coresight: syscfg: Fix memleak on registration failure in cscfg_create_device

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2055405

commit cfa5dbc
Author: Miaoqian Lin <linmq006@gmail.com>
Date:   Mon Jan 24 12:41:21 2022 +0000

    coresight: syscfg: Fix memleak on registration failure in cscfg_create_device

    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@gmail.com>
    Fixes: 85e2414 ("coresight: syscfg: Initial coresight system configuration")
    Cc: stable@vger.kernel.org
    Link: https://lore.kernel.org/r/20220124124121.8888-1-linmq006@gmail.com
    Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
    Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>

Signed-off-by: Jeremy Linton <jlinton@redhat.com>

Author: jlinton

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);
 
 create_dev_exit_unlock:
 	mutex_unlock(&cscfg_mutex);