Bluetooth: Acknowledge L2CAP packets when receiving RR-frames (F-bit=1)

Implement the Recv ReqSeqAndFBit event when a RR frame with F bit set is
received.

Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index e5847c5849d7..0a36c61c011f 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -3348,9 +3348,13 @@ static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, str
         case L2CAP_SUPER_RCV_READY:
                 if (rx_control & L2CAP_CTRL_POLL) {
                         u16 control = L2CAP_CTRL_FINAL;
-                        control |= L2CAP_SUPER_RCV_READY;
+                        control |= L2CAP_SUPER_RCV_READY |
+                                (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT);
                         l2cap_send_sframe(l2cap_pi(sk), control);
                 } else if (rx_control & L2CAP_CTRL_FINAL) {
+                        pi->expected_ack_seq = tx_seq;
+                        l2cap_drop_acked_frames(sk);
+
                         if (!(pi->conn_state & L2CAP_CONN_WAIT_F))
                                 break;