linux-kernel - Re: [PATCH v9 03/15] iommu/mediatek: Return ENODEV if the device is NULL

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Message-ID: <a6a8bb2b-8538-a27c-8e6b-21eb33ecfacd@collabora.com>
Date:   Tue, 11 Jan 2022 11:57:49 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Yong Wu <yong.wu@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        David Airlie <airlied@...ux.ie>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Dafna Hirschfeld <dafna.hirschfeld@...labora.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Will Deacon <will.deacon@....com>,
        dri-devel@...ts.freedesktop.org, yf.wang@...iatek.com,
        anthony.huang@...iatek.com, youlin.pei@...iatek.com,
        Evan Green <evgreen@...omium.org>,
        Eizan Miyamoto <eizan@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        linux-arm-kernel@...ts.infradead.org, mingyuan.ma@...iatek.com,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        Philipp Zabel <p.zabel@...gutronix.de>, libo.kang@...iatek.com,
        yi.kuo@...iatek.com, linux-mediatek@...ts.infradead.org,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Tiffany Lin <tiffany.lin@...iatek.com>, anan.sun@...iatek.com,
        srv_heupstream@...iatek.com, acourbot@...omium.org,
        linux-kernel@...r.kernel.org, Tomasz Figa <tfiga@...omium.org>,
        iommu@...ts.linux-foundation.org, Daniel Vetter <daniel@...ll.ch>,
        Robin Murphy <robin.murphy@....com>
Subject: Re: [PATCH v9 03/15] iommu/mediatek: Return ENODEV if the device is
 NULL

Il 12/11/21 11:54, Yong Wu ha scritto:
> The platform device is created at:
> of_platform_default_populate_init:  arch_initcall_sync
>    ->of_platform_populate
>          ->of_platform_device_create_pdata
> 
> When entering our probe, all the devices should be already created.
> if it is null, means NODEV. Currently we don't get the fail case.
> It's a minor fix, no need add fixes tags.
> 
> Signed-off-by: Yong Wu <yong.wu@...iatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>