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Message-ID: <f47513f3-e1a9-1764-9954-cdf6931281a9@gmail.com>
Date:   Thu, 16 Jun 2022 15:03:44 +0200
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To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>, yong.wu@mediatek.com
Cc:     joro@8bytes.org, will@kernel.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org,
        iommu@lists.linux-foundation.org,
        linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        krzysztof.kozlowski@linaro.org, miles.chen@mediatek.com
References: <20220616110830.26037-1-angelogioacchino.delregno@collabora.com>
 <20220616110830.26037-6-angelogioacchino.delregno@collabora.com>
From:   Matthias Brugger <matthias.bgg@gmail.com>
Subject: Re: [PATCH v4 5/5] iommu/mediatek: Cleanup pericfg lookup flow
In-Reply-To: <20220616110830.26037-6-angelogioacchino.delregno@collabora.com>
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On 16/06/2022 13:08, AngeloGioacchino Del Regno wrote:
> Since only the INFRA type IOMMU needs to modify register(s) in the
> pericfg iospace, it's safe to drop the pericfg_comp_str NULL check;
> also, directly assign the regmap handle to data->pericfg instead of
> to the infracfg variable to improve code readability.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>

> ---
>   drivers/iommu/mtk_iommu.c | 12 +++++-------
>   1 file changed, 5 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index 90685946fcbe..b2ae84046249 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -1217,15 +1217,13 @@ static int mtk_iommu_probe(struct platform_device *pdev)
>   			dev_err(dev, "mm dts parse fail(%d).", ret);
>   			goto out_runtime_disable;
>   		}
> -	} else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA) &&
> -		   data->plat_data->pericfg_comp_str) {
> -		infracfg = syscon_regmap_lookup_by_compatible(data->plat_data->pericfg_comp_str);
> -		if (IS_ERR(infracfg)) {
> -			ret = PTR_ERR(infracfg);
> +	} else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA)) {
> +		p = data->plat_data->pericfg_comp_str;
> +		data->pericfg = syscon_regmap_lookup_by_compatible(p);
> +		if (IS_ERR(data->pericfg)) {
> +			ret = PTR_ERR(data->pericfg);
>   			goto out_runtime_disable;
>   		}
> -
> -		data->pericfg = infracfg;
>   	}
>   
>   	platform_set_drvdata(pdev, data);