linux-kernel - Re: [PATCH v3] iommu/s390: Add support for iommu

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Date:   Fri, 11 Aug 2017 19:19:51 +0200 (CEST)
From:   Sebastian Ott <sebott@...ux.vnet.ibm.com>
To:     Joerg Roedel <joro@...tes.org>
cc:     Gerald Schaefer <gerald.schaefer@...ibm.com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Joerg Roedel <jroedel@...e.de>
Subject: Re: [PATCH v3] iommu/s390: Add support for iommu_device handling

On Fri, 11 Aug 2017, Sebastian Ott wrote:
> * That patch embedded a struct iommu_device within struct zpci_dev but
> the iommu_device has a release function (via its class) - so when
> the release function gets called it frees memory that was never allocated.
> The fix is to not embedd struct iommu_device in zpci_dev (see below)

While discussing the problem with Gerald he noticed that
struct iommu_device is embedded in other structs. So that
is potentially broken in other cases, too.

Sebastian