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Date:   Thu, 4 Feb 2021 21:24:23 -0800
From:   Nicolin Chen <nicoleotsuka@gmail.com>
To:     Guillaume Tucker <guillaume.tucker@collabora.com>
Cc:     will@kernel.org, linux-kernel@vger.kernel.org,
        iommu@lists.linux-foundation.org, linux-tegra@vger.kernel.org,
        jonathanh@nvidia.com, vdumpa@nvidia.com, thierry.reding@gmail.com,
        joro@8bytes.org, kernel@collabora.com,
        Dmitry Osipenko <digetx@gmail.com>,
        "kernelci-results@groups.io" <kernelci-results@groups.io>
Subject: Re: [PATCH RESEND v2 4/5] iommu/tegra-smmu: Rework
 tegra_smmu_probe_device()
Message-ID: <20210205052422.GA11329@Asurada-Nvidia>
References: <20201125101013.14953-1-nicoleotsuka@gmail.com>
 <20201125101013.14953-5-nicoleotsuka@gmail.com>
 <46a96cf9-91cc-2ad4-702a-e95ba7200375@collabora.com>
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Hi Guillaume,

On Thu, Feb 04, 2021 at 11:10:15AM +0000, Guillaume Tucker wrote:
> Hi Nicolin,
> 
> A regression was detected by kernelci.org in IGT's drm_read tests
> on mainline, it was first seen on 17th December 2020.  You can
> find some details here:
> 
>   https://kernelci.org/test/case/id/600b82dc1e3208f123d3dffc/

Thanks for reporting the issue. We did test on Tegra210 and Tegra30
yet not on Tegra124. I am wondering what could go wrong...

> Please let us know if you need any help debugging this issue or
> to try a fix on this platform.

Yes, I don't have any Tegra124 platform to run. It'd be very nice
if you can run some debugging patch (I can provide you) and a fix
after I root cause the issue.

Thanks
Nicolin