Bluetooth: A2MP: Handling fixed channels

A2MP fixed channel do not have sk

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

3 files changed, 19 insertions, 2 deletions

diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index aaba222306b6..a00b43ecbc77 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -581,6 +581,7 @@ struct l2cap_conn {
 #define L2CAP_CHAN_RAW                  1
 #define L2CAP_CHAN_CONN_LESS            2
 #define L2CAP_CHAN_CONN_ORIENTED        3
+#define L2CAP_CHAN_CONN_FIX_A2MP        4
 
 /* ----- L2CAP socket info ----- */
 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
index 6a933dab1b7f..f1ec1b1d308f 100644
--- a/net/bluetooth/a2mp.c
+++ b/net/bluetooth/a2mp.c
@@ -483,8 +483,7 @@ static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn)
 
         hci_conn_hold(conn->hcon);
 
-        chan->omtu = L2CAP_A2MP_DEFAULT_MTU;
-        chan->imtu = L2CAP_A2MP_DEFAULT_MTU;
+        chan->chan_type = L2CAP_CHAN_CONN_FIX_A2MP;
         chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
 
         chan->ops = &a2mp_chan_ops;
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 2c616cf24c71..fc572795497a 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -465,6 +465,13 @@ static void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan)
                 chan->omtu = L2CAP_DEFAULT_MTU;
                 break;
 
+        case L2CAP_CHAN_CONN_FIX_A2MP:
+                chan->scid = L2CAP_CID_A2MP;
+                chan->dcid = L2CAP_CID_A2MP;
+                chan->omtu = L2CAP_A2MP_DEFAULT_MTU;
+                chan->imtu = L2CAP_A2MP_DEFAULT_MTU;
+                break;
+
         default:
                 /* Raw socket can send/recv signalling messages only */
                 chan->scid = L2CAP_CID_SIGNALING;
@@ -1001,6 +1008,11 @@ static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct l2cap_chan *c
                 __clear_ack_timer(chan);
         }
 
+        if (chan->chan_type == L2CAP_CHAN_CONN_FIX_A2MP) {
+                __l2cap_state_change(chan, BT_DISCONN);
+                return;
+        }
+
         req.dcid = cpu_to_le16(chan->dcid);
         req.scid = cpu_to_le16(chan->scid);
         l2cap_send_cmd(conn, l2cap_get_ident(conn),
@@ -1195,6 +1207,11 @@ static void l2cap_conn_ready(struct l2cap_conn *conn)
 
                 l2cap_chan_lock(chan);
 
+                if (chan->chan_type == L2CAP_CHAN_CONN_FIX_A2MP) {
+                        l2cap_chan_unlock(chan);
+                        continue;
+                }
+
                 if (conn->hcon->type == LE_LINK) {
                         if (smp_conn_security(conn, chan->sec_level))
                                 l2cap_chan_ready(chan);