linux-kernel - Re: [PATCH v2] cpufreq: imx: update the clock switch flow to support imx6ul

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Date:	Mon, 05 Oct 2015 22:49:32 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Bai Ping <b51503@...escale.com>
Cc:	Viresh Kumar <viresh.kumar@...aro.org>, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] cpufreq: imx: update the clock switch flow to support imx6ul

On Friday, September 11, 2015 04:38:05 PM Bai Ping wrote:
> 
> On 2015/9/11 16:07, Viresh Kumar wrote:
> > On 11-09-15, 23:41, Bai Ping wrote:
> >> +	if (of_machine_is_compatible("fsl,imx6ul")) {
> >> +		pll2_bus_clk = clk_get(cpu_dev, "pll2_bus");
> >> +		secondary_sel_clk = clk_get(cpu_dev, "secondary_sel");
> >> +		if (IS_ERR(pll2_bus_clk) || IS_ERR(secondary_sel_clk)) {
> >> +			dev_err(cpu_dev, "failed to get clocks specific to imx6ul\n");
> >> +			ret = -ENOENT;
> >> +			goto put_clk;
> >> +		}
> >> +	}
> >> +
> >>   	arm_reg = regulator_get(cpu_dev, "arm");
> >>   	pu_reg = regulator_get_optional(cpu_dev, "pu");
> >>   	soc_reg = regulator_get(cpu_dev, "soc");
> >> @@ -331,6 +365,10 @@ put_clk:
> >>   		clk_put(step_clk);
> >>   	if (!IS_ERR(pll2_pfd2_396m_clk))
> >>   		clk_put(pll2_pfd2_396m_clk);
> >> +	if (!IS_ERR(pll2_bus_clk))
> >> +		clk_put(pll2_bus_clk);
> >> +	if (!IS_ERR(secondary_sel_clk))
> >> +		clk_put(secondary_sel_clk);
> >>   	of_node_put(np);
> >>   	return ret;
> >>   }
> > As part of good coding practices, you should free resources in the
> > reverse order to which they were allocated. The clocks don't follow
> > that, but its not a problem with just your patch. That's how it is
> > present today. Maybe you can write another patch to fix that.
> 
> thanks for your suggestion, I will pay more attention to it in future 
> coding.
> 
> > Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

Patch applied, thanks!

Rafael

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