[PATCHv3 2/7] blk-mq-dma: provide the bio_vec list being iterated

[Kanchan Joshi]

On 7/29/2025 8:04 PM, Keith Busch wrote:
> @@ -151,6 +146,11 @@ bool blk_rq_dma_map_iter_start(struct request *req, struct device *dma_dev,
>   	memset(&iter->p2pdma, 0, sizeof(iter->p2pdma));
>   	iter->status = BLK_STS_OK;
>   
> +	if (req->rq_flags & RQF_SPECIAL_PAYLOAD)
> +		iter->iter.bvec = &req->special_vec;

I am not certain yet, but thinking whether this is enough to handle 
RQF_SPECIAL_PAYLOAD correctly.
Maybe "req->special_vec.bv_len" also need to be included here to 
initialize the iter.