cpuidle_driver_lock is taken correctly at most of the places but at few places
calls to cpuidle_get_driver() are done from outside of this lock.
Fix them by calling cpuidle_get_driver() after taking cpuidle_driver_lock.
Acked-by: Daniel Lezcano <daniel.lezc...@linaro.org>
Signed-off-by: Viresh Kumar <viresh.ku...@linaro.org>
---
drivers/cpuidle/driver.c | 3 ++-
drivers/cpuidle/sysfs.c | 3 ++-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/cpuidle/driver.c b/drivers/cpuidle/driver.c
index 58077a9..662d934 100644
--- a/drivers/cpuidle/driver.c
+++ b/drivers/cpuidle/driver.c
@@ -338,10 +338,11 @@ struct cpuidle_driver *cpuidle_driver_ref(void)
*/
void cpuidle_driver_unref(void)
{
- struct cpuidle_driver *drv = cpuidle_get_driver();
+ struct cpuidle_driver *drv;
spin_lock(&cpuidle_driver_lock);
+ drv = cpuidle_get_driver();
if (drv && !WARN_ON(drv->refcnt <= 0))
drv->refcnt--;
diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
index 8739cc0..a022393 100644
--- a/drivers/cpuidle/sysfs.c
+++ b/drivers/cpuidle/sysfs.c
@@ -52,9 +52,10 @@ static ssize_t show_current_driver(struct device *dev,
char *buf)
{
ssize_t ret;
- struct cpuidle_driver *cpuidle_driver = cpuidle_get_driver();
+ struct cpuidle_driver *cpuidle_driver;
spin_lock(&cpuidle_driver_lock);
+ cpuidle_driver = cpuidle_get_driver();
if (cpuidle_driver)
ret = sprintf(buf, "%s\n", cpuidle_driver->name);
else
--
1.7.12.rc2.18.g61b472e
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