Bluetooth: move l2cap_sock_shutdown() to l2cap_sock.c

Declare __l2cap_wait_ack() and  l2cap_sock_clear_timer() in l2cap.h

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index fa2bc5d..93af233 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -723,6 +723,37 @@
 	return bt_sock_recvmsg(iocb, sock, msg, len, flags);
 }
 
+static int l2cap_sock_shutdown(struct socket *sock, int how)
+{
+	struct sock *sk = sock->sk;
+	int err = 0;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	lock_sock(sk);
+	if (!sk->sk_shutdown) {
+		if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM)
+			err = __l2cap_wait_ack(sk);
+
+		sk->sk_shutdown = SHUTDOWN_MASK;
+		l2cap_sock_clear_timer(sk);
+		__l2cap_sock_close(sk, 0);
+
+		if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
+			err = bt_sock_wait_state(sk, BT_CLOSED,
+							sk->sk_lingertime);
+	}
+
+	if (!err && sk->sk_err)
+		err = -sk->sk_err;
+
+	release_sock(sk);
+	return err;
+}
+
 static int l2cap_sock_release(struct socket *sock)
 {
 	struct sock *sk = sock->sk;