[Qemu-devel] [PATCH 5/6] usb-redir: Return USB_RET_NAK when we've no data for an interrupt endpoint

[Hans de Goede <hdegoede@redhat.com>]

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 |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/usb-redir.c b/usb-redir.c
index c76e55d..ea828a8 100644
--- a/usb-redir.c
+++ b/usb-redir.c
@@ -558,7 +558,9 @@ 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);
-- 
1.7.7.6