/**
* genpd_queue_power_off_work - Queue up the execution of genpd_poweroff().
- * @genpd: PM domait to power off.
+ * @genpd: PM domain to power off.
*
* Queue up the execution of genpd_poweroff() unless it's already been done
* before.
queue_work(pm_wq, &genpd->power_off_work);
}
-static int genpd_poweron(struct generic_pm_domain *genpd);
-
/**
* __genpd_poweron - Restore power to a given PM domain and its masters.
* @genpd: PM domain to power up.
+ * @depth: nesting count for lockdep.
*
* Restore power to @genpd and all of its masters so that it is possible to
* resume a device belonging to it.
*/
-static int __genpd_poweron(struct generic_pm_domain *genpd)
+static int __genpd_poweron(struct generic_pm_domain *genpd, unsigned int depth)
{
struct gpd_link *link;
int ret = 0;
* with it.
*/
list_for_each_entry(link, &genpd->slave_links, slave_node) {
- genpd_sd_counter_inc(link->master);
+ struct generic_pm_domain *master = link->master;
+
+ genpd_sd_counter_inc(master);
+
+ mutex_lock_nested(&master->lock, depth + 1);
+ ret = __genpd_poweron(master, depth + 1);
+ mutex_unlock(&master->lock);
- ret = genpd_poweron(link->master);
if (ret) {
- genpd_sd_counter_dec(link->master);
+ genpd_sd_counter_dec(master);
goto err;
}
}
int ret;
mutex_lock(&genpd->lock);
- ret = __genpd_poweron(genpd);
+ ret = __genpd_poweron(genpd, 0);
mutex_unlock(&genpd->lock);
return ret;
}
+
static int genpd_save_dev(struct generic_pm_domain *genpd, struct device *dev)
{
return GENPD_DEV_CALLBACK(genpd, int, save_state, dev);
}
mutex_lock(&genpd->lock);
- ret = __genpd_poweron(genpd);
+ ret = __genpd_poweron(genpd, 0);
mutex_unlock(&genpd->lock);
if (ret)
if (!link)
return -ENOMEM;
- mutex_lock(&genpd->lock);
- mutex_lock_nested(&subdomain->lock, SINGLE_DEPTH_NESTING);
+ mutex_lock(&subdomain->lock);
+ mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING);
if (genpd->status == GPD_STATE_POWER_OFF
&& subdomain->status != GPD_STATE_POWER_OFF) {
genpd_sd_counter_inc(genpd);
out:
- mutex_unlock(&subdomain->lock);
mutex_unlock(&genpd->lock);
+ mutex_unlock(&subdomain->lock);
if (ret)
kfree(link);
return ret;
if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain))
return -EINVAL;
- mutex_lock(&genpd->lock);
+ mutex_lock(&subdomain->lock);
+ mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING);
if (!list_empty(&subdomain->slave_links) || subdomain->device_count) {
pr_warn("%s: unable to remove subdomain %s\n", genpd->name,
if (link->slave != subdomain)
continue;
- mutex_lock_nested(&subdomain->lock, SINGLE_DEPTH_NESTING);
-
list_del(&link->master_node);
list_del(&link->slave_node);
kfree(link);
if (subdomain->status != GPD_STATE_POWER_OFF)
genpd_sd_counter_dec(genpd);
- mutex_unlock(&subdomain->lock);
-
ret = 0;
break;
}
out:
mutex_unlock(&genpd->lock);
+ mutex_unlock(&subdomain->lock);
return ret;
}