PM / Domains: Fix unsafe iteration over modified list of device links

pm_genpd_remove_subdomain() iterates over domain's master_links list and
removes matching element thus it has to use safe version of list
iteration.

Fixes: f721889ff65a ("PM / Domains: Support for generic I/O PM domains (v8)")
Cc: 3.1+ <stable@vger.kernel.org> # 3.1+
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>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index b8d7907ee101..048dc74e3d72 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1446,7 +1446,7 @@ EXPORT_SYMBOL_GPL(pm_genpd_add_subdomain);
 int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
                               struct generic_pm_domain *subdomain)
 {
-        struct gpd_link *link;
+        struct gpd_link *l, *link;
         int ret = -EINVAL;
 
         if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain))
@@ -1462,7 +1462,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
                 goto out;
         }
 
-        list_for_each_entry(link, &genpd->master_links, master_node) {
+        list_for_each_entry_safe(link, l, &genpd->master_links, master_node) {
                 if (link->slave != subdomain)
                         continue;