lkml.org 
[lkml]   [2015]   [Jul]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [PATCH] thermal: cpu_cooling: Iterate over all CPUs in clip_cpu mask to get frequency table
On 01-07-15, 12:13, Pi-Cheng Chen wrote:
> Sorry for the mistake I made when cherry-picking the patch. Fix and resend
> again.

You really want above to show up in git logs ?

Any comments like this should be present:
- in cover-letter
- OR after the three dashes below ---
- OR must be followed with a scissors line, like this:
--------------8<--------

> __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>
> ---
> 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));

Nah, that's wrong. I hope that's a hypothetical problem and not a real
one. Would have been better if cpufreq maintainers were cc'd as they
can provide more insight into this :)

cpufreq_frequency_get_table() does: policy->freq_table and so it
doesn't matter if the cpu is online or not.

cpufreq_cpu_data was getting unset earlier on hotplug, but that's not
the case anymore. So nothing to worry about :)

--
viresh


\
 
 \ /
  Last update: 2015-07-07 12:41    [W:0.100 / U:0.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site