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    SubjectRe: [PATCH v5 07/13] block: Add PCI P2P flag for request queue and check support for requests
    On Wed, Sep 05, 2018 at 03:03:18PM -0600, Logan Gunthorpe wrote:
    > There is no special p2p submission process. In the nvme-of case we are
    > using the existing process and with the code in blk-core it didn't
    > change it's process at all. Creating a helper will create one and I can
    > look at making a pci_p2pdma_submit_bio() for v6; but if the developer
    > screws up and still calls the regular submit_bio() things will only be
    > very subtly broken and that won't be obvious.

    I thought about that when reviewing the previous series, and even
    started hacking it up. In the end I decided against it for the above
    reason - it just adds code, but doesn't actually help with anything
    as it is trivial to forget, and not using it will in fact just work.

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