From 52e98077ee867e31189c43ad592cf97f386cac93 Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Thu, 15 Mar 2012 19:54:36 +0000
Subject: Fixed bug 3504450.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@4039 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 os/kernel/src/chmboxes.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'os/kernel')

diff --git a/os/kernel/src/chmboxes.c b/os/kernel/src/chmboxes.c
index 86f88dce7..163f93f20 100644
--- a/os/kernel/src/chmboxes.c
+++ b/os/kernel/src/chmboxes.c
@@ -364,6 +364,7 @@ msg_t chMBFetchI(Mailbox *mbp, msg_t *msgp) {
 
   if (chSemGetCounterI(&mbp->mb_fullsem) <= 0)
     return RDY_TIMEOUT;
+  chSemFastWaitI(&mbp->mb_fullsem);
   *msgp = *mbp->mb_rdptr++;
   if (mbp->mb_rdptr >= mbp->mb_top)
     mbp->mb_rdptr = mbp->mb_buffer;
-- 
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