Re: [PATCH v4 07/35] iommu/mediatek: Add mutex for data in the mtk_iommu_domain

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Subject: Re: [PATCH v4 07/35] iommu/mediatek: Add mutex for data in the mtk_iommu_domain
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Date: Thu, 27 Jan 2022 12:02:55 +0100
Cc: Robin Murphy <robin.murphy@xxxxxxx>, Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>, Tomasz Figa <tfiga@xxxxxxxxxxxx>, linux-mediatek@xxxxxxxxxxxxxxxxxxx, srv_heupstream@xxxxxxxxxxxx, devicetree@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx>, youlin.pei@xxxxxxxxxxxx, anan.sun@xxxxxxxxxxxx, xueqi.zhang@xxxxxxxxxxxx, yen-chang.chen@xxxxxxxxxxxx, mingyuan.ma@xxxxxxxxxxxx, yf.wang@xxxxxxxxxxxx, libo.kang@xxxxxxxxxxxx, chengci.xu@xxxxxxxxxxxx
In-reply-to: <20220125085634.17972-8-yong.wu@mediatek.com>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0

Il 25/01/22 09:56, Yong Wu ha scritto:

Same with the previous patch, add a mutex for the "data" in the
mtk_iommu_domain. Just improve the safety for multi devices
enter attach_device at the same time. We don't get the real issue
for this.

Signed-off-by: Yong Wu <yong.wu@xxxxxxxxxxxx>


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

References:
- [PATCH v4 00/35] MT8195 IOMMU SUPPORT
  - From: Yong Wu
- [PATCH v4 07/35] iommu/mediatek: Add mutex for data in the mtk_iommu_domain
  - From: Yong Wu

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