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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>
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1 changed files with 1 additions and 1 deletions
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@ -3358,11 +3358,11 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set,
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blk_mq_sysfs_unregister(q);
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blk_mq_sysfs_unregister(q);
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}
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}
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prev_nr_hw_queues = set->nr_hw_queues;
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if (blk_mq_realloc_tag_set_tags(set, set->nr_hw_queues, nr_hw_queues) <
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if (blk_mq_realloc_tag_set_tags(set, set->nr_hw_queues, nr_hw_queues) <
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0)
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0)
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goto reregister;
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goto reregister;
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prev_nr_hw_queues = set->nr_hw_queues;
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set->nr_hw_queues = nr_hw_queues;
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set->nr_hw_queues = nr_hw_queues;
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blk_mq_update_queue_map(set);
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blk_mq_update_queue_map(set);
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fallback:
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fallback:
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