[PATCH] power: charger-manager: fix a potential NULL pointer dereference

[Kangjie Lu]

In case create_freezable_workqueue fails, the fix return -ENOMEM
to avoid a potential NULL pointer dereference.

Signed-off-by: Kangjie Lu <k...@umn.edu>
---
 drivers/power/supply/charger-manager.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/power/supply/charger-manager.c 
b/drivers/power/supply/charger-manager.c
index 38be91f21cc4..d29c4f338157 100644
--- a/drivers/power/supply/charger-manager.c
+++ b/drivers/power/supply/charger-manager.c
@@ -1987,6 +1987,9 @@ static struct platform_driver charger_manager_driver = {
 static int __init charger_manager_init(void)
 {
        cm_wq = create_freezable_workqueue("charger_manager");
+       if (unlikely(!cm_wq))
+               return -ENOMEM;
+
        INIT_DELAYED_WORK(&cm_monitor_work, cm_monitor_poller);
 
        return platform_driver_register(&charger_manager_driver);
-- 
2.17.1