!2190 zram: correctly handle all next_arg() cases

Merge Pull Request from: @ci-robot 
 
PR sync from: Jinjiang Tu <tujinjiang@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/BIP6YYNINUCB5BIUUNJRJCLTT433FADA/ 
 
https://gitee.com/openeuler/kernel/issues/I822Z8 
 
Link:https://gitee.com/openeuler/kernel/pulls/2190

 

Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>