[PATCH] extcon: Fix error handling in extcon_dev_register

[Dinghao Liu]

When devm_kcalloc() fails, we should execute device_unregister()
to unregister edev->dev from system.

Fixes: 046050f6e623e ("extcon: Update the prototype of 
extcon_register_notifier() with enum extcon")
Signed-off-by: Dinghao Liu <dinghao....@zju.edu.cn>
---
 drivers/extcon/extcon.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 0a6438cbb3f3..e7a9561a826d 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -1241,6 +1241,7 @@ int extcon_dev_register(struct extcon_dev *edev)
                                sizeof(*edev->nh), GFP_KERNEL);
        if (!edev->nh) {
                ret = -ENOMEM;
+               device_unregister(&edev->dev);
                goto err_dev;
        }
 
-- 
2.17.1