On Fr, 2014-09-12 at 21:24 +0200, Markus Armbruster wrote:
> usb_msd_init() calls qemu_opts_create() with a made-up ID and false
> fail_if_exists.  If the ID already exists, it happily messes up those
> options, then fails drive_new(), because the BlockDriverState with
> that ID already exists, too.
> 
> Reproducer: -drive if=none,id=usb0,format=raw -usbdevice disk:tmp.qcow2
> 
> Pass true fail_if_exists to qemu_opts_create(), and if it fails, try
> the next made-up ID.
> 
> The reproducer now succeeds, and creates an usb-storage device with ID
> usb1.
> 
> Signed-off-by: Markus Armbruster <arm...@redhat.com>

Added to usb patch queue.

thanks,
  Gerd




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