[PATCH 14/14] cpufreq: intel_pstate: Introduce pid_in_use()

[Rafael J. Wysocki]

From: Rafael J. Wysocki <rafael.j.wyso...@intel.com>

Add a new function pid_in_use() to return the information on whether
or not the PID-based P-state selection algorithm is in use.

That allows a couple of complicated conditions in the code to be
reduced to simple checks against the new function's return value.

Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
---
 drivers/cpufreq/intel_pstate.c |   16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

Index: linux-pm/drivers/cpufreq/intel_pstate.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/intel_pstate.c
+++ linux-pm/drivers/cpufreq/intel_pstate.c
@@ -1949,6 +1949,8 @@ static const struct x86_cpu_id intel_pst
        {}
 };
 
+static bool pid_in_use(void);
+
 static int intel_pstate_init_cpu(unsigned int cpunum)
 {
        struct cpudata *cpu;
@@ -1986,7 +1988,7 @@ static int intel_pstate_init_cpu(unsigne
                        intel_pstate_disable_ee(cpunum);
 
                intel_pstate_hwp_enable(cpu);
-       } else if (pstate_funcs.update_util == intel_pstate_update_util_pid) {
+       } else if (pid_in_use()) {
                intel_pstate_pid_reset(cpu);
        }
 
@@ -2360,6 +2362,12 @@ static struct cpufreq_driver intel_cpufr
 
 static struct cpufreq_driver *default_driver = &intel_pstate;
 
+static bool pid_in_use(void)
+{
+       return intel_pstate_driver == &intel_pstate &&
+               pstate_funcs.update_util == intel_pstate_update_util_pid;
+}
+
 static void intel_pstate_driver_cleanup(void)
 {
        unsigned int cpu;
@@ -2397,8 +2405,7 @@ static int intel_pstate_register_driver(
                return ret;
        }
 
-       if (intel_pstate_driver == &intel_pstate && !hwp_active &&
-           pstate_funcs.update_util == intel_pstate_update_util_pid)
+       if (pid_in_use())
                intel_pstate_debug_expose_params();
 
        return 0;
@@ -2409,8 +2416,7 @@ static int intel_pstate_unregister_drive
        if (hwp_active)
                return -EBUSY;
 
-       if (intel_pstate_driver == &intel_pstate &&
-           pstate_funcs.update_util == intel_pstate_update_util_pid)
+       if (pid_in_use())
                intel_pstate_debug_hide_params();
 
        cpufreq_unregister_driver(intel_pstate_driver);