Add ccw_driver_unregister() if tty_register_driver() fails.

Signed-off-by: Haoxiang Li <lihaoxiang@isrc.iscas.ac.cn>
---
 drivers/s390/char/con3215.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 56e43d43c713..3ffa5ac075c7 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -1181,6 +1181,7 @@ static int __init tty3215_init(void)
 	tty_set_operations(driver, &tty3215_ops);
 	ret = tty_register_driver(driver);
 	if (ret) {
+		ccw_driver_unregister(&raw3215_ccw_driver);
 		tty_driver_kref_put(driver);
 		return ret;
 	}
-- 
2.25.1