add timer fix by mmp from http://forum.openwrt.org/viewtopic.php?id=14841

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10750 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/broadcom-wl/patches/100-timer_fix.patch b/package/broadcom-wl/patches/100-timer_fix.patch
new file mode 100644 (file)
index 0000000..c3d9f63
--- /dev/null
+++ b/package/broadcom-wl/patches/100-timer_fix.patch
@@ -0,0 +1,53 @@
+Index: broadcom-wl-4.150.10.5.2/router/shared/linux_timer.c
+===================================================================
+--- broadcom-wl-4.150.10.5.2.orig/router/shared/linux_timer.c  2008-04-07 00:15:24.914329846 +0200
++++ broadcom-wl-4.150.10.5.2/router/shared/linux_timer.c       2008-04-07 00:14:52.288470602 +0200
+@@ -94,6 +94,7 @@
+ #define TFLAG_NONE    0
+ #define TFLAG_CANCELLED       (1<<0)
+ #define TFLAG_DELETED (1<<1)
++#define TFLAG_QUEUED  (1<<2)
+ 
+ struct event {
+     struct timeval it_interval;
+@@ -207,6 +208,7 @@
+ 
+       event_freelist = event->next;
+       event->next = NULL;
++      event->flags &= ~TFLAG_QUEUED;
+ 
+       check_event_queue();
+ 
+@@ -387,6 +389,7 @@
+       }
+ 
+       event->flags &= ~TFLAG_CANCELLED;
++      event->flags |= TFLAG_QUEUED;
+ 
+       unblock_timer();
+ 
+@@ -502,7 +505,15 @@
+               (*(event->func))((timer_t) event, (int)event->arg);
+ 
+               /* If the event has been cancelled, do NOT put it back on the queue. */
+-              if (!(event->flags & TFLAG_CANCELLED)) {
++              /* Check for TFLAG_QUEUED is to avoid pathologic case, when after
++               * dequeueing event handler deletes its own timer and allocates new one
++               * which (at least in some cases) gets the same pointer and thus its
++               * 'flags' will be rewritten, most notably TFLAG_CANCELLED, and, to
++               * complete the disaster, it will be queued. alarm_handler tries to
++               * enqueue 'event' (which is on the same memory position as newly
++               * allocated timer), which results in queueing the same pointer once
++               * more. And this way, loop in event queue is created. */
++              if ( !(event->flags & TFLAG_CANCELLED) && !(event->flags & TFLAG_QUEUED) ) {
+ 
+                       /* if the event is a recurring event, reset the timer and
+                        * find its correct place in the sorted list of events.
+@@ -545,6 +556,7 @@
+                               /* link our new event into the pending event queue. */
+                               event->next = *ppevent;
+                               *ppevent = event;
++                              event->flags |= TFLAG_QUEUED;
+                       } else {
+                               /* there is no interval, so recycle the event structure.
+                                * timer_delete((timer_t) event);