linux-kernel - Re: [PATCH RESEND] blk-mq: fix possible creation failure for 'debugfs

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Message-Id: <165042064016.532249.4832316049346088891.b4-ty@kernel.dk>
Date:   Tue, 19 Apr 2022 20:10:40 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     yukuai3@...wei.com
Cc:     linux-block@...r.kernel.org, yi.zhang@...wei.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND] blk-mq: fix possible creation failure for 'debugfs_dir'

On Fri, 15 Apr 2022 11:56:07 +0800, Yu Kuai wrote:
> 'q->debugfs_dir' is created in blk_register_queue(), however, it's not
> removed in blk_unregister_queue() and is delayed to blk_release_queue().
> Thus it's possible that del_gendisk() is done and blk_release_queue()
> is not called yet, and in the mean time blk_register_queue() is called
> for the new device with the same name. In this case, kernel will
> compalin about creation failure for 'debugfs_dir' like following:
> 
> [...]

Applied, thanks!

[1/1] blk-mq: fix possible creation failure for 'debugfs_dir'
      commit: a87c29e1a85e64b28445bb1e80505230bf2e3b4b

Best regards,
-- 
Jens Axboe