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blk-cgroup: fix missing pd_online_fn() while activating policy 

[ Upstream commit e3ff8887e7 ]

If the policy defines pd_online_fn(), it should be called after
pd_init_fn(), like blkg_create().

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230103112833.2013432-1-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yu Kuai 2023-01-03 19:28:33 +08:00 committed by Greg Kroah-Hartman
parent 4923160393
commit 1986cd616b
1 changed files with 4 additions and 0 deletions
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4
block/blk-cgroup.c
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@ -1445,6 +1445,10 @@ retry:
list_for_each_entry_reverse(blkg, &q->blkg_list, q_node)
pol->pd_init_fn(blkg->pd[pol->plid]);
if (pol->pd_online_fn)
list_for_each_entry_reverse(blkg, &q->blkg_list, q_node)
pol->pd_online_fn(blkg->pd[pol->plid]);
__set_bit(pol->plid, q->blkcg_pols);
ret = 0;