cpuidle: move driver's refcount to cpuidle
We want to support different cpuidle drivers co-existing together.
In this case we should move the refcount to the cpuidle_driver
structure to handle several drivers at a time.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpuidle/driver.c b/drivers/cpuidle/driver.c
index 87db387..39ba8e1 100644
--- a/drivers/cpuidle/driver.c
+++ b/drivers/cpuidle/driver.c
@@ -16,7 +16,6 @@
static struct cpuidle_driver *cpuidle_curr_driver;
DEFINE_SPINLOCK(cpuidle_driver_lock);
-int cpuidle_driver_refcount;
static void set_power_states(struct cpuidle_driver *drv)
{
@@ -61,6 +60,8 @@
if (!drv->power_specified)
set_power_states(drv);
+ drv->refcnt = 0;
+
cpuidle_curr_driver = drv;
spin_unlock(&cpuidle_driver_lock);
@@ -92,7 +93,7 @@
spin_lock(&cpuidle_driver_lock);
- if (!WARN_ON(cpuidle_driver_refcount > 0))
+ if (!WARN_ON(drv->refcnt > 0))
cpuidle_curr_driver = NULL;
spin_unlock(&cpuidle_driver_lock);
@@ -106,7 +107,7 @@
spin_lock(&cpuidle_driver_lock);
drv = cpuidle_curr_driver;
- cpuidle_driver_refcount++;
+ drv->refcnt++;
spin_unlock(&cpuidle_driver_lock);
return drv;
@@ -114,10 +115,12 @@
void cpuidle_driver_unref(void)
{
+ struct cpuidle_driver *drv = cpuidle_curr_driver;
+
spin_lock(&cpuidle_driver_lock);
- if (!WARN_ON(cpuidle_driver_refcount <= 0))
- cpuidle_driver_refcount--;
+ if (drv && !WARN_ON(drv->refcnt <= 0))
+ drv->refcnt--;
spin_unlock(&cpuidle_driver_lock);
}