linux-kernel - Re: [PATCH 04/13] cpufreq: qcom: Refactor the driver to make it easier to extend

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Date:   Wed, 10 Jul 2019 12:00:26 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Niklas Cassel <niklas.cassel@...aro.org>
Cc:     Andy Gross <agross@...nel.org>, Ilia Lin <ilia.lin@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        linux-arm-msm@...r.kernel.org, jorge.ramirez-ortiz@...aro.org,
        sboyd@...nel.org, vireshk@...nel.org, bjorn.andersson@...aro.org,
        ulf.hansson@...aro.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/13] cpufreq: qcom: Refactor the driver to make it
 easier to extend

On 05-07-19, 11:57, Niklas Cassel wrote:
> +	drv->opp_tables = kcalloc(num_possible_cpus(), sizeof(*drv->opp_tables),
> +				  GFP_KERNEL);
> +	if (!drv->opp_tables) {
> +		ret = -ENOMEM;
> +		goto free_drv;
> +	}
>  
>  	for_each_possible_cpu(cpu) {
>  		cpu_dev = get_cpu_device(cpu);
> @@ -166,19 +195,23 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
>  			goto free_opp;
>  		}
>  
> -		opp_tables[cpu] = dev_pm_opp_set_supported_hw(cpu_dev,
> -							      &versions, 1);
> -		if (IS_ERR(opp_tables[cpu])) {
> -			ret = PTR_ERR(opp_tables[cpu]);
> -			dev_err(cpu_dev, "Failed to set supported hardware\n");
> -			goto free_opp;
> +		if (drv->data->get_version) {

Why depend on get_version here ? The OPP table is already allocated
unconditionally.

> +			drv->opp_tables[cpu] =
> +				dev_pm_opp_set_supported_hw(cpu_dev,
> +							    &drv->versions, 1);
> +			if (IS_ERR(drv->opp_tables[cpu])) {
> +				ret = PTR_ERR(drv->opp_tables[cpu]);
> +				dev_err(cpu_dev,
> +					"Failed to set supported hardware\n");
> +				goto free_opp;
> +			}
>  		}
>  	}

-- 
viresh