linux-kernel - Re: [PATCH v2 3/3] iommu/tegra-smmu: Add PCI support

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Date:   Wed, 30 Sep 2020 09:01:09 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Nicolin Chen <nicoleotsuka@...il.com>
Cc:     thierry.reding@...il.com, joro@...tes.org, krzk@...nel.org,
        vdumpa@...dia.com, jonathanh@...dia.com,
        linux-tegra@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/3] iommu/tegra-smmu: Add PCI support

30.09.2020 08:34, Nicolin Chen пишет:
> 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?
> 

It wasn't here before this patch and platform_bus is unrelated to the
topic of this patch. But it probably should be there.

On the other hand, the tegra_smmu_remove() is unused and maybe it could
be better to get rid of this unused function at all.