power: charger-manager: fix a potential NULL pointer dereference

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

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

diff --git a/drivers/power/supply/charger-manager.c b/drivers/power/supply/charger-manager.c
index 2e8db5e..a6900aa 100644 (file)
--- 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);