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Date:   Tue, 30 Aug 2022 21:22:30 -0300
From:   Jason Gunthorpe <jgg@ziepe.ca>
To:     Kevin Tian <kevin.tian@intel.com>
Cc:     Zhenyu Wang <zhenyuw@linux.intel.com>,
        Zhi Wang <zhi.a.wang@intel.com>,
        Jani Nikula <jani.nikula@linux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@intel.com>,
        Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Eric Farman <farman@linux.ibm.com>,
        Matthew Rosato <mjrosato@linux.ibm.com>,
        Halil Pasic <pasic@linux.ibm.com>,
        Vineeth Vijayan <vneethv@linux.ibm.com>,
        Peter Oberparleiter <oberpar@linux.ibm.com>,
        Heiko Carstens <hca@linux.ibm.com>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Alexander Gordeev <agordeev@linux.ibm.com>,
        Christian Borntraeger <borntraeger@linux.ibm.com>,
        Sven Schnelle <svens@linux.ibm.com>,
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        Longfang Liu <liulongfang@huawei.com>,
        Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>,
        Yishai Hadas <yishaih@nvidia.com>,
        Eric Auger <eric.auger@redhat.com>,
        Kirti Wankhede <kwankhede@nvidia.com>,
        Leon Romanovsky <leon@kernel.org>,
        Abhishek Sahu <abhsahu@nvidia.com>,
        intel-gvt-dev@lists.freedesktop.org,
        intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
        linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org,
        kvm@vger.kernel.org, Yi Liu <yi.l.liu@intel.com>
Subject: Re: [PATCH 10/15] vfio/fsl-mc: Use the new device life cycle helpers
Message-ID: <Yw6pxrS1zb5JKt8q@ziepe.ca>
References: <20220827171037.30297-1-kevin.tian@intel.com>
 <20220827171037.30297-11-kevin.tian@intel.com>
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On Sun, Aug 28, 2022 at 01:10:32AM +0800, Kevin Tian wrote:
> From: Yi Liu <yi.l.liu@intel.com>
> 
> Export symbol of vfio_release_device_set() so fsl-mc @init can handle
> the error path cleanly instead of assuming certain vfio core API can
> help release device_set afterwards.

I think you should leave it as is, the "device_set" cleanup is just
something handled completely internally to vfio

If ops->init fails then we expect the core code to clean the
device_set, and it does because it calls vfio_init_device() already.

Having a single weirdly placed release in the driver is pretty
confusing, IMHO.

Jason