Bluetooth: Do not retransmit data during a channel move

Do not retransmit previously-sent data when a "receiver ready" s-frame
with the "final" flag is received during a move.

The ERTM state machines will resynchronize at the end of a channel
move, and the state machine needs to avoid state changes during a
move.

Signed-off-by: Mat Martineau <mathewm@codeaurora.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index ef86ebb..93f1ebb 100644 (file)
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -5591,8 +5591,8 @@ static int l2cap_rx_state_recv(struct l2cap_chan *chan,
                if (control->final) {
                        clear_bit(CONN_REMOTE_BUSY, &chan->conn_state);
 
-                       if (!test_and_clear_bit(CONN_REJ_ACT,
-                                               &chan->conn_state)) {
+                       if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state) &&
+                           !__chan_is_moving(chan)) {
                                control->final = 0;
                                l2cap_retransmit_all(chan, control);
                        }