From bf2a504774f2a4853d12a52f099fc2e084489e73 Mon Sep 17 00:00:00 2001
From: Brendan Le Foll <brendan.le.foll@intel.com>
Date: Fri, 2 Sep 2016 11:48:51 +0100
Subject: [PATCH] firmata_mraa.c: retry counter should not be decremented past
 0

This means the retry counter works appropriately in case of failure. Closes #574

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
---
 src/firmata/firmata_mraa.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/firmata/firmata_mraa.c b/src/firmata/firmata_mraa.c
index 4a7d41a..b6b5b9f 100644
--- a/src/firmata/firmata_mraa.c
+++ b/src/firmata/firmata_mraa.c
@@ -537,7 +537,7 @@ mraa_firmata_plat_init(const char* uart_dev)
 
     // if this isn't working then we have an issue with our uart
     int retry = 20;
-    while (!firmata_dev->isReady && retry--) {
+    while (!firmata_dev->isReady && --retry) {
        firmata_pull(firmata_dev);
     }