Re: [patch 21/32] NTB/msi: Convert to msi_on_each_desc()

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..

Jason