This patch reverses 
3f5af5b353ca36aca4f8a46e3da2172f669dbbbc as
a better fix was suggested by Patrick McHardy.
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
        for (i=0; i<IP_VS_APP_MAX_PORTS; i++) {
                if (!ports[i])
                        continue;
-               if (ports[i] < 0 || ports[i] > 0xffff) {
-                       IP_VS_WARNING("ip_vs_ftp: Ignoring invalid "
-                                     "configuration port[%d] = %d\n",
-                                     i, ports[i]);
-                       continue;
-               }
                ret = register_ip_vs_app_inc(app, app->protocol, ports[i]);
                if (ret)
                        break;