device_backend_callback error path always says "unable to disconnect",
but this can also happen during the connection of a device. Fix the
error message using the information in aodev->action.
Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>