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Bluetooth: Fix lost wakeups waiting for sock state change

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Fix race conditions which can cause lost wakeups while waiting
for sock state to change.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Peter Hurley 2011-07-24 00:10:46 -04:00 committed by Gustavo F. Padovan
parent 950e2d51e8
commit 9be4e3fbf2
1 changed files with 3 additions and 3 deletions
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6
net/bluetooth/af_bluetooth.c
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@ -494,9 +494,8 @@ int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
BT_DBG("sk %p", sk);
add_wait_queue(sk_sleep(sk), &wait);
set_current_state(TASK_INTERRUPTIBLE);
while (sk->sk_state != state) {
set_current_state(TASK_INTERRUPTIBLE);
if (!timeo) {
err = -EINPROGRESS;
break;
@ -510,12 +509,13 @@ int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
release_sock(sk);
timeo = schedule_timeout(timeo);
lock_sock(sk);
set_current_state(TASK_INTERRUPTIBLE);
err = sock_error(sk);
if (err)
break;
}
set_current_state(TASK_RUNNING);
__set_current_state(TASK_RUNNING);
remove_wait_queue(sk_sleep(sk), &wait);
return err;
}