blk-mq: don't create hctx debugfs dir until q->debugfs_dir is created
blk_mq_debugfs_register_hctx() can be called by blk_mq_update_nr_hw_queues when gendisk isn't added yet, such as nvme tcp. Fixes the warning of 'debugfs: Directory 'hctx0' with parent '/' already present!' which can be observed reliably when running blktests nvme/005. Fixes: 6cfc0081 ("blk-mq: no need to check return value of debugfs_create functions") Reported-by:Yi Zhang <yi.zhang@redhat.com> Signed-off-by:
Ming Lei <ming.lei@redhat.com> Tested-by:
Yi Zhang <yi.zhang@redhat.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220711090808.259682-1-ming.lei@redhat.com Signed-off-by:
Jens Axboe <axboe@kernel.dk>
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