linux-kernel - Re: [PATCH] block/null_blk: Fix double blk_mq_start

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Message-Id: <170050120665.99906.16634161281918179381.b4-ty@kernel.dk>
Date:   Mon, 20 Nov 2023 10:26:46 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     bvanassche@....org, chengming.zhou@...ux.dev
Cc:     kch@...dia.com, damien.lemoal@...nsource.wdc.com,
        ming.lei@...hat.com, zhouchengming@...edance.com,
        justinstitt@...gle.com, shinichiro.kawasaki@....com,
        akinobu.mita@...il.com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        syzbot+fcc47ba2476570cbbeb0@...kaller.appspotmail.com
Subject: Re: [PATCH] block/null_blk: Fix double blk_mq_start_request()
 warning


On Mon, 20 Nov 2023 03:25:21 +0000, chengming.zhou@...ux.dev wrote:
> When CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION is enabled, null_queue_rq()
> would return BLK_STS_RESOURCE or BLK_STS_DEV_RESOURCE for the request,
> which has been marked as MQ_RQ_IN_FLIGHT by blk_mq_start_request().
> 
> Then null_queue_rqs() put these requests in the rqlist, return back to
> the block layer core, which would try to queue them individually again,
> so the warning in blk_mq_start_request() triggered.
> 
> [...]

Applied, thanks!

[1/1] block/null_blk: Fix double blk_mq_start_request() warning
      commit: 53f2bca2609237f910531f2c1a7779b16ce7952d

Best regards,
-- 
Jens Axboe