From 29208a7fae7a32623b8e0348f00cc403a595d7d0 Mon Sep 17 00:00:00 2001
From: Ben Vanik <ben.vanik@gmail.com>
Date: Sun, 5 Jan 2014 00:28:59 -0800
Subject: [PATCH] Fixing broken spinlock.

---
 src/xenia/kernel/xboxkrnl_rtl.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/xenia/kernel/xboxkrnl_rtl.cc b/src/xenia/kernel/xboxkrnl_rtl.cc
index 88646ce45..a558d1f22 100644
--- a/src/xenia/kernel/xboxkrnl_rtl.cc
+++ b/src/xenia/kernel/xboxkrnl_rtl.cc
@@ -751,12 +751,13 @@ void xeRtlEnterCriticalSection(uint32_t cs_ptr, uint32_t thread_id) {
 
   uint32_t spin_wait_remaining = cs->spin_count_div_256 * 256;
 spin:
-  if (xe_atomic_inc_32(&cs->lock_count)) {
+  if (xe_atomic_inc_32(&cs->lock_count) != 0) {
     // If this thread already owns the CS increment the recursion count.
     if (cs->owning_thread_id == thread_id) {
       cs->recursion_count++;
       return;
     }
+    xe_atomic_dec_32(&cs->lock_count);
 
     // Thread was locked - spin wait.
     if (spin_wait_remaining) {