PM / Domains: Ensure subdomain is not in use before removing
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>
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@ -1473,6 +1473,13 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
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mutex_lock(&genpd->lock);
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if (!list_empty(&subdomain->slave_links) || subdomain->device_count) {
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pr_warn("%s: unable to remove subdomain %s\n", genpd->name,
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subdomain->name);
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ret = -EBUSY;
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goto out;
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}
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list_for_each_entry(link, &genpd->master_links, master_node) {
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if (link->slave != subdomain)
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continue;
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@ -1491,6 +1498,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
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break;
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}
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out:
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mutex_unlock(&genpd->lock);
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return ret;
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