[PATCH] nvme: check if the namespace supports metadata in nvme_map_user_request()

[Christoph Hellwig]

On Tue, Aug 27, 2024 at 12:17:01PM +0000, Puranjay Mohan wrote:
> +	if (meta_buffer && meta_len && bdev && !blk_get_integrity(bdev->bd_disk))
> +		return -EINVAL;

Overly long line here.  If we go past my initial RFC I'd probably
restructure the function a little bit, i.e. add a new

	bool has_metadata = bdev && meta_buffer && meta_len;

and then use that both for the support check and the actualy mapping
below.