[PATCH 5.17 0027/1126] coresight: syscfg: Fix memleak on registration failure in cscfg_create_device

From: Greg Kroah-Hartman
Date: Tue Apr 05 2022 - 03:41:06 EST

From: Miaoqian Lin <linmq006@xxxxxxxxx>

commit cfa5dbcdd7aece76f3415284569f2f384aff0253 upstream.

device_register() calls device_initialize(),
according to doc of device_initialize:

Use put_device() to give up your reference instead of freeing
* @dev directly once you have called this function.

To prevent potential memleak, use put_device() for error handling.

Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
Fixes: 85e2414c518a ("coresight: syscfg: Initial coresight system configuration")
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20220124124121.8888-1-linmq006@xxxxxxxxx
Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
drivers/hwtracing/coresight/coresight-syscfg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hwtracing/coresight/coresight-syscfg.c
+++ b/drivers/hwtracing/coresight/coresight-syscfg.c
@@ -1049,7 +1049,7 @@ static int cscfg_create_device(void)

err = device_register(dev);
if (err)
- cscfg_dev_release(dev);
+ put_device(dev);