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Subject: Re: [PATCH 3/5] iommu/tegra-smmu: Use iommu_fwspec in
 .probe_/.attach_device()
To:     Nicolin Chen <nicoleotsuka@gmail.com>,
        Thierry Reding <thierry.reding@gmail.com>
Cc:     linux-kernel@vger.kernel.org, krzk@kernel.org,
        jonathanh@nvidia.com, iommu@lists.linux-foundation.org,
        linux-tegra@vger.kernel.org
References: <20200926080719.6822-1-nicoleotsuka@gmail.com>
 <20200926080719.6822-4-nicoleotsuka@gmail.com>
 <20200928075212.GF2837573@ulmo> <20200928221829.GB15720@Asurada-Nvidia>
From:   Dmitry Osipenko <digetx@gmail.com>
Message-ID: <2a38018a-3f95-74da-6dc1-270efc26a8fb@gmail.com>
Date:   Tue, 29 Sep 2020 07:06:37 +0300
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...
>> As I mentioned in another reply, I think tegra_smmu_find() should be all
>> you need in this case.
> 
> This function is used by .probe_device() where its dev pointer is
> an SMMU client. IIUC, tegra_smmu_find() needs np pointer of "mc".
> For a PCI device that doesn't have a DT node with iommus property,
> not sure how we can use tegra_smmu_find().

Perhaps you could get np from struct pci_dev.bus?