| Message ID | 20220615144321.262773-5-pierre.gondois@arm.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | cpufreq: qcom-hw: LMH irq/hotplug interractions | expand |
On 15-06-22, 16:43, Pierre Gondois wrote: > >From a state where all policy->related_cpus are offline, putting one > of the policy's CPU back online re-activates the policy by: > 1. Calling cpufreq_driver->online() > 2. Setting the CPU in policy->cpus > > qcom_cpufreq_hw_cpu_online() makes use of policy->cpus. Thus 1. and 2. > should be inverted to avoid having a policy->cpus empty. The > qcom-cpufreq-hw is the only driver affected by this. > > Fixes: a1eb080a0447 ("cpufreq: qcom-hw: provide online/offline operations") > Signed-off-by: Pierre Gondois <pierre.gondois@arm.com> > --- > drivers/cpufreq/cpufreq.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c > index 2cad42774164..36043be16d8e 100644 > --- a/drivers/cpufreq/cpufreq.c > +++ b/drivers/cpufreq/cpufreq.c > @@ -1350,15 +1350,15 @@ static int cpufreq_online(unsigned int cpu) > } > > if (!new_policy && cpufreq_driver->online) { > + /* Recover policy->cpus using related_cpus */ > + cpumask_copy(policy->cpus, policy->related_cpus); > + > ret = cpufreq_driver->online(policy); > if (ret) { > pr_debug("%s: %d: initialization failed\n", __func__, > __LINE__); > goto out_exit_policy; > } > - > - /* Recover policy->cpus using related_cpus */ > - cpumask_copy(policy->cpus, policy->related_cpus); > } else { > cpumask_copy(policy->cpus, cpumask_of(cpu)); Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 2cad42774164..36043be16d8e 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1350,15 +1350,15 @@ static int cpufreq_online(unsigned int cpu) } if (!new_policy && cpufreq_driver->online) { + /* Recover policy->cpus using related_cpus */ + cpumask_copy(policy->cpus, policy->related_cpus); + ret = cpufreq_driver->online(policy); if (ret) { pr_debug("%s: %d: initialization failed\n", __func__, __LINE__); goto out_exit_policy; } - - /* Recover policy->cpus using related_cpus */ - cpumask_copy(policy->cpus, policy->related_cpus); } else { cpumask_copy(policy->cpus, cpumask_of(cpu));
From a state where all policy->related_cpus are offline, putting one of the policy's CPU back online re-activates the policy by: 1. Calling cpufreq_driver->online() 2. Setting the CPU in policy->cpus qcom_cpufreq_hw_cpu_online() makes use of policy->cpus. Thus 1. and 2. should be inverted to avoid having a policy->cpus empty. The qcom-cpufreq-hw is the only driver affected by this. Fixes: a1eb080a0447 ("cpufreq: qcom-hw: provide online/offline operations") Signed-off-by: Pierre Gondois <pierre.gondois@arm.com> --- drivers/cpufreq/cpufreq.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)