teamd: lw: nsna_ping: only send ns on enabled port

We forget to check forced_send when using nsna_ping link_watch.
Ns is sent from all ports, which cause switch mac flapping. Some
reply packets are delivered to disabled port and dropped directly.

Fix it by checking forced_send and only send ns on enabled port.

Reported-by: LiLiang <liali@redhat.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>

teamd/teamd_lw_nsna_ping.c

@@ -203,6 +203,9 @@ static int lw_nsnap_send(struct lw_psr_port_priv *psr_ppriv)
 	struct sockaddr_in6 sendto_addr;
 	struct ns_packet nsp;
 
+	if (!(psr_ppriv->common.forced_send))
+		return 0;
+
 	err = teamd_getsockname_hwaddr(psr_ppriv->sock, &ll_my,
 				       sizeof(nsp.hwaddr));
 	if (err)