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| author | Giuliano Procida <gprocida@google.com> | 2020-06-18 19:32:23 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-20 10:25:17 +0200 |
| commit | b609c7cecb7173fc8a0faf4cd828de3275091a2c (patch) | |
| tree | 31fa838fcd9b3e81776a09b1e5f824fb54c2a014 /block | |
| parent | c537cd50721cc21d9dc8ec5b3d5c720436bb7d98 (diff) | |
| download | linux-rt-b609c7cecb7173fc8a0faf4cd828de3275091a2c.tar.gz | |
blk-mq: move _blk_mq_update_nr_hw_queues synchronize_rcu call
This fixes the
4.14 backport commit 574eb136ec7f315c3ef2ca68fa9b3e16c56baa24
which was
upstream commit f5bbbbe4d63577026f908a809f22f5fd5a90ea1f.
The upstream commit added a call to synchronize_rcu to
_blk_mq_update_nr_hw_queues, just after freezing queues.
In the backport this landed just after unfreezeing queues.
This commit moves the call to its intended place.
Fixes: 574eb136ec7f ("blk-mq: sync the update nr_hw_queues with blk_mq_queue_tag_busy_iter")
Signed-off-by: Giuliano Procida <gprocida@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 9d53f476c517..cf56bdad2e06 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2738,6 +2738,10 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, list_for_each_entry(q, &set->tag_list, tag_set_list) blk_mq_freeze_queue(q); + /* + * Sync with blk_mq_queue_tag_busy_iter. + */ + synchronize_rcu(); set->nr_hw_queues = nr_hw_queues; blk_mq_update_queue_map(set); @@ -2748,10 +2752,6 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, list_for_each_entry(q, &set->tag_list, tag_set_list) blk_mq_unfreeze_queue(q); - /* - * Sync with blk_mq_queue_tag_busy_iter. - */ - synchronize_rcu(); } void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues) |