Bluetooth: Support case with F bit set under WAIT_F state.

On receipt of a F=1 under WAIT_F state ERTM shall stop monitor timer and
start retransmission timer (if there are unacked frames).

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 06687e2647034df6f0648238d3fe07a3a8936ad2..36cd4e4e6ad1923dd5082eb46073563dcd63afc8 100644 (file)
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -3364,6 +3364,13 @@ static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, str
 
        BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len);
 
+       if (L2CAP_CTRL_FINAL & rx_control) {
+               del_timer(&pi->monitor_timer);
+               if (pi->unacked_frames > 0)
+                       __mod_retrans_timer();
+               pi->conn_state &= ~L2CAP_CONN_WAIT_F;
+       }
+
        pi->expected_ack_seq = req_seq;
        l2cap_drop_acked_frames(sk);
 
@@ -3453,6 +3460,13 @@ static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, str
 
        BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len);
 
+       if (L2CAP_CTRL_FINAL & rx_control) {
+               del_timer(&pi->monitor_timer);
+               if (pi->unacked_frames > 0)
+                       __mod_retrans_timer();
+               pi->conn_state &= ~L2CAP_CONN_WAIT_F;
+       }
+
        switch (rx_control & L2CAP_CTRL_SUPERVISE) {
        case L2CAP_SUPER_RCV_READY:
                if (rx_control & L2CAP_CTRL_POLL) {
@@ -3472,14 +3486,6 @@ static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, str
                                l2cap_ertm_send(sk);
                        }
 
-                       if (!(pi->conn_state & L2CAP_CONN_WAIT_F))
-                               break;
-
-                       pi->conn_state &= ~L2CAP_CONN_WAIT_F;
-                       del_timer(&pi->monitor_timer);
-
-                       if (pi->unacked_frames > 0)
-                               __mod_retrans_timer();
                } else {
                        pi->expected_ack_seq = tx_seq;
                        l2cap_drop_acked_frames(sk);