diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2011-07-24 06:10:41 +0200 |
|---|---|---|
| committer | Gustavo F. Padovan <padovan@profusion.mobi> | 2011-08-12 00:50:26 +0200 |
| commit | 950e2d51e866623e4c360280aa63b85ab66d3403 (patch) | |
| tree | 7852a1ed5415b0e4e2ba328249658edfca2ee0af | |
| parent | Bluetooth: rfcomm: Remove unnecessary krfcommd event (diff) | |
| download | linux-950e2d51e866623e4c360280aa63b85ab66d3403.tar.xz linux-950e2d51e866623e4c360280aa63b85ab66d3403.zip | |
Bluetooth: rfcomm: Fix lost wakeups waiting to accept socket
Fix race conditions which can cause lost wakeups (or missed
signals) while waiting to accept an rfcomm socket connection.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
| -rw-r--r-- | net/bluetooth/rfcomm/sock.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index 8f01e6b11a70..482722bbc7a0 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -485,11 +485,6 @@ static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int f lock_sock(sk); - if (sk->sk_state != BT_LISTEN) { - err = -EBADFD; - goto done; - } - if (sk->sk_type != SOCK_STREAM) { err = -EINVAL; goto done; @@ -501,19 +496,20 @@ static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int f /* Wait for an incoming connection. (wake-one). */ add_wait_queue_exclusive(sk_sleep(sk), &wait); - while (!(nsk = bt_accept_dequeue(sk, newsock))) { + while (1) { set_current_state(TASK_INTERRUPTIBLE); - if (!timeo) { - err = -EAGAIN; + + if (sk->sk_state != BT_LISTEN) { + err = -EBADFD; break; } - release_sock(sk); - timeo = schedule_timeout(timeo); - lock_sock(sk); + nsk = bt_accept_dequeue(sk, newsock); + if (nsk) + break; - if (sk->sk_state != BT_LISTEN) { - err = -EBADFD; + if (!timeo) { + err = -EAGAIN; break; } @@ -521,8 +517,12 @@ static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int f err = sock_intr_errno(timeo); break; } + + release_sock(sk); + timeo = schedule_timeout(timeo); + lock_sock(sk); } - set_current_state(TASK_RUNNING); + __set_current_state(TASK_RUNNING); remove_wait_queue(sk_sleep(sk), &wait); if (err) |