linux-kernel - Re: [PATCH 3/5] iommu/tegra-smmu: Use iommu_fwspec in .probe_/.attach

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Message-ID: <2a38018a-3f95-74da-6dc1-270efc26a8fb@gmail.com>
Date:   Tue, 29 Sep 2020 07:06:37 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Nicolin Chen <nicoleotsuka@...il.com>,
        Thierry Reding <thierry.reding@...il.com>
Cc:     linux-kernel@...r.kernel.org, krzk@...nel.org,
        jonathanh@...dia.com, iommu@...ts.linux-foundation.org,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH 3/5] iommu/tegra-smmu: Use iommu_fwspec in
 .probe_/.attach_device()

...
>> 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?