The function pm_genpd_remove_subdomain() removes a subdomain from a
generic PM domain, however, it does not check if the subdomain has any
slave domains or device attached before doing so. Therefore, add a test
to verify that the subdomain does not have any slave domains associated
or any device attached before removing.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
mutex_lock(&genpd->lock);
+ if (!list_empty(&subdomain->slave_links) || subdomain->device_count) {
+ pr_warn("%s: unable to remove subdomain %s\n", genpd->name,
+ subdomain->name);
+ ret = -EBUSY;
+ goto out;
+ }
+
list_for_each_entry(link, &genpd->master_links, master_node) {
if (link->slave != subdomain)
continue;
break;
}
+out:
mutex_unlock(&genpd->lock);
return ret;