Bluetooth: Fix drop of acked packets on ERTM

l2cap_drop_acked_frames() was droping not sent packets, causing them to
be not transmitted.

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>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 2f9bbad42887..042fd967e79c 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -1262,7 +1262,8 @@ static void l2cap_drop_acked_frames(struct sock *sk)
 {
         struct sk_buff *skb;
 
-        while ((skb = skb_peek(TX_QUEUE(sk)))) {
+        while ((skb = skb_peek(TX_QUEUE(sk))) &&
+                        l2cap_pi(sk)->unacked_frames) {
                 if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq)
                         break;