Re: [PATCH] thermal: cpu_cooling: Iterate over all CPUs in clip_cpu mask to get frequency table

[Javi Merino <javi.merino@arm.com>]

On Wed, Jul 01, 2015 at 05:13:14AM +0100, Pi-Cheng Chen wrote:
> Sorry for the mistake I made when cherry-picking the patch. Fix and resend
> again.
> 
> __cpufreq_cooling_register() might fail if some CPU other than first one in
> clip_cpu mask is present earlier e.g. CPU hotplug. Iterate all CPUs in the mask
> to handle this case.
> 
> Signed-off-by: Pi-Cheng Chen <pi-cheng.chen@linaro.org>

Looks good to me.  FWIW,

Acked-by: Javi Merino <javi.merino@arm.com>

> ---
>  drivers/thermal/cpu_cooling.c | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
> index 6509c61..5e90eb6 100644
> --- a/drivers/thermal/cpu_cooling.c
> +++ b/drivers/thermal/cpu_cooling.c
> @@ -776,9 +776,14 @@ __cpufreq_cooling_register(struct device_node *np,
>  	char dev_name[THERMAL_NAME_LENGTH];
>  	struct cpufreq_frequency_table *pos, *table;
>  	unsigned int freq, i, num_cpus;
> -	int ret;
> +	int ret, cpu;
> +
> +	for_each_cpu(cpu, clip_cpus) {
> +		table = cpufreq_frequency_get_table(cpu);
> +		if (table)
> +			break;
> +	}
>  
> -	table = cpufreq_frequency_get_table(cpumask_first(clip_cpus));
>  	if (!table) {
>  		pr_debug("%s: CPUFreq table not found\n", __func__);
>  		return ERR_PTR(-EPROBE_DEFER);
> -- 
> 1.9.1
> 
> 
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