@@ -418,8 +418,21 @@ static ssize_t cpuidle_state_store(struct kobject *kobj, struct attribute *attr,
struct cpuidle_state_attr *cattr = attr_to_stateattr(attr);
struct cpuidle_device *dev = kobj_to_device(kobj);
- if (cattr->store)
+ if (cattr->store) {
ret = cattr->store(state, state_usage, buf, size);
+ if (ret == size &&
+ strncmp(cattr->attr.name, "disable",
+ strlen("disable"))) {
+ struct kobject *cpuidle_kobj = kobj->parent;
+ struct cpuidle_device *dev =
+ to_cpuidle_device(cpuidle_kobj);
+ struct cpuidle_driver *drv =
+ cpuidle_get_cpu_driver(dev);
+
+ if (drv->disable_callback)
+ drv->disable_callback(dev, drv);
+ }
+ }
/* reset poll time cache */
dev->poll_limit_ns = 0;
@@ -122,6 +122,9 @@ struct cpuidle_driver {
/* the driver handles the cpus in cpumask */
struct cpumask *cpumask;
+ void (*disable_callback)(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv);
+
/* preferred governor to switch at register time */
const char *governor;
};
To force wakeup a cpu, we need to compute the timeout in the fast idle path as a state may be enabled or disabled but there did not exist a feedback to driver when a state is enabled or disabled. This patch adds a callback whenever a state_usage records a store for disable attribute Signed-off-by: Abhishek Goel <huntbag@linux.vnet.ibm.com> --- drivers/cpuidle/sysfs.c | 15 ++++++++++++++- include/linux/cpuidle.h | 3 +++ 2 files changed, 17 insertions(+), 1 deletion(-)