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

[Christoph Hellwig]

On Thu, Oct 19, 2017 at 01:02:59PM +0300, Sagi Grimberg wrote:
>> 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?

Well, the ctrl device integration is what enables us to do this.
Before that the ctrl refcount could have reached null by the time
we call the delete_ctrl method.