The previous coordination type handling in the cppc_cpufreq init code created some confusion: the comment mentioned "Support only SW_ANY for now" while only the SW_ALL/ALL case resulted in a failure. The other coordination types (HW_ALL/HW, NONE) were silently supported.
Clarify support for coordination types while describing in comments the intended behavior. Signed-off-by: Ionela Voinescu <[email protected]> Acked-by: Viresh Kumar <[email protected]> Cc: Rafael J. Wysocki <[email protected]> Cc: Viresh Kumar <[email protected]> --- drivers/cpufreq/cppc_cpufreq.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index 2700fc71d4e8..f15a44c8b6b7 100644 --- a/drivers/cpufreq/cppc_cpufreq.c +++ b/drivers/cpufreq/cppc_cpufreq.c @@ -244,7 +244,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy) struct cppc_cpudata *cpu_data = all_cpu_data[policy->cpu]; struct cppc_perf_caps *caps = &cpu_data->perf_caps; unsigned int cpu = policy->cpu; - int ret = 0; + int i, ret = 0; cpu_data->cpu = cpu; ret = cppc_get_perf_caps(cpu, caps); @@ -281,9 +281,13 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy) policy->transition_delay_us = cppc_cpufreq_get_transition_delay_us(cpu); policy->shared_type = cpu_data->shared_type; - if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) { - int i; - + switch (policy->shared_type) { + case CPUFREQ_SHARED_TYPE_HW: + case CPUFREQ_SHARED_TYPE_NONE: + /* Nothing to be done - we'll have a policy for each CPU */ + break; + case CPUFREQ_SHARED_TYPE_ANY: + /* All CPUs in the domain will share a policy */ cpumask_copy(policy->cpus, cpu_data->shared_cpu_map); for_each_cpu(i, policy->cpus) { @@ -293,9 +297,10 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy) memcpy(&all_cpu_data[i]->perf_caps, caps, sizeof(cpu_data->perf_caps)); } - } else if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL) { - /* Support only SW_ANY for now. */ - pr_debug("Unsupported CPU co-ord type\n"); + break; + default: + pr_debug("Unsupported CPU co-ord type: %d\n", + policy->shared_type); return -EFAULT; } -- 2.29.2.dirty
