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

[Puranjay Mohan]

Christoph Hellwig <hch at lst.de> writes:

> 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.

Sure,
I will send v2 with these changes now.

P.S. - It looks like we will need manual backports for stable kernels as
this won't apply directly. I will send them after this is accepted.

Thanks,
Puranjay