Bluetooth: rfcomm: Remove unnecessary krfcommd event

Removed superfluous event handling which was used to signal
that the rfcomm kthread had been woken. This appears to have been
used to prevent lost wakeups. Correctly ordering when the task
state is set to TASK_INTERRUPTIBLE is sufficient to prevent lost wakeups.

To prevent wakeups which occurred prior to initially setting
TASK_INTERRUPTIBLE from being lost, the main work of the thread loop -
rfcomm_process_sessions() - is performed prior to sleeping.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index 6bbd3172c029d53b51c29c624612956cd2633b02..38b618c96de64a13a1d724a954352cec27264fae 100644 (file)
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -62,7 +62,6 @@ static DEFINE_MUTEX(rfcomm_mutex);
 #define rfcomm_lock()  mutex_lock(&rfcomm_mutex)
 #define rfcomm_unlock()        mutex_unlock(&rfcomm_mutex)
 
-static unsigned long rfcomm_event;
 
 static LIST_HEAD(session_list);
 
@@ -120,7 +119,6 @@ static inline void rfcomm_schedule(void)
 {
        if (!rfcomm_thread)
                return;
-       set_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event);
        wake_up_process(rfcomm_thread);
 }
 
@@ -2041,19 +2039,18 @@ static int rfcomm_run(void *unused)
 
        rfcomm_add_listener(BDADDR_ANY);
 
-       while (!kthread_should_stop()) {
+       while (1) {
                set_current_state(TASK_INTERRUPTIBLE);
-               if (!test_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event)) {
-                       /* No pending events. Let's sleep.
-                        * Incoming connections and data will wake us up. */
-                       schedule();
-               }
-               set_current_state(TASK_RUNNING);
+
+               if (kthread_should_stop())
+                       break;
 
                /* Process stuff */
-               clear_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event);
                rfcomm_process_sessions();
+
+               schedule();
        }
+       __set_current_state(TASK_RUNNING);
 
        rfcomm_kill_listener();