linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: sc8280xp: fix UFS DMA coherency

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Message-ID: <20221205120148.GB20192@thinkpad>
Date:   Mon, 5 Dec 2022 17:31:48 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Bjorn Andersson <andersson@...nel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Bart Van Assche <bvanassche@....org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-scsi@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: qcom: sc8280xp: fix UFS DMA coherency

On Mon, Dec 05, 2022 at 11:08:37AM +0100, Johan Hovold wrote:
> The SC8280XP UFS controllers are cache coherent and must be marked as
> such in the devicetree to avoid potential data corruption.
> 
> Fixes: 152d1faf1e2f ("arm64: dts: qcom: add SC8280XP platform")
> Cc: stable@...r.kernel.org      # 6.0
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Thanks,
Mani

> ---
>  arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> index c4947c563099..23d1f51527aa 100644
> --- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> @@ -1430,6 +1430,7 @@ ufs_mem_hc: ufs@...4000 {
>  			required-opps = <&rpmhpd_opp_nom>;
>  
>  			iommus = <&apps_smmu 0xe0 0x0>;
> +			dma-coherent;
>  
>  			clocks = <&gcc GCC_UFS_PHY_AXI_CLK>,
>  				 <&gcc GCC_AGGRE_UFS_PHY_AXI_CLK>,
> @@ -1491,6 +1492,7 @@ ufs_card_hc: ufs@...4000 {
>  			power-domains = <&gcc UFS_CARD_GDSC>;
>  
>  			iommus = <&apps_smmu 0x4a0 0x0>;
> +			dma-coherent;
>  
>  			clocks = <&gcc GCC_UFS_CARD_AXI_CLK>,
>  				 <&gcc GCC_AGGRE_UFS_CARD_AXI_CLK>,
> -- 
> 2.37.4
> 

-- 
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