tipc: remove tsk->connected for connectionless sockets

Until now, for connectionless sockets the peer information during
connect is stored in tsk->peer and a connection state is set in
tsk->connected. This is redundant.

In this commit, for connectionless sockets we update:
- __tipc_sendmsg(), when the destination is NULL the peer existence
  is determined by tsk->peer.family, instead of tsk->connected.
- tipc_connect(), remove set/unset of tsk->connected.
Hence tsk->connected is no longer used for connectionless sockets.

There is no functional change in this commit.

Acked-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/tipc/socket.c

@@ -902,7 +902,7 @@ static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz)
 	if (dsz > TIPC_MAX_USER_MSG_SIZE)
 		return -EMSGSIZE;
 	if (unlikely(!dest)) {
-		if (tsk->connected && sock->state == SS_READY)
+		if (sock->state == SS_READY && tsk->peer.family == AF_TIPC)
 			dest = &tsk->peer;
 		else
 			return -EDESTADDRREQ;
@@ -1939,12 +1939,10 @@ static int tipc_connect(struct socket *sock, struct sockaddr *dest,
 	if (sock->state == SS_READY) {
 		if (dst->family == AF_UNSPEC) {
 			memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc));
-			tsk->connected = 0;
 		} else if (destlen != sizeof(struct sockaddr_tipc)) {
 			res = -EINVAL;
 		} else {
 			memcpy(&tsk->peer, dest, destlen);
-			tsk->connected = 1;
 		}
 		goto exit;
 	}