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SubjectRe: [RFC PATCH] cpufreq: cpufreq-cpu0: do not allow transitions with regulators suspended
Date
On Thursday, November 14, 2013 06:55:05 AM viresh kumar wrote:
> On Wednesday 13 November 2013 08:46 PM, Nishanth Menon wrote:
> > arrgh, my bad.. Apologies for the bad one.. I missed it :( Does the following
> > look equivalent?
>
> yes.
>
> > With this, I now see:
>
> > [ 43.212714] cpufreq: cpufreq_add_policy_cpu: Failed to stop governor
> > ^^^ ??
>
> Ahh, I missed this part. I thought it will fail at some other place where there
> is no error checking :), but that's not true.
>
> Following should fix it for you and looks to be the right way as well.
>
>
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> index dc67fa0..30b09d3 100644
> --- a/drivers/cpufreq/cpufreq.c
> +++ b/drivers/cpufreq/cpufreq.c
> @@ -1530,6 +1530,14 @@ static void cpufreq_bp_resume(void)
> }
> }
>
> + if (has_target()) {
> + if ((ret = __cpufreq_governor(policy, CPUFREQ_GOV_START)) ||
> + (ret = __cpufreq_governor(policy, CPUFREQ_GOV_LIMITS))) {


I'm not going to apply anything like this. If I have already, that's been a mistake.

Do not mix assignments with logical operators in such outrageous ways, please.
That's completely unreadable and confusing.

What about:

ret = __cpufreq_governor(policy, CPUFREQ_GOV_START);
if (!ret) {
ret = __cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
if (ret) {


> + pr_err("%s: Failed to start governor\n", __func__);
> + goto fail;
> + }
> + }
> +
> schedule_work(&policy->update);
>
> fail:

Thanks!

--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.


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