From b263680b98fbb41e939ce62e55916254ece4acc7 Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Sat, 22 Jul 2017 09:53:49 +0000
Subject: Fixed bug #865.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@10336 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 os/rt/src/chsem.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'os/rt/src')

diff --git a/os/rt/src/chsem.c b/os/rt/src/chsem.c
index 2b89884ab..90df0dd73 100644
--- a/os/rt/src/chsem.c
+++ b/os/rt/src/chsem.c
@@ -294,11 +294,11 @@ msg_t chSemWaitTimeoutS(semaphore_t *sp, systime_t time) {
 void chSemSignal(semaphore_t *sp) {
 
   chDbgCheck(sp != NULL);
+
+  chSysLock();
   chDbgAssert(((sp->cnt >= (cnt_t)0) && queue_isempty(&sp->queue)) ||
               ((sp->cnt < (cnt_t)0) && queue_notempty(&sp->queue)),
               "inconsistent semaphore");
-
-  chSysLock();
   if (++sp->cnt <= (cnt_t)0) {
     chSchWakeupS(queue_fifo_remove(&sp->queue), MSG_OK);
   }
@@ -379,14 +379,14 @@ msg_t chSemSignalWait(semaphore_t *sps, semaphore_t *spw) {
   msg_t msg;
 
   chDbgCheck((sps != NULL) && (spw != NULL));
+
+  chSysLock();
   chDbgAssert(((sps->cnt >= (cnt_t)0) && queue_isempty(&sps->queue)) ||
               ((sps->cnt < (cnt_t)0) && queue_notempty(&sps->queue)),
               "inconsistent semaphore");
   chDbgAssert(((spw->cnt >= (cnt_t)0) && queue_isempty(&spw->queue)) ||
               ((spw->cnt < (cnt_t)0) && queue_notempty(&spw->queue)),
               "inconsistent semaphore");
-
-  chSysLock();
   if (++sps->cnt <= (cnt_t)0) {
     chSchReadyI(queue_fifo_remove(&sps->queue))->u.rdymsg = MSG_OK;
   }
-- 
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