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cpuidle: move driver's refcount to cpuidle

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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 <[email protected]>
Acked-by: Peter De Schrijver <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Daniel Lezcano 2012-10-31 16:44:45 +00:00 • committed by Rafael J. Wysocki
commit 42f67f2aca
2 changed files with 9 additions and 5 deletions
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13
drivers/cpuidle/driver.c
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@ -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);
}