[PATCH 10/17] nvme: switch controller refcounting to use struct device

[Sagi Grimberg]

>> I don't think the fabrics device does not help us to keep the ctrl
>> allocated until we finish removal.
> 
> All fabrics drivers grab an extra reference during ->create_ctrl,
> which we will drop when releasing the file descriptor that we used
> to create the device.
> 
> By the time we call ->delete_ctrl in nvmf_create_ctrl we must still
> have that reference because we are still in a ->write call and thus
> ->release can't have been called yet.

Thanks for the clarification. Is it worth a preparatory patch to
change that before the ctrl device integration for change log
clarity?