Once device_register() failed, we should call put_device() to
decrement reference count for cleanup. Or it could cause memory leak.
device_register() includes device_add(). As comment of device_add()
says, 'if device_add() succeeds, you should call device_del() when you
want to get rid of it. If device_add() has not succeeded, use only
put_device() to drop the reference count'.
Found by code review.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Ma Ke <make24@xxxxxxxxxxx>
---
Changes in v2:
- modified the patch as suggestions.
---
arch/arm/common/locomo.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/common/locomo.c b/arch/arm/common/locomo.c
index 309b74783468..9e48cbb2568e 100644
--- a/arch/arm/common/locomo.c
+++ b/arch/arm/common/locomo.c
@@ -253,6 +253,8 @@ locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info)
ret = device_register(&dev->dev);
if (ret) {
+ put_device(&dev->dev);
+ return ret;
out:
kfree(dev);
}
--
2.25.1
