Bluetooth: Add LE connection support to L2CAP

Add basic LE connection support to L2CAP. LE
connection can be created by specifying cid
in struct sockaddr_l2

Signed-off-by: Ville Tervo <ville.tervo@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index a72d6e4..123c1bf 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -593,6 +593,12 @@
 	for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
 		bh_lock_sock(sk);
 
+		if (conn->hcon->type == LE_LINK) {
+			l2cap_sock_clear_timer(sk);
+			sk->sk_state = BT_CONNECTED;
+			sk->sk_state_change(sk);
+		}
+
 		if (sk->sk_type != SOCK_SEQPACKET &&
 				sk->sk_type != SOCK_STREAM) {
 			l2cap_sock_clear_timer(sk);
@@ -651,7 +657,11 @@
 
 	BT_DBG("hcon %p conn %p", hcon, conn);
 
-	conn->mtu = hcon->hdev->acl_mtu;
+	if (hcon->hdev->le_mtu && hcon->type == LE_LINK)
+		conn->mtu = hcon->hdev->le_mtu;
+	else
+		conn->mtu = hcon->hdev->acl_mtu;
+
 	conn->src = &hcon->hdev->bdaddr;
 	conn->dst = &hcon->dst;
 
@@ -758,8 +768,13 @@
 
 	auth_type = l2cap_get_auth_type(sk);
 
-	hcon = hci_connect(hdev, ACL_LINK, dst,
+	if (l2cap_pi(sk)->dcid == L2CAP_CID_LE_DATA)
+		hcon = hci_connect(hdev, LE_LINK, dst,
 					l2cap_pi(sk)->sec_level, auth_type);
+	else
+		hcon = hci_connect(hdev, ACL_LINK, dst,
+					l2cap_pi(sk)->sec_level, auth_type);
+
 	if (!hcon)
 		goto done;
 
@@ -3520,7 +3535,7 @@
 
 	BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
 
-	if (hcon->type != ACL_LINK)
+	if (!(hcon->type == ACL_LINK || hcon->type == LE_LINK))
 		return -EINVAL;
 
 	if (!status) {
@@ -3549,7 +3564,7 @@
 {
 	BT_DBG("hcon %p reason %d", hcon, reason);
 
-	if (hcon->type != ACL_LINK)
+	if (!(hcon->type == ACL_LINK || hcon->type == LE_LINK))
 		return -EINVAL;
 
 	l2cap_conn_del(hcon, bt_err(reason));