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authorWeiping Zhang <zhangweiping@didiglobal.com>2020-05-07 21:03:56 +0800
committerJens Axboe <axboe@kernel.dk>2020-05-09 16:15:12 -0600
commita2584e43f5672e2715c0c5ca28ccff3b9f381581 (patch)
tree39890353cea4889c86a35f3082e9ba43762c328e /block
parent2e194422f1eb4cdf5d6697bcfe0bbaf3059bbb5e (diff)
block: save previous hardware queue count before udpate
blk_mq_realloc_tag_set_tags will update set->nr_hw_queues, so save old set->nr_hw_queues before call this function. Signed-off-by: Weiping Zhang <zhangweiping@didiglobal.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index e9643b0d6860..9e518aefc04b 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3358,11 +3358,11 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set,
blk_mq_sysfs_unregister(q);
}
+ prev_nr_hw_queues = set->nr_hw_queues;
if (blk_mq_realloc_tag_set_tags(set, set->nr_hw_queues, nr_hw_queues) <
0)
goto reregister;
- prev_nr_hw_queues = set->nr_hw_queues;
set->nr_hw_queues = nr_hw_queues;
blk_mq_update_queue_map(set);
fallback: