From 21ae5ce1970c4a1b27461d65468c2fb4ffa7d726 Mon Sep 17 00:00:00 2001
From: Martin Ling <martin-git@earth.li>
Date: Wed, 6 May 2015 20:15:46 +0100
Subject: [PATCH] windows: restart_wait_if_needed(): Skip buffer check if no
 bytes read.

---
 serialport.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/serialport.c b/serialport.c
index 58da1e9..ab263a9 100644
--- a/serialport.c
+++ b/serialport.c
@@ -923,6 +923,9 @@ static enum sp_return restart_wait_if_needed(struct sp_port *port, unsigned int
 {
 	int ret, bytes_remaining;
 
+	if (bytes_read == 0)
+		RETURN_OK();
+
 	ret = sp_input_waiting(port);
 
 	if (ret < 0)
@@ -930,7 +933,7 @@ static enum sp_return restart_wait_if_needed(struct sp_port *port, unsigned int
 
 	bytes_remaining = ret;
 
-	if (bytes_read > 0 && bytes_remaining == 0)
+	if (bytes_remaining == 0)
 		TRY(restart_wait(port));
 
 	RETURN_OK();