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usb: queue can have async packets

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This can happen today in case the ->complete() callback queues up the
next packet.  Also we'll support pipelining soon, which allows to have
multiple packets per queue in flight (aka ASYNC) state.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2012-02-28 15:36:06 +01:00
parent 7c308b7e38
commit eb9d4673e3
1 changed files with 3 additions and 0 deletions
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3
hw/usb.c
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@ -356,6 +356,9 @@ void usb_packet_complete(USBDevice *dev, USBPacket *p)
while (!QTAILQ_EMPTY(&ep->queue)) {
p = QTAILQ_FIRST(&ep->queue);
if (p->state == USB_PACKET_ASYNC) {
break;
}
assert(p->state == USB_PACKET_QUEUED);
ret = usb_process_one(p);
if (ret == USB_RET_ASYNC) {