sctp: remove redundant assignment when call sctp_get_port_local

There are more parentheses in if clause when call sctp_get_port_local
in sctp_do_bind, and redundant assignment to 'ret'. This patch is to
do cleanup.

Signed-off-by: Mao Wenan <[email protected]>
Acked-by: Neil Horman <[email protected]>
Acked-by: Marcelo Ricardo Leitner <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Mao Wenan

net/sctp/socket.c

@@ -399,9 +399,8 @@ static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len)
 	 * detection.
 	 */
 	addr->v4.sin_port = htons(snum);
-	if ((ret = sctp_get_port_local(sk, addr))) {
+	if (sctp_get_port_local(sk, addr))
 		return -EADDRINUSE;
-	}
 
 	/* Refresh ephemeral port.  */
 	if (!bp->port)