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-rw-r--r--drivers/cpuidle/driver.c13
-rw-r--r--include/linux/cpuidle.h1
2 files changed, 9 insertions, 5 deletions
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 @@ int cpuidle_register_driver(struct cpuidle_driver *drv)
if (!drv->power_specified)
set_power_states(drv);
+ drv->refcnt = 0;
+
cpuidle_curr_driver = drv;
spin_unlock(&cpuidle_driver_lock);
@@ -92,7 +93,7 @@ void cpuidle_unregister_driver(struct cpuidle_driver *drv)
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 @@ struct cpuidle_driver *cpuidle_driver_ref(void)
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 @@ struct cpuidle_driver *cpuidle_driver_ref(void)
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);
}
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index 7daf0e3..d08e1af 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -124,6 +124,7 @@ static inline int cpuidle_get_last_residency(struct cpuidle_device *dev)
struct cpuidle_driver {
const char *name;
struct module *owner;
+ int refcnt;
unsigned int power_specified:1;
/* set to 1 to use the core cpuidle time keeping (for all states). */
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