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

[Christoph Hellwig]

> @@ -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;
}