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From ddb24b5063e3b4c90295bd4ddaab3bfc428ae79b Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 26 Feb 2012 15:51:50 +0100
Subject: [PATCH 125/140] usb-redir: Return USB_RET_NAK when we've no data for
 an interrupt endpoint

We should return USB_RET_NAK, rather then a 0 sized packet, when we've no data
for an interrupt IN endpoint.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 usb-redir.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/usb-redir.c b/usb-redir.c
index c76e55d..629c87d 100644
--- a/usb-redir.c
+++ b/usb-redir.c
@@ -558,7 +558,10 @@ static int usbredir_handle_interrupt_data(USBRedirDevice *dev,
             /* Check interrupt_error for stream errors */
             status = dev->endpoint[EP2I(ep)].interrupt_error;
             dev->endpoint[EP2I(ep)].interrupt_error = 0;
-            return usbredir_handle_status(dev, status, 0);
+            if (status) {
+                return usbredir_handle_status(dev, status, 0);
+            }
+            return USB_RET_NAK;
         }
         DPRINTF("interrupt-token-in ep %02X status %d len %d\n", ep,
                 intp->status, intp->len);
-- 
1.7.9.3