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Date: Mon, 02 Jul 2012 17:59:54 +0200
From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] usb_packet_complete: Assertion ... failed
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To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Erik Rull <erik.rull@rdsoftware.de>, qemu-devel <qemu-devel@nongnu.org>

On 07/02/12 17:47, Gerd Hoffmann wrote:
>> diff --git a/hw/usb/core.c b/hw/usb/core.c
>> index 0e02da7..eacda74 100644
>> --- a/hw/usb/core.c
>> +++ b/hw/usb/core.c
>> @@ -407,7 +407,9 @@ void usb_packet_complete(USBDevice *dev, USBPacket *p)
>>      int ret;
>>  
>>      usb_packet_check_state(p, USB_PACKET_ASYNC);
>> -    assert(QTAILQ_FIRST(&ep->queue) == p);
>> +    if (QTAILQ_FIRST(&ep->queue) != p) {
>> +        trace_usb_assert(usb_bus_from_device(dev)->busnr, dev->port->path, p->ep->nr, p);
>> +    }
> 
> Can you also log QTAILQ_FIRST(&ep->queue) there?

Oh, I think I've found it.  It's most likely NULL.

> Can I also get a "lsusb -v" for the usb device in question?

Would still be useful.

thanks,
  Gerd