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Date:   Tue, 29 Sep 2020 22:34:25 -0700
From:   Nicolin Chen <nicoleotsuka@gmail.com>
To:     Dmitry Osipenko <digetx@gmail.com>
Cc:     thierry.reding@gmail.com, joro@8bytes.org, krzk@kernel.org,
        vdumpa@nvidia.com, jonathanh@nvidia.com,
        linux-tegra@vger.kernel.org, iommu@lists.linux-foundation.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 3/3] iommu/tegra-smmu: Add PCI support
Message-ID: <20200930053425.GC31821@Asurada-Nvidia>
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On Wed, Sep 30, 2020 at 08:10:35AM +0300, Dmitry Osipenko wrote:
> 30.09.2020 03:30, Nicolin Chen пишет:
> >  void tegra_smmu_remove(struct tegra_smmu *smmu)
> >  {
> > +	bus_set_iommu(&platform_bus_type, NULL);
> 
> Why only platform_bus? Is this really needed at all?

I see qcom_iommu.c file set to NULL in remove(), Probably should
have added pci_bus_type too though.

Or are you sure that there's no need at all?