From 4debe195d2d93f68b6e0d2ba4484c7132c7ee650 Mon Sep 17 00:00:00 2001
From: Nathael Pajani <nathael.pajani@ed3l.fr>
Date: Tue, 15 May 2012 01:21:32 +0200
Subject: [PATCH] Added timeout (fixed, 500ms) to read commands

---
 isp_utils.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/isp_utils.c b/isp_utils.c
index af702d9..950fd95 100644
--- a/isp_utils.c
+++ b/isp_utils.c
@@ -148,6 +148,7 @@ int isp_serial_read(char* buf, unsigned int buf_size, unsigned int min_read)
 {
 	int nb = 0;
 	unsigned int count = 0;
+	unsigned int loops = 0; /* Used to create a timeout */
 	
 	if (min_read > buf_size) {
 		printf("serial_read: buffer too small for min read value.\n");
@@ -158,6 +159,9 @@ int isp_serial_read(char* buf, unsigned int buf_size, unsigned int min_read)
 		nb = read(serial_fd, &buf[count], (buf_size - count));
 		if (nb < 0) {
 			if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) {
+				if (loops++ > 100) {
+					break; /* timeout at 500ms */
+				}
 				usleep( 5000 );
 				continue;
 			}
-- 
2.43.0