Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH v2 3/3] iommu/tegra-smmu: Add PCI support
To:     Nicolin Chen <nicoleotsuka@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
References: <20200930003013.31289-1-nicoleotsuka@gmail.com>
 <20200930003013.31289-4-nicoleotsuka@gmail.com>
 <5a91f07c-bc27-7607-915c-e98a7a0c4b24@gmail.com>
 <20200930053425.GC31821@Asurada-Nvidia>
From:   Dmitry Osipenko <digetx@gmail.com>
Message-ID: <84f05ebd-1123-5dfb-94fe-62564a21706f@gmail.com>
Date:   Wed, 30 Sep 2020 09:01:09 +0300
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101
 Thunderbird/68.10.0
MIME-Version: 1.0
In-Reply-To: <20200930053425.GC31821@Asurada-Nvidia>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 8bit
Precedence: bulk

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.