!8405 tty: serial: 8250: serial_cs: Fix a memory leak in error handling path

Merge Pull Request from: @ci-robot 
 
PR sync from: Cai Xinchen <caixinchen1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/RWSMLNRICBL2OEEVL7KKDA2S6SAM3DUT/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9S6TL 
 
Link:https://gitee.com/openeuler/kernel/pulls/8405

 

Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>