cpufreq: CPPC: Initialize and check CPUFreq CPU co-ord type correctly

The CPU policy struct indicates the co-ordination type
for all CPUs of a common freq domain. Initialize it
correctly using the CPU specific data gathered from
CPPC ACPI lib via acpi_get_psd_map().

The PSD object is optional, so the cpu->shared_type
can also be 0. So instead of assuming any value other
than SW_ANY(0xFD) is unsupported, explictly check
if shared_type is SW_ALL and then bail.

Signed-off-by: Ashwin Chaugule <ashwin.chaugule@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index e8cb334094b0d5d89df7d8f482515f7901ac28f5..7c0bdfb1a2ca47ea9dcd0b36ef892274edd929b4 100644 (file)
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -98,10 +98,11 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
        policy->max = cpu->perf_caps.highest_perf;
        policy->cpuinfo.min_freq = policy->min;
        policy->cpuinfo.max_freq = policy->max;
+       policy->shared_type = cpu->shared_type;
 
        if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)
                cpumask_copy(policy->cpus, cpu->shared_cpu_map);
-       else {
+       else if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL) {
                /* Support only SW_ANY for now. */
                pr_debug("Unsupported CPU co-ord type\n");
                return -EFAULT;