[PATCH v2 3/4] nvme: enable SG gaps support

[Sagi Grimberg]

>  	if (ctrl->quirks & NVME_QUIRK_STRIPE_SIZE)
>  		blk_queue_chunk_sectors(q, ctrl->max_hw_sectors);
> -	blk_queue_virt_boundary(q, ctrl->page_size - 1);
> +
> +	if (!ctrl->sg_gaps_support)
> +		blk_queue_virt_boundary(q, ctrl->page_size - 1);
> +

I think it would be better if the ctrl will hold a virt_boundary
provided by the fabric driver? Then we would always
blk_queue_virt_boundary but with capable devices the fabric driver
can set it to 0. This will also allow for dword aligned sgls to
fit in pretty easily.