[PATCHv3 7/7] nvme: convert metadata mapping to dma iter

[Keith Busch]

On Tue, Jul 29, 2025 at 07:34:42AM -0700, Keith Busch wrote:
> +static blk_status_t nvme_map_metadata(struct request *req)
>  {

...

> +	nvme_pci_sgl_set_seg(sg_list, sgl_dma, i);

This needs an error check and unmap if so, just like data prp/sgl setup:

	if (unlikely(iter->status))
		nvme_unmap_metadata(req);

> +	return iter.status;
>  }