Fixed bug #1093.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/stable_20.3.x@13633 27425a3e-05d8-49a3-a47f-9c15f0e5edd8

os/rt/src/chsem.c

@@ -145,7 +145,6 @@ void chSemResetWithMessage(semaphore_t *sp, cnt_t n, msg_t msg) {
  * @iclass
  */
 void chSemResetWithMessageI(semaphore_t *sp, cnt_t n, msg_t msg) {
-  cnt_t cnt;
 
   chDbgCheckClassI();
   chDbgCheck((sp != NULL) && (n >= (cnt_t)0));
@@ -153,9 +152,8 @@ void chSemResetWithMessageI(semaphore_t *sp, cnt_t n, msg_t msg) {
               ((sp->cnt < (cnt_t)0) && queue_notempty(&sp->queue)),
               "inconsistent semaphore");
 
-  cnt = sp->cnt;
   sp->cnt = n;
-  while (++cnt <= (cnt_t)0) {
+  while (queue_notempty(&sp->queue)) {
     chSchReadyI(queue_lifo_remove(&sp->queue))->u.rdymsg = msg;
   }
 }

readme.txt

@@ -73,6 +73,10 @@
 *** Releases and Change Log                                               ***
 *****************************************************************************
 
+*** 20.3.2 ***
+- FIX: Fixed failure in chSemReset() function when counter is equal to MAXINT
+       (bug #1093).
+
 *** 20.3.1 ***
 - NEW: STM32 ICU driver now allows to setup the ARR register in the
        configuration structure, the default value should be 0xFFFFFFFFU.