linux-kernel - Re: [PATCH v9 5/8] block: set FOLL_PCI_P2PDMA in __bio_iov_iter_get

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Message-ID: <20220905143634.GD5813@lst.de>
Date:   Mon, 5 Sep 2022 16:36:34 +0200
From:   Christoph Hellwig <hch@....de>
To:     Logan Gunthorpe <logang@...tatee.com>
Cc:     linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org,
        linux-block@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-mm@...ck.org, Christoph Hellwig <hch@....de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Christian König <christian.koenig@....com>,
        John Hubbard <jhubbard@...dia.com>,
        Don Dutile <ddutile@...hat.com>,
        Matthew Wilcox <willy@...radead.org>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Minturn Dave B <dave.b.minturn@...el.com>,
        Jason Ekstrand <jason@...kstrand.net>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Xiong Jianxin <jianxin.xiong@...el.com>,
        Bjorn Helgaas <helgaas@...nel.org>,
        Ira Weiny <ira.weiny@...el.com>,
        Robin Murphy <robin.murphy@....com>,
        Martin Oliveira <martin.oliveira@...eticom.com>,
        Chaitanya Kulkarni <ckulkarnilinux@...il.com>,
        Ralph Campbell <rcampbell@...dia.com>,
        Stephen Bates <sbates@...thlin.com>
Subject: Re: [PATCH v9 5/8] block: set FOLL_PCI_P2PDMA in
 __bio_iov_iter_get_pages()

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@....de>