cpufreq: Introduce cpufreq_update_current_freq()

Move the part of cpufreq_update_policy() that obtains the current
frequency from the driver and updates policy->cur if necessary to
a separate function, cpufreq_get_current_freq().

That should not introduce functional changes and subsequent change
set will need it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 43f3912..ffdb7fc 100644 (file)
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1487,6 +1487,24 @@ unsigned int cpufreq_get(unsigned int cpu)
 }
 EXPORT_SYMBOL(cpufreq_get);
 
+static unsigned int cpufreq_update_current_freq(struct cpufreq_policy *policy)
+{
+       unsigned int new_freq;
+
+       new_freq = cpufreq_driver->get(policy->cpu);
+       if (!new_freq)
+               return 0;
+
+       if (!policy->cur) {
+               pr_debug("cpufreq: Driver did not initialize current freq\n");
+               policy->cur = new_freq;
+       } else if (policy->cur != new_freq && has_target()) {
+               cpufreq_out_of_sync(policy, new_freq);
+       }
+
+       return new_freq;
+}
+
 static struct subsys_interface cpufreq_interface = {
        .name           = "cpufreq",
        .subsys         = &cpu_subsys,
@@ -2152,19 +2170,11 @@ int cpufreq_update_policy(unsigned int cpu)
         * -> ask driver for current freq and notify governors about a change
         */
        if (cpufreq_driver->get && !cpufreq_driver->setpolicy) {
-               new_policy.cur = cpufreq_driver->get(cpu);
+               new_policy.cur = cpufreq_update_current_freq(policy);
                if (WARN_ON(!new_policy.cur)) {
                        ret = -EIO;
                        goto unlock;
                }
-
-               if (!policy->cur) {
-                       pr_debug("Driver did not initialize current freq\n");
-                       policy->cur = new_policy.cur;
-               } else {
-                       if (policy->cur != new_policy.cur && has_target())
-                               cpufreq_out_of_sync(policy, new_policy.cur);
-               }
        }
 
        ret = cpufreq_set_policy(policy, &new_policy);