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Date:   Tue, 23 Mar 2021 20:17:26 +0100
From:   Christoph Hellwig <hch@lst.de>
To:     Jason Gunthorpe <jgg@nvidia.com>
Cc:     Alex Williamson <alex.williamson@redhat.com>,
        Cornelia Huck <cohuck@redhat.com>, kvm@vger.kernel.org,
        Kirti Wankhede <kwankhede@nvidia.com>,
        "Raj, Ashok" <ashok.raj@intel.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Christoph Hellwig <hch@lst.de>,
        Leon Romanovsky <leonro@nvidia.com>,
        Max Gurtovoy <mgurtovoy@nvidia.com>,
        Tarun Gupta <targupta@nvidia.com>
Subject: Re: [PATCH 07/18] vfio/mdev: Add missing reference counting to
 mdev_type
Message-ID: <20210323191726.GE17735@lst.de>
References: <0-v1-7dedf20b2b75+4f785-vfio2_jgg@nvidia.com> <7-v1-7dedf20b2b75+4f785-vfio2_jgg@nvidia.com>
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On Tue, Mar 23, 2021 at 02:55:24PM -0300, Jason Gunthorpe wrote:
> struct mdev_type holds a pointer to the kref'd object struct mdev_parent,
> but doesn't hold the kref. The lifetime of the parent becomes implicit
> because parent_remove_sysfs_files() is supposed to remove all the access
> before the parent can be freed, but this is very hard to reason about.
> 
> Make it obviously correct by adding the missing get.

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>