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Bluetooth: Add wait_queue to wait ack of all sent packets 

To guarantee that all packets we sent were received we need to wait for
theirs ack before shutdown the socket.

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>
This commit is contained in:
Gustavo F. Padovan 2010-05-01 16:15:44 -03:00 committed by Marcel Holtmann
parent 1890d36bb5
commit 6161c0382b
1 changed files with 34 additions and 0 deletions
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34
net/bluetooth/l2cap.c
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@ -1242,6 +1242,37 @@ static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *l
return 0;
}
static int __l2cap_wait_ack(struct sock *sk)
{
DECLARE_WAITQUEUE(wait, current);
int err = 0;
int timeo = HZ/5;
add_wait_queue(sk->sk_sleep, &wait);
while ((l2cap_pi(sk)->unacked_frames > 0 && l2cap_pi(sk)->conn)) {
set_current_state(TASK_INTERRUPTIBLE);
if (!timeo)
timeo = HZ/5;
if (signal_pending(current)) {
err = sock_intr_errno(timeo);
break;
}
release_sock(sk);
timeo = schedule_timeout(timeo);
lock_sock(sk);
err = sock_error(sk);
if (err)
break;
}
set_current_state(TASK_RUNNING);
remove_wait_queue(sk->sk_sleep, &wait);
return err;
}
static void l2cap_monitor_timeout(unsigned long arg)
{
struct sock *sk = (void *) arg;
@ -2059,6 +2090,9 @@ static int l2cap_sock_shutdown(struct socket *sock, int how)
lock_sock(sk);
if (!sk->sk_shutdown) {
if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM)
err = __l2cap_wait_ack(sk);
sk->sk_shutdown = SHUTDOWN_MASK;
l2cap_sock_clear_timer(sk);
__l2cap_sock_close(sk, 0);