linux-kernel - Re: [PATCH v13 2/5] soc: qcom: rpmh: Update dirty flag only when data changes

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Message-ID: <CAD=FV=X9BFJZtgmVeDpr1mCP1C5kg9+3gQo2i5RMfBuQOVMkDg@mail.gmail.com>
Date:   Mon, 9 Mar 2020 16:42:15 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Maulik Shah <mkshah@...eaurora.org>
Cc:     Stephen Boyd <swboyd@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Evan Green <evgreen@...omium.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Andy Gross <agross@...nel.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Lina Iyer <ilina@...eaurora.org>, lsrao@...eaurora.org
Subject: Re: [PATCH v13 2/5] soc: qcom: rpmh: Update dirty flag only when data changes

Hi,

On Mon, Mar 9, 2020 at 2:31 AM Maulik Shah <mkshah@...eaurora.org> wrote:
>
> Currently rpmh ctrlr dirty flag is set for all cases regardless of data
> is really changed or not. Add changes to update dirty flag when data is
> changed to newer values. Update dirty flag everytime when data in batch
> cache is updated since rpmh_flush() may get invoked from any CPU instead
> of only last CPU going to low power mode.
>
> Also move dirty flag updates to happen from within cache_lock and remove
> unnecessary INIT_LIST_HEAD() call and a default case from switch.
>
> Fixes: 600513dfeef3 ("drivers: qcom: rpmh: cache sleep/wake state requests")
> Signed-off-by: Maulik Shah <mkshah@...eaurora.org>
> Reviewed-by: Srinivas Rao L <lsrao@...eaurora.org>
> Reviewed-by: Evan Green <evgreen@...omium.org>
> ---
>  drivers/soc/qcom/rpmh.c | 19 +++++++++++--------
>  1 file changed, 11 insertions(+), 8 deletions(-)

Reviewed-by: Douglas Anderson <dianders@...omium.org>