linux-kernel - Re: [PATCH mlx5-next v1 06/11] vdpa/mlx5: Connect mlx5

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Date:   Thu, 5 Nov 2020 08:33:02 +0100
From:   gregkh <gregkh@...uxfoundation.org>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Leon Romanovsky <leon@...nel.org>,
        Doug Ledford <dledford@...hat.com>,
        Leon Romanovsky <leonro@...dia.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Jason Wang <jasowang@...hat.com>,
        linux-rdma <linux-rdma@...r.kernel.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Netdev <netdev@...r.kernel.org>, Parav Pandit <parav@...dia.com>,
        Roi Dayan <roid@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        virtualization@...ts.linux-foundation.org,
        alsa-devel@...a-project.org, Takashi Iwai <tiwai@...e.de>,
        Mark Brown <broonie@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Fred Oh <fred.oh@...ux.intel.com>,
        "Saleem, Shiraz" <shiraz.saleem@...el.com>,
        "Patil, Kiran" <kiran.patil@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        David M Ertman <david.m.ertman@...el.com>,
        Jason Gunthorpe <jgg@...pe.ca>
Subject: Re: [PATCH mlx5-next v1 06/11] vdpa/mlx5: Connect mlx5_vdpa to
 auxiliary bus

On Wed, Nov 04, 2020 at 03:21:23PM -0800, Dan Williams wrote:
> On Tue, Nov 3, 2020 at 7:45 AM Jason Gunthorpe <jgg@...pe.ca> wrote:
> [..]
> > > +MODULE_DEVICE_TABLE(auxiliary, mlx5v_id_table);
> > > +
> > > +static struct auxiliary_driver mlx5v_driver = {
> > > +     .name = "vnet",
> > > +     .probe = mlx5v_probe,
> > > +     .remove = mlx5v_remove,
> > > +     .id_table = mlx5v_id_table,
> > > +};
> >
> > It is hard to see from the diff, but when this patch is applied the
> > vdpa module looks like I imagined things would look with the auxiliary
> > bus. It is very similar in structure to a PCI driver with the probe()
> > function cleanly registering with its subsystem. This is what I'd like
> > to see from the new Intel RDMA driver.
> >
> > Greg, I think this patch is the best clean usage example.
> >
> > I've looked over this series and it has the right idea and
> > parts. There is definitely more that can be done to improve mlx5 in
> > this area, but this series is well scoped and cleans a good part of
> > it.
> 
> Greg?
> 
> I know you alluded to going your own way if the auxiliary bus patches
> did not shape up soon, but it seems they have and the stakeholders
> have reached this consensus point.
> 
> Were there any additional changes you wanted to see happen? I'll go
> give the final set another once over, but David has been diligently
> fixing up all the declared major issues so I expect to find at most
> minor incremental fixups.

This is in my to-review pile, along with a load of other stuff at the
moment:
	$ ~/bin/mdfrm -c ~/mail/todo/
	1709 messages in /home/gregkh/mail/todo/

So give me a chance.  There is no rush on my side for this given the
huge delays that have happened here on the authorship side many times in
the past :)

If you can review it, or anyone else, that is always most appreciated.

thanks,

greg k-h