linux-kernel - Re: [PATCH v7 03/15] PM / EM: update callback structure and add device pointer

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Message-ID: <20200511115722.GA13741@google.com>
Date:   Mon, 11 May 2020 12:57:22 +0100
From:   Quentin Perret <qperret@...gle.com>
To:     Lukasz Luba <lukasz.luba@....com>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org, linux-omap@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
        linux-imx@....com, Dietmar.Eggemann@....com, cw00.choi@...sung.com,
        b.zolnierkie@...sung.com, rjw@...ysocki.net, sudeep.holla@....com,
        viresh.kumar@...aro.org, nm@...com, sboyd@...nel.org,
        rui.zhang@...el.com, amit.kucheria@...durent.com,
        daniel.lezcano@...aro.org, mingo@...hat.com, peterz@...radead.org,
        juri.lelli@...hat.com, vincent.guittot@...aro.org,
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        tomeu.vizoso@...labora.com, alyssa.rosenzweig@...labora.com,
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        orjan.eide@....com, rdunlap@...radead.org, mka@...omium.org
Subject: Re: [PATCH v7 03/15] PM / EM: update callback structure and add
 device pointer

On Monday 11 May 2020 at 12:19:00 (+0100), Lukasz Luba wrote:
> diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c
> index 61623e2ff149..11ee24e06d12 100644
> --- a/drivers/cpufreq/scmi-cpufreq.c
> +++ b/drivers/cpufreq/scmi-cpufreq.c
> @@ -103,17 +103,12 @@ scmi_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
>  }
>  
>  static int __maybe_unused
> -scmi_get_cpu_power(unsigned long *power, unsigned long *KHz, int cpu)
> +scmi_get_cpu_power(unsigned long *power, unsigned long *KHz,
> +		   struct device *cpu_dev)
>  {
> -	struct device *cpu_dev = get_cpu_device(cpu);
>  	unsigned long Hz;
>  	int ret, domain;
>  
> -	if (!cpu_dev) {
> -		pr_err("failed to get cpu%d device\n", cpu);
> -		return -ENODEV;
> -	}
> -
>  	domain = handle->perf_ops->device_domain_id(cpu_dev);
>  	if (domain < 0)
>  		return domain;
> @@ -200,7 +195,7 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
>  
>  	policy->fast_switch_possible = true;
>  
> -	em_register_perf_domain(policy->cpus, nr_opp, &em_cb);

So this one has no users after this patch right? I suppose you could
squash patch 05 in this one. But no big deal.

Acked-by: Quentin Perret <qperret@...gle.com>

> +	em_dev_register_perf_domain(cpu_dev, nr_opp, &em_cb, policy->cpus);
>  
>  	return 0;