linux-kernel - Re: [PATCH V3 6/6] cpufreq: Loongson1: Add cpufreq driver for Loongson1B

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Date:	Fri, 17 Oct 2014 16:07:50 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Kelvin Cheung <keguang.zhang@...il.com>
Cc:	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>, linux-mips@...ux-mips.org,
	Ralf Baechle <ralf@...ux-mips.org>
Subject: Re: [PATCH V3 6/6] cpufreq: Loongson1: Add cpufreq driver for Loongson1B

On 17 October 2014 15:53, Kelvin Cheung <keguang.zhang@...il.com> wrote:
> This patch adds cpufreq driver for Loongson1B which
> is capable of changing the CPU frequency dynamically.
>
> Signed-off-by: Kelvin Cheung <keguang.zhang@...il.com>
>
> ---
> V3:
>    Remove superfluous devm_clk_put().

Sorry for being bad to you :)

> +static int ls1x_cpufreq_probe(struct platform_device *pdev)
> +{
> +       struct plat_ls1x_cpufreq *pdata = pdev->dev.platform_data;
> +       struct clk *clk;
> +       int ret;
> +
> +       if (!pdata || !pdata->clk_name || !pdata->osc_clk_name)
> +               return -EINVAL;
> +
> +       ls1x_cpufreq.dev = &pdev->dev;
> +
> +       clk = devm_clk_get(&pdev->dev, pdata->clk_name);
> +       if (IS_ERR(clk)) {
> +               dev_err(ls1x_cpufreq.dev, "unable to get %s clock\n",
> +                       pdata->clk_name);
> +               ret = PTR_ERR(clk);
> +               goto out;
> +       }
> +       ls1x_cpufreq.clk = clk;
> +
> +       clk = clk_get_parent(clk);
> +       if (IS_ERR(clk)) {
> +               dev_err(ls1x_cpufreq.dev, "unable to get parent of %s clock\n",
> +                       __clk_get_name(ls1x_cpufreq.clk));
> +               ret = PTR_ERR(clk);
> +               goto out;
> +       }
> +       ls1x_cpufreq.mux_clk = clk;
> +
> +       clk = clk_get_parent(clk);
> +       if (IS_ERR(clk)) {
> +               dev_err(ls1x_cpufreq.dev, "unable to get parent of %s clock\n",
> +                       __clk_get_name(ls1x_cpufreq.mux_clk));
> +               ret = PTR_ERR(clk);
> +               goto out;
> +       }
> +       ls1x_cpufreq.pll_clk = clk;
> +
> +       clk = devm_clk_get(&pdev->dev, pdata->osc_clk_name);
> +       if (IS_ERR(clk)) {
> +               dev_err(ls1x_cpufreq.dev, "unable to get %s clock\n",
> +                       pdata->osc_clk_name);
> +               ret = PTR_ERR(clk);
> +               goto out;
> +       }
> +       ls1x_cpufreq.osc_clk = clk;
> +
> +       ls1x_cpufreq.max_freq = pdata->max_freq;
> +       ls1x_cpufreq.min_freq = pdata->min_freq;
> +
> +       ret = cpufreq_register_driver(&ls1x_cpufreq_driver);
> +       if (ret) {
> +               dev_err(ls1x_cpufreq.dev,
> +                       "failed to register cpufreq driver: %d\n", ret);
> +               goto out;
> +       }
> +
> +       ret = cpufreq_register_notifier(&ls1x_cpufreq_notifier_block,
> +                                       CPUFREQ_TRANSITION_NOTIFIER);
> +
> +       if (!ret)
> +               goto out;
> +
> +       dev_err(ls1x_cpufreq.dev, "failed to register cpufreq notifier: %d\n",
> +               ret);
> +
> +       cpufreq_unregister_driver(&ls1x_cpufreq_driver);
> +out:

But all these goto out; doesn't make sense anymore. Just issue returns
from all places and add

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
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