commit 9c1f67654ab611553bbfca54a1e0922728c25760
author Hans de Goede <hdegoede@redhat.com> Mon Sep 03 12:48:49 2012 +0200
committer Gerd Hoffmann <kraxel@redhat.com> Tue Sep 11 07:42:59 2012 +0200
tree 4bdc0542ec2c1648a69eff6b48db712f5fc02d0a
parent c13a9e61366cc3e28299d8faeb65e65c6e5964cf

usb-core: Allow the first packet of a pipelined ep to complete immediately

This can happen with usb-redir live-migration when the packet gets re-queued
after the migration and the original queuing from the migration source side
has already finished.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

hw/usb/core.c

diff --git a/hw/usb/core.c b/hw/usb/core.c
index fe431d0..b9f1f7a 100644
--- a/hw/usb/core.c
+++ b/hw/usb/core.c
@@ -398,7 +398,7 @@
              * When pipelining is enabled usb-devices must always return async,
              * otherwise packets can complete out of order!
              */
-            assert(!p->ep->pipeline);
+            assert(!p->ep->pipeline || QTAILQ_EMPTY(&p->ep->queue));
             if (ret != USB_RET_NAK) {
                 p->result = ret;
                 usb_packet_set_state(p, USB_PACKET_COMPLETE);