[v3,7/8] PM / Domains: Add lockdep asserts for domains list mutex

Commit Message

Krzysztof Kozlowski June 28, 2017, 2:56 p.m. UTC

Add lockdep checks for holding mutex protecting the list of domains.
This might expose misuse even though only file-scope functions use it
for now.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
---
 drivers/base/power/domain.c | 6 ++++++
 1 file changed, 6 insertions(+)

Patch

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index be34cbf3793e..1a47c5ff6a2f 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -726,6 +726,8 @@  static bool pm_genpd_present(const struct generic_pm_domain *genpd)
 {
 	const struct generic_pm_domain *gpd;
 
+	lockdep_assert_held(&gpd_list_lock);
+
 	if (IS_ERR_OR_NULL(genpd))
 		return false;
 
@@ -1321,6 +1323,8 @@  static int genpd_add_subdomain(struct generic_pm_domain *genpd,
 	struct gpd_link *link, *itr;
 	int ret = 0;
 
+	lockdep_assert_held(&gpd_list_lock);
+
 	if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain)
 	    || genpd == subdomain)
 		return -EINVAL;
@@ -1528,6 +1532,8 @@  static int genpd_remove(struct generic_pm_domain *genpd)
 {
 	struct gpd_link *l, *link;
 
+	lockdep_assert_held(&gpd_list_lock);
+
 	if (IS_ERR_OR_NULL(genpd))
 		return -EINVAL;