Re: [PATCH v4 1/2] nvme: cache struct nvme_ctrl reference to struct nvme_request

[Keith Busch]

On Tue, Jun 26, 2018 at 03:51:40PM +0200, Johannes Thumshirn wrote:
> @@ -652,6 +653,7 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
>  	}
>  
>  	cmd->common.command_id = req->tag;
> +	nvme_req(req)->ctrl = ctrl;
>  	if (ns)
>  		trace_nvme_setup_nvm_cmd(req->q->id, cmd);
>  	else

I don't think we need to do this per-io. The request coming from the
controller's tagset, so we can do this just once at .init_request time,
right?