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Bluetooth: Unwind l2cap_sock_shutdown()

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l2cap_sock_shutdown() is designed to only action shutdown
of the channel when shutdown is not already in progress.
Therefore, reorganise the code flow by adding a goto
to jump to the end of function handling when shutdown is
already being actioned. This removes one level of code
indentation and make the code more readable.

Signed-off-by: Dean Jenkins <Dean_Jenkins@mentor.com>
Signed-off-by: Harish Jenny K N <harish_kandiga@mentor.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Dean Jenkins 2015-10-14 12:18:45 +02:00 committed by Marcel Holtmann
parent 09bf420f10
commit e7456437c1
1 changed files with 18 additions and 14 deletions
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32
net/bluetooth/l2cap_sock.c
View file

@ -1111,6 +1111,11 @@ static int l2cap_sock_shutdown(struct socket *sock, int how)
if (!sk)
return 0;
if (sk->sk_shutdown)
goto shutdown_already;
BT_DBG("Handling sock shutdown");
/* prevent sk structure from being freed whilst unlocked */
sock_hold(sk);
@ -1127,23 +1132,21 @@ static int l2cap_sock_shutdown(struct socket *sock, int how)
l2cap_chan_lock(chan);
lock_sock(sk);
if (!sk->sk_shutdown) {
if (chan->mode == L2CAP_MODE_ERTM &&
chan->unacked_frames > 0 &&
chan->state == BT_CONNECTED)
err = __l2cap_wait_ack(sk, chan);
if (chan->mode == L2CAP_MODE_ERTM &&
chan->unacked_frames > 0 &&
chan->state == BT_CONNECTED)
err = __l2cap_wait_ack(sk, chan);
sk->sk_shutdown = SHUTDOWN_MASK;
sk->sk_shutdown = SHUTDOWN_MASK;
release_sock(sk);
l2cap_chan_close(chan, 0);
lock_sock(sk);
release_sock(sk);
l2cap_chan_close(chan, 0);
lock_sock(sk);
if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
!(current->flags & PF_EXITING))
err = bt_sock_wait_state(sk, BT_CLOSED,
sk->sk_lingertime);
}
if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
!(current->flags & PF_EXITING))
err = bt_sock_wait_state(sk, BT_CLOSED,
sk->sk_lingertime);
if (!err && sk->sk_err)
err = -sk->sk_err;
@ -1157,6 +1160,7 @@ static int l2cap_sock_shutdown(struct socket *sock, int how)
l2cap_chan_put(chan);
sock_put(sk);
shutdown_already:
BT_DBG("err: %d", err);
return err;