linux-kernel - Re: [PATCH 1/2] soc: qcom: rpmhpd: Use corner in power

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Date:   Thu, 15 Jul 2021 16:10:33 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] soc: qcom: rpmhpd: Use corner in power_off

On 2021-07-03 06:24, Bjorn Andersson wrote:
> rpmhpd_aggregate_corner() takes a corner as parameter, but in
> rpmhpd_power_off() the code requests the level of the first corner
> instead.
> 
> In all (known) current cases the first corner has level 0, so this
> change should be a nop, but in case that there's a power domain with a
> non-zero lowest level this makes sure that rpmhpd_power_off() actually
> requests the lowest level - which is the closest to "power off" we can
> get.
> 
> While touching the code, also skip the unnecessary zero-initialization
> of "ret".
> 
> Fixes: 279b7e8a62cc ("soc: qcom: rpmhpd: Add RPMh power domain driver")
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Reviewed-by: Sibi Sankar <sibis@...eaurora.org>
Tested-by: Sibi Sankar <sibis@...eaurora.org>

> ---
>  drivers/soc/qcom/rpmhpd.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/soc/qcom/rpmhpd.c b/drivers/soc/qcom/rpmhpd.c
> index 2daa17ba54a3..fa209b479ab3 100644
> --- a/drivers/soc/qcom/rpmhpd.c
> +++ b/drivers/soc/qcom/rpmhpd.c
> @@ -403,12 +403,11 @@ static int rpmhpd_power_on(struct
> generic_pm_domain *domain)
>  static int rpmhpd_power_off(struct generic_pm_domain *domain)
>  {
>  	struct rpmhpd *pd = domain_to_rpmhpd(domain);
> -	int ret = 0;
> +	int ret;
> 
>  	mutex_lock(&rpmhpd_lock);
> 
> -	ret = rpmhpd_aggregate_corner(pd, pd->level[0]);
> -
> +	ret = rpmhpd_aggregate_corner(pd, 0);
>  	if (!ret)
>  		pd->enabled = false;

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