linux-kernel - RE: [PATCH v2 01/15] vfio: Add helpers for unifying vfio

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Message-ID: <BN9PR11MB527639DCC5706ADA8F0519D38C409@BN9PR11MB5276.namprd11.prod.outlook.com>
Date:   Thu, 8 Sep 2022 06:19:43 +0000
From:   "Tian, Kevin" <kevin.tian@...el.com>
To:     "eric.auger@...hat.com" <eric.auger@...hat.com>,
        Zhenyu Wang <zhenyuw@...ux.intel.com>,
        "Wang, Zhi A" <zhi.a.wang@...el.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        "Vivi, Rodrigo" <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Eric Farman <farman@...ux.ibm.com>,
        Matthew Rosato <mjrosato@...ux.ibm.com>,
        Halil Pasic <pasic@...ux.ibm.com>,
        Vineeth Vijayan <vneethv@...ux.ibm.com>,
        "Peter Oberparleiter" <oberpar@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Tony Krowiak <akrowiak@...ux.ibm.com>,
        Jason Herne <jjherne@...ux.ibm.com>,
        Harald Freudenberger <freude@...ux.ibm.com>,
        Diana Craciun <diana.craciun@....nxp.com>,
        "Alex Williamson" <alex.williamson@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Longfang Liu <liulongfang@...wei.com>,
        Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Yishai Hadas <yishaih@...dia.com>,
        Kirti Wankhede <kwankhede@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Abhishek Sahu <abhsahu@...dia.com>,
        "intel-gvt-dev@...ts.freedesktop.org" 
        <intel-gvt-dev@...ts.freedesktop.org>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>
CC:     "Liu, Yi L" <yi.l.liu@...el.com>
Subject: RE: [PATCH v2 01/15] vfio: Add helpers for unifying vfio_device life
 cycle

> From: Eric Auger <eric.auger@...hat.com>
> Sent: Thursday, September 8, 2022 3:28 AM
> > +/*
> > + * Alloc and initialize vfio_device so it can be registered to vfio
> > + * core.
> > + *
> > + * Drivers should use the wrapper vfio_alloc_device() for allocation.
> > + * @size is the size of the structure to be allocated, including any
> > + * private data used by the driver.
> > + *
> > + * Driver may provide an @init callback to cover device private data.
> nit: this comment may rather relate to the vfio_init_device function

Yes but vfio_init_device() is used only by ccw and presumably will be
abandoned once ccw fixes its life cycle mess. Given that I prefer to leaving
the comment here to be noted by broader users.

> Besides
> 
> Reviewed-by: Eric Auger <eric.auger@...hat.com>
> 

Thanks and other comments adopted.