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topology: Set capacity_freq_ref in all cases 

If "capacity-dmips-mhz" is not set, raw_capacity is null and we skip the
normalization step which includes setting per_cpu capacity_freq_ref.
Always register the notifier but skip the capacity normalization if
raw_capacity is null.

Fixes: 9942cb22ea ("sched/topology: Add a new arch_scale_freq_ref() method")
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Pierre Gondois <pierre.gondois@arm.com>
Tested-by: Mark Brown <broonie@kernel.org>
Tested-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://lore.kernel.org/r/20240117190545.596057-1-vincent.guittot@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vincent Guittot 2024-01-17 20:05:45 +01:00 committed by Greg Kroah-Hartman
parent 41bccc98fb
commit 98323e9d70
1 changed files with 6 additions and 7 deletions
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13
drivers/base/arch_topology.c
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@ -431,9 +431,6 @@ init_cpu_capacity_callback(struct notifier_block *nb,
struct cpufreq_policy *policy = data;
int cpu;
if (!raw_capacity)
return 0;
if (val != CPUFREQ_CREATE_POLICY)
return 0;
@ -450,9 +447,11 @@ init_cpu_capacity_callback(struct notifier_block *nb,
}
if (cpumask_empty(cpus_to_visit)) {
topology_normalize_cpu_scale();
schedule_work(&update_topology_flags_work);
free_raw_capacity();
if (raw_capacity) {
topology_normalize_cpu_scale();
schedule_work(&update_topology_flags_work);
free_raw_capacity();
}
pr_debug("cpu_capacity: parsing done\n");
schedule_work(&parsing_done_work);
}
@ -472,7 +471,7 @@ static int __init register_cpufreq_notifier(void)
* On ACPI-based systems skip registering cpufreq notifier as cpufreq
* information is not needed for cpu capacity initialization.
*/
if (!acpi_disabled || !raw_capacity)
if (!acpi_disabled)
return -EINVAL;
if (!alloc_cpumask_var(&cpus_to_visit, GFP_KERNEL))