linux-kernel - Re: [PATCH V5 0/2] nvme-pci: fix the timeout case when reset is ongoing

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Message-ID: <20180119115255.GH12043@localhost.localdomain>
Date:   Fri, 19 Jan 2018 04:52:56 -0700
From:   Keith Busch <keith.busch@...el.com>
To:     "jianchao.wang" <jianchao.w.wang@...cle.com>
Cc:     axboe@...com, hch@....de, sagi@...mberg.me, maxg@...lanox.com,
        james.smart@...adcom.com, linux-nvme@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V5 0/2] nvme-pci: fix the timeout case when reset is
 ongoing

On Fri, Jan 19, 2018 at 05:02:06PM +0800, jianchao.wang wrote:
> We should not use blk_sync_queue here, the requeue_work and run_work will be canceled.
> Just flush_work(&q->timeout_work) should be ok.

I agree flushing timeout_work is sufficient. All the other work had
already better not be running either, so it doesn't hurt to call the
sync API.
 
> In addition, we could check NVME_CC_ENABLE in nvme_dev_disable to avoid redundant invoking.
> :)

That should already be inferred through reading back the CSTS register.