[NET]: Fix ifenslave to not fail on lack of IP information

Patch to ifenslave so that under older ABI versions, a failure to propogate ip
information from master to slave does not result in a filure to enslave the
slave device.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/ifenslave.c

@@ -693,13 +693,7 @@ static int enslave(char *master_ifname, char *slave_ifname)
 		/* Older bonding versions would panic if the slave has no IP
 		 * address, so get the IP setting from the master.
 		 */
-		res = set_if_addr(master_ifname, slave_ifname);
-		if (res) {
-			fprintf(stderr,
-				"Slave '%s': Error: set address failed\n",
-				slave_ifname);
-			return res;
-		}
+		set_if_addr(master_ifname, slave_ifname);
 	} else {
 		res = clear_if_addr(slave_ifname);
 		if (res) {
@@ -1085,7 +1079,6 @@ static int set_if_addr(char *master_ifname, char *slave_ifname)
 				slave_ifname, ifra[i].req_name,
 				strerror(saved_errno));
 
-			return res;
 		}
 
 		ipaddr = ifr.ifr_addr.sa_data;