Re: [PATCH 1/2] cpufreq: Notify all policy->cpus in cpufreq_notify_transition()

[Viresh Kumar <viresh.kumar@linaro.org>]

On 24 March 2013 19:18, Viresh Kumar <viresh.kumar@linaro.org> wrote:
> policy->cpus contains all online cpus that have single shared clock line. And
> their frequencies are always updated together.
>
> Many SMP system's cpufreq drivers take care of this in individual drivers but
> the best place for this code is in cpufreq core.
>
> This patch modifies cpufreq_notify_transition() to notify frequency change for
> all cpus in policy->cpus and hence updates all users of this API.

Another fixup for tegra:

diff --git a/arch/arm/mach-tegra/cpu-tegra.c b/arch/arm/mach-tegra/cpu-tegra.c
index 3b441d6..11ca730 100644
--- a/arch/arm/mach-tegra/cpu-tegra.c
+++ b/arch/arm/mach-tegra/cpu-tegra.c
@@ -106,7 +106,8 @@ out:
        return ret;
 }

-static int tegra_update_cpu_speed(unsigned long rate)
+static int tegra_update_cpu_speed(struct cpufreq_policy *policy,
+               unsigned long rate)
 {
        int ret = 0;
        struct cpufreq_freqs freqs;
@@ -179,7 +180,7 @@ static int tegra_target(struct cpufreq_policy *policy,

        target_cpu_speed[policy->cpu] = freq;

-       ret = tegra_update_cpu_speed(tegra_cpu_highest_speed());
+       ret = tegra_update_cpu_speed(policy, tegra_cpu_highest_speed());

 out:
        mutex_unlock(&tegra_cpu_lock);
@@ -191,10 +192,12 @@ static int tegra_pm_notify(struct notifier_block
*nb, unsigned long event,
 {
        mutex_lock(&tegra_cpu_lock);
        if (event == PM_SUSPEND_PREPARE) {
+               struct cpufreq_policy *policy = cpufreq_cpu_get(0);
                is_suspended = true;
                pr_info("Tegra cpufreq suspend: setting frequency to %d kHz\n",
                        freq_table[0].frequency);
-               tegra_update_cpu_speed(freq_table[0].frequency);
+               tegra_update_cpu_speed(policy, freq_table[0].frequency);
+               cpufreq_cpu_put(policy);
        } else if (event == PM_POST_SUSPEND) {
                is_suspended = false;
        }