With the addition of following patch:
fcf8058 cpufreq: Simplify cpufreq_add_dev()
cpufreq driver's .init() routine must initialize policy->cpus with mask of all possible cpus (Online + Offline) that share the clock. Then the core would copy this mask onto policy->related_cpus and will reset policy->cpus to carry only online cpus.
acpi-cpufreq driver wasn't updated with this assumption and so sometimes when we try to hot[un]plug cpus at run time, sysfs directories gets corrupted.
This patch fixes acpi-cpufreq driver against this corruption.
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org Tested-by: Maciej Rutecki maciej.rutecki@gmail.com --- drivers/cpufreq/acpi-cpufreq.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index afbef9c..11b8b4b 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -723,7 +723,6 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) { cpumask_copy(policy->cpus, perf->shared_cpu_map); } - cpumask_copy(policy->related_cpus, perf->shared_cpu_map);
#ifdef CONFIG_SMP dmi_check_system(sw_any_bug_dmi_table); @@ -735,7 +734,6 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) if (check_amd_hwpstate_cpu(cpu) && !acpi_pstate_strict) { cpumask_clear(policy->cpus); cpumask_set_cpu(cpu, policy->cpus); - cpumask_copy(policy->related_cpus, cpu_sibling_mask(cpu)); policy->shared_type = CPUFREQ_SHARED_TYPE_HW; pr_info_once(PFX "overriding BIOS provided _PSD data\n"); }