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| author | Giuliano Procida <gprocida@google.com> | 2020-06-18 19:30:22 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-20 10:24:19 +0200 |
| commit | 6754baabb890eed09f30c84016242c52a6c2d2d4 (patch) | |
| tree | d7e27cc408201d03a97e8de56a6670f4e69e66d5 | |
| parent | ed80f400f6dd6a9228ef297a00803ede191e3007 (diff) | |
| download | linux-stable-6754baabb890eed09f30c84016242c52a6c2d2d4.tar.gz linux-stable-6754baabb890eed09f30c84016242c52a6c2d2d4.tar.bz2 linux-stable-6754baabb890eed09f30c84016242c52a6c2d2d4.zip | |
blk-mq: move blk_mq_update_nr_hw_queues synchronize_rcu call
This fixes the
4.9 backport commit f530afb974c2e82047bd6220303a2dbe30eff304
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 (in blk_mq_update_nr_hw_queues instead),
just after unfreezeing queues.
This commit moves the call to its intended place.
Fixes: f530afb974c2 ("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>
| -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 58be2eaa5aaa..e0ed7317e98c 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2331,6 +2331,10 @@ void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues) 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; list_for_each_entry(q, &set->tag_list, tag_set_list) { @@ -2346,10 +2350,6 @@ void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues) 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(); } EXPORT_SYMBOL_GPL(blk_mq_update_nr_hw_queues); |