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Bluetooth: Remove socket lock from l2cap_state_change() 

This simplify and make safer the state change handling inside l2cap_core.c.
we got rid of __l2cap_state_change(). And l2cap_state_change() doesn't lock
the socket anymore, instead the socket is locked inside the ops callback for
state change in l2cap_sock.c.

It makes the code safer because in some we were using a unlocked version,
and now we are calls to l2cap_state_change(), when dealing with sockets, use
the locked version.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Gustavo Padovan 2013-10-21 14:21:40 -02:00 committed by Marcel Holtmann
parent acdcabf532
commit f93fa27323
1 changed files with 7 additions and 24 deletions
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31
net/bluetooth/l2cap_core.c
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@ -223,7 +223,7 @@ static u16 l2cap_alloc_cid(struct l2cap_conn *conn)
return 0;
}
static void __l2cap_state_change(struct l2cap_chan *chan, int state)
static void l2cap_state_change(struct l2cap_chan *chan, int state)
{
BT_DBG("chan %p %s -> %s", chan, state_to_string(chan->state),
state_to_string(state));
@ -232,33 +232,16 @@ static void __l2cap_state_change(struct l2cap_chan *chan, int state)
chan->ops->state_change(chan, state, 0);
}
static void l2cap_state_change(struct l2cap_chan *chan, int state)
{
struct sock *sk = chan->sk;
lock_sock(sk);
__l2cap_state_change(chan, state);
release_sock(sk);
}
static inline void l2cap_state_change_and_error(struct l2cap_chan *chan,
int state, int err)
{
struct sock *sk = chan->sk;
lock_sock(sk);
chan->state = state;
chan->ops->state_change(chan, chan->state, err);
release_sock(sk);
}
static inline void l2cap_chan_set_err(struct l2cap_chan *chan, int err)
{
struct sock *sk = chan->sk;
lock_sock(sk);
chan->ops->state_change(chan, chan->state, err);
release_sock(sk);
}
static void __set_retrans_timer(struct l2cap_chan *chan)
@ -3787,7 +3770,7 @@ static struct l2cap_chan *l2cap_connect(struct l2cap_conn *conn,
if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) {
if (l2cap_chan_check_security(chan)) {
if (test_bit(FLAG_DEFER_SETUP, &chan->flags)) {
__l2cap_state_change(chan, BT_CONNECT2);
l2cap_state_change(chan, BT_CONNECT2);
result = L2CAP_CR_PEND;
status = L2CAP_CS_AUTHOR_PEND;
chan->ops->defer(chan);
@ -3797,21 +3780,21 @@ static struct l2cap_chan *l2cap_connect(struct l2cap_conn *conn,
* physical link is up.
*/
if (amp_id == AMP_ID_BREDR) {
__l2cap_state_change(chan, BT_CONFIG);
l2cap_state_change(chan, BT_CONFIG);
result = L2CAP_CR_SUCCESS;
} else {
__l2cap_state_change(chan, BT_CONNECT2);
l2cap_state_change(chan, BT_CONNECT2);
result = L2CAP_CR_PEND;
}
status = L2CAP_CS_NO_INFO;
}
} else {
__l2cap_state_change(chan, BT_CONNECT2);
l2cap_state_change(chan, BT_CONNECT2);
result = L2CAP_CR_PEND;
status = L2CAP_CS_AUTHEN_PEND;
}
} else {
__l2cap_state_change(chan, BT_CONNECT2);
l2cap_state_change(chan, BT_CONNECT2);
result = L2CAP_CR_PEND;
status = L2CAP_CS_NO_INFO;
}
@ -4738,7 +4721,7 @@ static void l2cap_do_create(struct l2cap_chan *chan, int result,
sizeof(rsp), &rsp);
if (result == L2CAP_CR_SUCCESS) {
__l2cap_state_change(chan, BT_CONFIG);
l2cap_state_change(chan, BT_CONFIG);
set_bit(CONF_REQ_SENT, &chan->conf_state);
l2cap_send_cmd(chan->conn, l2cap_get_ident(chan->conn),
L2CAP_CONF_REQ,