diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2011-07-24 00:10:41 -0400 |
|---|---|---|
| committer | Jonas ABERG <jonas.aberg@stericsson.com> | 2011-10-28 11:00:59 +0200 |
| commit | fe7b48f13e8d0619fa41dba4725bb2e717cb5cc0 (patch) | |
| tree | e75d1b2eeeacf93e98ff84ef748d3a57df83175d | |
| parent | 49220938cf9139dc78181d558180e81cd7ec4f90 (diff) | |
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>
Change-Id: Iafe477372e4dcf4a4519cc79ff61bc457c3d8642
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/35564
Tested-by: Per VAHLNE <per.xx.vahlne@stericsson.com>
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
| -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 7b3638b4043..b02f0d47ab8 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) |