!4097 [sync] PR-4090: ida: Fix crash in ida_free when the bitmap is empty

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/4090 
 
PR sync from: Cheng Yu <serein.chengyu@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/AWNFFZV53OQVGD4KCDTY7LBVJGIXP32A/ 
 
https://gitee.com/src-openeuler/kernel/issues/I8WBGZ 
 
Link:https://gitee.com/openeuler/kernel/pulls/4097

 

Reviewed-by: Zucheng Zheng <zhengzucheng@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>