Re: [PATCH 2/3] block: don't remap ref tag for T10 PI type 0

[Christoph Hellwig <hch@xxxxxx>]

> @@ -186,7 +186,8 @@ void t10_pi_prepare(struct request *rq)
>  	u32 ref_tag = t10_pi_ref_tag(rq);
>  	struct bio *bio;
>  
> -	if (rq->rq_disk->protection_type == T10_PI_TYPE3_PROTECTION)
> +	if (rq->rq_disk->protection_type == T10_PI_TYPE0_PROTECTION ||
> +	    rq->rq_disk->protection_type == T10_PI_TYPE3_PROTECTION)

Maybe just check for the ones we want to remap instead.  And add
a little helper

stastic inline bool blk_integrity_need_remap(struct gendisk *disk)
{
	return disk->protection_type == T10_PI_TYPE1_PROTECTION ||
		disk->protection_type == T10_PI_TYPE2_PROTECTION;
}