linux-kernel - Re: [PATCH v2 03/10] PCI/LUO: Forward prepare()/freeze()/cancel() callbacks to driver

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Message-ID: <20250930163837.GQ2695987@ziepe.ca>
Date: Tue, 30 Sep 2025 13:38:37 -0300
From: Jason Gunthorpe <jgg@...pe.ca>
To: Chris Li <chrisl@...nel.org>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Danilo Krummrich <dakr@...nel.org>, Len Brown <lenb@...nel.org>,
	Pasha Tatashin <pasha.tatashin@...een.com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-acpi@...r.kernel.org, David Matlack <dmatlack@...gle.com>,
	Pasha Tatashin <tatashin@...gle.com>,
	Jason Miu <jasonmiu@...gle.com>, Vipin Sharma <vipinsh@...gle.com>,
	Saeed Mahameed <saeedm@...dia.com>,
	Adithya Jayachandran <ajayachandra@...dia.com>,
	Parav Pandit <parav@...dia.com>, William Tu <witu@...dia.com>,
	Mike Rapoport <rppt@...nel.org>, Leon Romanovsky <leon@...nel.org>
Subject: Re: [PATCH v2 03/10] PCI/LUO: Forward prepare()/freeze()/cancel()
 callbacks to driver

On Mon, Sep 29, 2025 at 07:11:06PM -0700, Chris Li wrote:
> On Mon, Sep 29, 2025 at 10:48 AM Jason Gunthorpe <jgg@...pe.ca> wrote:
> >
> > On Tue, Sep 16, 2025 at 12:45:11AM -0700, Chris Li wrote:
> > > After the list of preserved devices is constructed, the PCI subsystem can
> > > now forward the liveupdate request to the driver.
> >
> > This also seems completely backwards for how iommufd should be
> > working. It doesn't want callbacks triggered on prepare, it wants to
> > drive everything from its own ioctl.
> 
> This series is about basic PCI device support, not IOMMUFD.
> 
> > Let's just do one thing at a time please and make this series about
> > iommufd to match the other luo series for iommufd.
> 
> I am confused by you.
> 
> > non-iommufd cases can be proposed in their own series.
> 
> This is that non-iommufd series.

Then don't do generic devices until we get iommufd done and you have a
meaningful in-tree driver to consume what you are adding.

Jason