Bluetooth: Stop ack_timer if ERTM enters in Local Busy or SREJ_SENT

The ack_timer is implemation specific, disabling it in such situation
avoids some potencial errors in the ERTM protocol.

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 c2fb26d..40cf67c 100644 (file)
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -3665,6 +3665,8 @@ static int l2cap_push_rx_skb(struct sock *sk, struct sk_buff *skb, u16 control)
 
        pi->conn_state |= L2CAP_CONN_RNR_SENT;
 
+       del_timer(&pi->ack_timer);
+
        queue_work(_busy_wq, &pi->busy_work);
 
        return err;
@@ -3914,6 +3916,8 @@ static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, str
                pi->conn_state |= L2CAP_CONN_SEND_PBIT;
 
                l2cap_send_srejframe(sk, tx_seq);
+
+               del_timer(&pi->ack_timer);
        }
        return 0;