dlm: make tcp still work in multi-link env

This patch bypasses multi-link errors in TCP mode, allowing dlm
to operate on the first tcp link.

Signed-off-by: Heming Zhao <[email protected]>
Signed-off-by: David Teigland <[email protected]>

Author: zhaohem

fs/dlm/lowcomms.c

@@ -1826,8 +1826,8 @@ static int dlm_tcp_listen_validate(void)
 {
 	/* We don't support multi-homed hosts */
 	if (dlm_local_count > 1) {
-		log_print("TCP protocol can't handle multi-homed hosts, try SCTP");
-		return -EINVAL;
+		log_print("Detect multi-homed hosts but use only the first IP address.");
+		log_print("Try SCTP, if you want to enable multi-link.");
 	}
 
 	return 0;