Bluetooth: Add timer to Acknowledge I-frames
We ack I-frames on each txWindow/5 I-frames received, but if the sender
stop to send I-frames and it's not a txWindow multiple we can leave some
frames unacked.
So I added a timer to ack I-frames on this case. The timer expires in
200ms.
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 f386985..0300656 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -2235,6 +2235,15 @@
*ptr += L2CAP_CONF_OPT_SIZE + len;
}
+static void l2cap_ack_timeout(unsigned long arg)
+{
+ struct sock *sk = (void *) arg;
+
+ bh_lock_sock(sk);
+ l2cap_send_ack(l2cap_pi(sk));
+ bh_unlock_sock(sk);
+}
+
static inline void l2cap_ertm_init(struct sock *sk)
{
l2cap_pi(sk)->expected_ack_seq = 0;
@@ -2247,6 +2256,8 @@
l2cap_retrans_timeout, (unsigned long) sk);
setup_timer(&l2cap_pi(sk)->monitor_timer,
l2cap_monitor_timeout, (unsigned long) sk);
+ setup_timer(&l2cap_pi(sk)->ack_timer,
+ l2cap_ack_timeout, (unsigned long) sk);
__skb_queue_head_init(SREJ_QUEUE(sk));
}
@@ -2975,6 +2986,7 @@
skb_queue_purge(SREJ_QUEUE(sk));
del_timer(&l2cap_pi(sk)->retrans_timer);
del_timer(&l2cap_pi(sk)->monitor_timer);
+ del_timer(&l2cap_pi(sk)->ack_timer);
}
l2cap_chan_del(sk, ECONNRESET);
@@ -3005,6 +3017,7 @@
skb_queue_purge(SREJ_QUEUE(sk));
del_timer(&l2cap_pi(sk)->retrans_timer);
del_timer(&l2cap_pi(sk)->monitor_timer);
+ del_timer(&l2cap_pi(sk)->ack_timer);
}
l2cap_chan_del(sk, 0);
@@ -3484,6 +3497,8 @@
if (err < 0)
return err;
+ __mod_ack_timer();
+
pi->num_to_ack = (pi->num_to_ack + 1) % L2CAP_DEFAULT_NUM_TO_ACK;
if (pi->num_to_ack == L2CAP_DEFAULT_NUM_TO_ACK - 1)
l2cap_send_ack(pi);
