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Date: Thu, 17 Jan 2013 09:34:46 +0100
From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] [RFC] Add serial number to usbdevice when
 passthrough to VM
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To: Lei Li <lilei@linux.vnet.ibm.com>
Cc: qemu-devel <qemu-devel@nongnu.org>

  Hi,

> But as the backinfo's request, should we extented the usbdevice parameter
> like:
> 
> --usbdevice host:<vendor id>[:<product id>[:<serial number>]?

-usbdevice is legacy syntax and isn't going to be extended.

Adding an "serial" property to usb-host is an option though.
Patches are welcome.

cheers,
  Gerd