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authorDean Jenkins <Dean_Jenkins@mentor.com>2015-10-14 12:18:45 +0200
committerMarcel Holtmann <marcel@holtmann.org>2015-10-21 00:49:26 +0200
commite7456437c15a2fd42cedd25c2b12b06876f285f0 (patch)
tree87c6a143827fc5c107464ae2366af8ba42af095a /net/bluetooth
parent09bf420f101c9d35ca0b5f539c7f03951fd2e24d (diff)
Bluetooth: Unwind l2cap_sock_shutdown()
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>
Diffstat (limited to 'net/bluetooth')
-rw-r--r--net/bluetooth/l2cap_sock.c32
1 files changed, 18 insertions, 14 deletions
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 586b3d580cfc..ca5598d6a201 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -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;