gpu: galcore: Optimize gckEVENT_Notify

Don't bother trying to get the eventQueueMutex unless we have
pending events and are going to do something with them.

Signed-off-by: Jon Nettleton <[email protected]>

Author: jnettlet

drivers/mxc/gpu-viv/hal/kernel/gc_hal_kernel_event.c

@@ -2332,12 +2332,6 @@ gckEVENT_Notify(
     {
         gcsEVENT_PTR record;
 
-        /* Grab the mutex queue. */
-        gcmkONERROR(gckOS_AcquireMutex(Event->os,
-                                       Event->eventQueueMutex,
-                                       gcvINFINITE));
-        acquired = gcvTRUE;
-
         gckOS_AtomGet(Event->os, Event->pending, (gctINT32_PTR)&pending);
 
         if (pending == 0)
@@ -2385,6 +2379,12 @@ gckEVENT_Notify(
 
         queue = gcvNULL;
 
+        /* Grab the mutex queue. */
+        gcmkONERROR(gckOS_AcquireMutex(Event->os,
+                                       Event->eventQueueMutex,
+                                       gcvINFINITE));
+        acquired = gcvTRUE;
+
         gcmDEBUG_ONLY(
             if (IDs == 0)
             {