Bluetooth: Refactor L2CAP channel allocation

If the allocation happens at l2cap_sock_create() will be able to use the
struct l2cap_chan to store channel info that comes from the user via
setsockopt.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 473e597..e372457 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -229,7 +229,7 @@
 	l2cap_pi(sk)->psm = la.l2_psm;
 	l2cap_pi(sk)->dcid = la.l2_cid;
 
-	err = l2cap_do_connect(sk);
+	err = l2cap_do_connect(l2cap_pi(sk)->chan);
 	if (err)
 		goto done;
 
@@ -1054,6 +1054,7 @@
 			     int kern)
 {
 	struct sock *sk;
+	struct l2cap_chan *chan;
 
 	BT_DBG("sock %p", sock);
 
@@ -1072,6 +1073,14 @@
 	if (!sk)
 		return -ENOMEM;
 
+	chan = l2cap_chan_alloc(sk);
+	if (!chan) {
+		l2cap_sock_kill(sk);
+		return -ENOMEM;
+	}
+
+	l2cap_pi(sk)->chan = chan;
+
 	l2cap_sock_init(sk, NULL);
 	return 0;
 }