PM / Domains: Verify the PM domain is present when adding a provider
When a PM domain provider is added, there is currently no way to tell if
any PM domains associated with the provider are present. Naturally, the
PM domain provider should not be registered if the PM domains have not
been added. Nonetheless, verify that the PM domain(s) associated with a
provider are present when registering the PM domain provider.
This change adds a dependency on the function pm_genpd_present() when
CONFIG_PM_GENERIC_DOMAINS_OF is enabled and so ensure this function is
available when CONFIG_PM_GENERIC_DOMAINS_OF selected.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index c93aa3a..fc9f11c 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -586,7 +586,7 @@
}
late_initcall(genpd_poweroff_unused);
-#ifdef CONFIG_PM_SLEEP
+#if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM_GENERIC_DOMAINS_OF)
/**
* pm_genpd_present - Check if the given PM domain has been initialized.
@@ -606,6 +606,10 @@
return false;
}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+
static bool genpd_dev_active_wakeup(struct generic_pm_domain *genpd,
struct device *dev)
{
@@ -1453,7 +1457,19 @@
int of_genpd_add_provider_simple(struct device_node *np,
struct generic_pm_domain *genpd)
{
- return genpd_add_provider(np, genpd_xlate_simple, genpd);
+ int ret = -EINVAL;
+
+ if (!np || !genpd)
+ return -EINVAL;
+
+ mutex_lock(&gpd_list_lock);
+
+ if (pm_genpd_present(genpd))
+ ret = genpd_add_provider(np, genpd_xlate_simple, genpd);
+
+ mutex_unlock(&gpd_list_lock);
+
+ return ret;
}
EXPORT_SYMBOL_GPL(of_genpd_add_provider_simple);
@@ -1465,7 +1481,26 @@
int of_genpd_add_provider_onecell(struct device_node *np,
struct genpd_onecell_data *data)
{
- return genpd_add_provider(np, genpd_xlate_onecell, data);
+ unsigned int i;
+ int ret;
+
+ if (!np || !data)
+ return -EINVAL;
+
+ mutex_lock(&gpd_list_lock);
+
+ for (i = 0; i < data->num_domains; i++) {
+ if (!pm_genpd_present(data->domains[i])) {
+ mutex_unlock(&gpd_list_lock);
+ return -EINVAL;
+ }
+ }
+
+ ret = genpd_add_provider(np, genpd_xlate_onecell, data);
+
+ mutex_unlock(&gpd_list_lock);
+
+ return ret;
}
EXPORT_SYMBOL_GPL(of_genpd_add_provider_onecell);