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

[Keith Busch]

On Tue, Aug 27, 2024 at 12:17:01PM +0000, Puranjay Mohan wrote:
> @@ -122,6 +123,9 @@ static int nvme_map_user_request(struct request *req, u64 ubuffer,
>  	struct bio *bio = NULL;
>  	int ret;
>  
> +	if (meta_buffer && meta_len && bdev && !blk_get_integrity(bdev->bd_disk))
> +		return -EINVAL;
> +

Should we also fail if there's no bdev? The driver won't use the
requested metadata for admin commands either, so that is also an invalid
user request.