Can not use hmp block_resize command with -blockdev option

[zhao xiaojun]

Hi, 

I use -blockdev option to specify a drive when qemu boot and i want to resize it with hmp block_resize command. The hmp block_resize comand's arguments: block_resize device new_size.

So I query the device by qmp query_block command, but the device filed of the result output is NULL string.

result output:

{
  "return": [
    {
      "io-status": "ok",
      "device": "",

        ...

}

I noticed that the qmp block_resize command supports device or node-name as argument.

If i can continue use the the hmp block_resize command with the device argument?

Regards.