow setting mac address of pseudo-bridge to be same as
- * any of the bound interfaces
- */
+/* Allow setting mac address to any valid ethernet address. */
 static int br_set_mac_address(struct net_device *dev, void *p)
 {
 	struct net_bridge *br = netdev_priv(dev);
 	struct sockaddr *addr = p;
 	struct net_bridge_port *port;
-	int err = -EADDRNOTAVAIL;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EINVAL;
 
 	spin_lock_bh(&br->lock);
-	list_for_each_entry(port, &br->port_list, list) {
-		if (!compare_ether_addr(port->dev->dev_addr, addr->sa_data)) {
-			br_stp_change_bridge_id(br, addr->sa_data);
-			err = 0;
-			break;
-		}
-	}
+	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
+	br_stp_change_bridge_id(br, addr->sa_data);
 	spin_unlock_bh(&br->lock);
 
-	return err;
+	return 0;
 }
 
 static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)