From 7f2079731b2f4731242762dbc0bfe5ec525dda40 Mon Sep 17 00:00:00 2001
From: Joerg Wunsch <j@uriah.heep.sax.de>
Date: Sat, 22 Feb 2014 20:30:16 +0000
Subject: [PATCH] In usbdev_recv_frame(), fix a bug where a new recv request
 was issued even though all desired data had aldready been received.

git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1277 81a1dc3b-b13d-400b-aceb-764788c761c2
---
 ChangeLog    | 6 ++++++
 usb_libusb.c | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 97cf7356..daea7b05 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2014-02-22  Joerg Wunsch <j.gnu@uriah.heep.sax.de>
+
+	* usb_libusb.c (usbdev_recv_frame): Fix a bug where a new recv
+	request was issued even though all desired data had aldready
+	been received.
+
 2014-02-21  Joerg Wunsch <j.gnu@uriah.heep.sax.de>
 
 	* serial.h: Change the second parameter of the ser_open method
diff --git a/usb_libusb.c b/usb_libusb.c
index 8b512da7..b8e412a0 100644
--- a/usb_libusb.c
+++ b/usb_libusb.c
@@ -460,7 +460,7 @@ static int usbdev_recv_frame(union filedescriptor *fd, unsigned char *buf, size_
       n += rv;
       nbytes -= rv;
     }
-  while (rv == fd->usb.max_xfer);
+  while (nbytes > 0 && rv == fd->usb.max_xfer);
 
   if (nbytes < 0)
     return -1;