linux-kernel - Re: [PATCH 08/23] interconnect: qcom: rpm: fix registration race

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Message-ID: <CABymUCMgmyLRGo+b4ZiVJacxc=hnfo7iiYBNj2i5UPrq3XL0nQ@mail.gmail.com>
Date:   Fri, 3 Feb 2023 12:06:57 +0800
From:   Jun Nie <jun.nie@...aro.org>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Georgi Djakov <djakov@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Artur Świgoń <a.swigon@...sung.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, Georgi Djakov <georgi.djakov@...aro.org>
Subject: Re: [PATCH 08/23] interconnect: qcom: rpm: fix registration race

Johan Hovold <johan+linaro@...nel.org> 于2023年2月1日周三 18:16写道：
>
> The current interconnect provider registration interface is inherently
> racy as nodes are not added until the after adding the provider. This
> can specifically cause racing DT lookups to fail.
>
> Switch to using the new API where the provider is not registered until
> after it has been fully initialised.
>
> Fixes: 62feb14ee8a3 ("interconnect: qcom: Consolidate interconnect RPM support")
> Fixes: 30c8fa3ec61a ("interconnect: qcom: Add MSM8916 interconnect provider driver")
> Cc: stable@...r.kernel.org      # 5.7
> Cc: Jun Nie <jun.nie@...aro.org>
> Cc: Georgi Djakov <georgi.djakov@...aro.org>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> ---
>  drivers/interconnect/qcom/icc-rpm.c | 23 ++++++++++++-----------
>  1 file changed, 12 insertions(+), 11 deletions(-)
>
Reviewed-by: Jun Nie <jun.nie@...aro.org>