On Thu, Aug 25, 2022 at 09:24:22AM -0600, Logan Gunthorpe wrote: > + if (bio->bi_bdev && bio->bi_bdev->bd_disk && > + blk_queue_pci_p2pdma(bio->bi_bdev->bd_disk->queue)) bdev->bd_disk is never NULL. Otherwise looks good: Reviewed-by: Christoph Hellwig <hch at lst.de>