hulk inclusion
category: bugfix
bugzilla: 188107, https://gitee.com/openeuler/kernel/issues/I665S2
CVE: NA

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Otherwise io will hang because timer is canceled. And make iocg->online
updated under both 'ioc->lock' and 'iocg->waitq.lock', so it can be
guaranteed that iocg will stay online while holding any lock.
Signed-off-by: NYu Kuai <yukuai3@huawei.com>
Signed-off-by: NLi Nan <linan122@huawei.com>
(cherry picked from commit bc184a0b)