Bluetooth: Remove usage of __cancel_delayed_work()

__cancel_delayed_work() is being used in some paths where we cannot
sleep waiting for the delayed work to finish. However, that function
might return while the timer is running and the work will be queued
again. Replace the calls with safer cancel_delayed_work() version
which spins until the timer handler finishes on other CPUs and
cancels the delayed work.

Signed-off-by: Ulisses Furquim <ulisses@profusion.mobi>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index e7a8cc7d07f4b285858aa40f06832305de620922..42fdbb833254a2f3084a41a8fb475220f542ea67 100644 (file)
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -614,7 +614,7 @@ static inline void l2cap_set_timer(struct l2cap_chan *chan,
 {
        BT_DBG("chan %p state %d timeout %ld", chan, chan->state, timeout);
 
-       if (!__cancel_delayed_work(work))
+       if (!cancel_delayed_work(work))
                l2cap_chan_hold(chan);
        schedule_delayed_work(work, timeout);
 }
@@ -624,7 +624,7 @@ static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
 {
        bool ret;
 
-       ret = __cancel_delayed_work(work);
+       ret = cancel_delayed_work(work);
        if (ret)
                l2cap_chan_put(chan);
 

diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 942ba1d1a38c88e3ab061ae698d477000f1b0b56..ae7fb27525d350aad2b6d55f8587c43449afa9ef 100644 (file)
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -2588,7 +2588,7 @@ static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hd
 
        if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) &&
                                        cmd->ident == conn->info_ident) {
-               __cancel_delayed_work(&conn->info_timer);
+               cancel_delayed_work(&conn->info_timer);
 
                conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
                conn->info_ident = 0;
@@ -3135,7 +3135,7 @@ static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cm
                        conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)
                return 0;
 
-       __cancel_delayed_work(&conn->info_timer);
+       cancel_delayed_work(&conn->info_timer);
 
        if (result != L2CAP_IR_SUCCESS) {
                conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
@@ -4509,7 +4509,7 @@ int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt)
 
        if (hcon->type == LE_LINK) {
                smp_distribute_keys(conn, 0);
-               __cancel_delayed_work(&conn->security_timer);
+               cancel_delayed_work(&conn->security_timer);
        }
 
        rcu_read_lock();