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    SubjectRe: [patch 21/32] NTB/msi: Convert to msi_on_each_desc()
    Date
    On Wed, Dec 01 2021 at 11:11, Jason Gunthorpe wrote:
    > On Wed, Dec 01, 2021 at 03:52:02PM +0100, Thomas Gleixner wrote:
    >> So we really can go and create a MSI irqdomain and stick the pointer
    >> into stdev->dev.irqdomain. The parent domain of this irqdomain is
    >>
    >> stdev->pdev.dev.irqdomain->parent
    >
    > It can work (pending some solution to the iommu stuff), but IMHO it is
    > strange/hacky to put HW objects like irqdomain on what is a character
    > struct device with a set major/minor in dev->devt and associated
    > struct cdev.
    >
    > Conceptually it makes no sense to me, cdevs are software constructs,
    > they should never go into HW areas..

    I picked that because it _is_ already used to establish the connection
    to the switchtec_class NTB driver which is beyond the usual cdev muck.

    Thanks,

    tglx

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