From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Wed, 28 Jun 2017 14:56:19 +0000 (+0200)
Subject: PM / Domains: Fix unsafe iteration over modified list of domain providers
X-Git-Tag: v4.4.79~60
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e114c612e225521043b3b4d3eaaeb41f47bd98a5;p=thirdparty%2Fkernel%2Fstable.git

PM / Domains: Fix unsafe iteration over modified list of domain providers

commit b556b15dc04e9b9b98790f04c21acf5e24f994b2 upstream.

of_genpd_del_provider() iterates over list of domain provides and
removes matching element thus it has to use safe version of list
iteration.

Fixes: aa42240ab254 (PM / Domains: Add generic OF-based PM domain look-up)
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index f25c64587f8ce..3f94e5fc110af 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1642,10 +1642,10 @@ EXPORT_SYMBOL_GPL(__of_genpd_add_provider);
  */
 void of_genpd_del_provider(struct device_node *np)
 {
-	struct of_genpd_provider *cp;
+	struct of_genpd_provider *cp, *tmp;
 
 	mutex_lock(&of_genpd_mutex);
-	list_for_each_entry(cp, &of_genpd_providers, link) {
+	list_for_each_entry_safe(cp, tmp, &of_genpd_providers, link) {
 		if (cp->node == np) {
 			list_del(&cp->link);
 			of_node_put(cp->node);