linux-kernel - Re: [patch 19/33] genirq/msi: Provide msi_desc::msi

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Message-ID: <Y3Y4MlLuLotvYbmA@nvidia.com>
Date:   Thu, 17 Nov 2022 09:33:38 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Marc Zyngier <maz@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Dave Jiang <dave.jiang@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Ashok Raj <ashok.raj@...el.com>, Jon Mason <jdmason@...zu.us>,
        Allen Hubbe <allenbh@...il.com>,
        "Ahmed S. Darwish" <darwi@...utronix.de>,
        Reinette Chatre <reinette.chatre@...el.com>
Subject: Re: [patch 19/33] genirq/msi: Provide msi_desc::msi_data

On Thu, Nov 17, 2022 at 09:48:45AM +0100, Thomas Gleixner wrote:

> > We've used 128 bits for the PCI descriptor, we might as well like
> > everyone have all 128 bits for whatever they want to do
> 
> Not sure because we end up with nasty type casts for

Something like:

void *msi_desc_device_priv() {return dec->device_data;}

As netdev does it?

Jason