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From: Bart Van Assche <bvanassche@acm.org>
To: Ming Lei <ming.lei@redhat.com>, Hannes Reinecke <hare@suse.de>
Cc: "Martin K . Petersen" <martin.petersen@oracle.com>,
	"James E . J . Bottomley" <jejb@linux.vnet.ibm.com>,
	Jens Axboe <axboe@kernel.dk>, Christoph Hellwig <hch@lst.de>,
	linux-scsi@vger.kernel.org, linux-block@vger.kernel.org,
	Alan Stern <stern@rowland.harvard.edu>,
	Can Guo <cang@codeaurora.org>,
	Stanley Chu <stanley.chu@mediatek.com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>
Subject: Re: [PATCH v4 5/9] scsi: Do not wait for a request in scsi_eh_lock_door()
Date: Fri, 4 Dec 2020 08:50:44 -0800	[thread overview]
Message-ID: <32732e89-e425-2b71-4564-35e243f170bc@acm.org> (raw)
In-Reply-To: <20201203072738.GB633702@T590>

On 12/2/20 11:27 PM, Ming Lei wrote:
> BTW, scsi_eh_lock_door() returns void, and it can't be sync because
> there may not be any driver tag available. Even though it is available,
> the host state isn't running yet, so the command can't be queued to LLD
> yet.
> 
> Maybe the above lines should be put after host state is updated to
> RUNNING.
> 
> Also changing to NOWAIT can't avoid the issue completely, what if 'none'
> is used?

Hi Ming,

I am considering to drop this patch since the latest version of the SPI
DV patch no longer introduces a new blk_mq_freeze_queue() call in the
SPI DV code. In other words, any potential issues with
scsi_eh_lock_door() are existing issues and are not made worse by my
patch series.

Thanks,

Bart.

  reply	other threads:[~2020-12-04 16:51 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-30  2:46 [PATCH v4 0/9] Rework runtime suspend and SPI domain validation Bart Van Assche
2020-11-30  2:46 ` [PATCH v4 1/9] block: Fix a race in the runtime power management code Bart Van Assche
2020-11-30  2:46 ` [PATCH v4 2/9] block: Introduce BLK_MQ_REQ_PM Bart Van Assche
2020-12-01 11:31   ` Christoph Hellwig
2020-12-02  6:50   ` Hannes Reinecke
2020-11-30  2:46 ` [PATCH v4 3/9] ide: Do not set the RQF_PREEMPT flag for sense requests Bart Van Assche
2020-12-01 11:29   ` Christoph Hellwig
2020-12-02  6:52   ` Hannes Reinecke
2020-11-30  2:46 ` [PATCH v4 4/9] ide: Mark power management requests with RQF_PM instead of RQF_PREEMPT Bart Van Assche
2020-12-01 11:31   ` Christoph Hellwig
2020-12-02  6:53   ` Hannes Reinecke
2020-11-30  2:46 ` [PATCH v4 5/9] scsi: Do not wait for a request in scsi_eh_lock_door() Bart Van Assche
2020-12-02  7:06   ` Hannes Reinecke
2020-12-03  5:10     ` Bart Van Assche
2020-12-03  7:18       ` Hannes Reinecke
2020-12-03  7:27         ` Ming Lei
2020-12-04 16:50           ` Bart Van Assche [this message]
2020-11-30  2:46 ` [PATCH v4 6/9] scsi_transport_spi: Set RQF_PM for domain validation commands Bart Van Assche
2020-12-01 11:31   ` Christoph Hellwig
2020-11-30  2:46 ` [PATCH v4 7/9] scsi: Only process PM requests if rpm_status != RPM_ACTIVE Bart Van Assche
2020-12-01 11:32   ` Christoph Hellwig
2020-12-02  7:14   ` Hannes Reinecke
2020-11-30  2:46 ` [PATCH v4 8/9] block: Remove RQF_PREEMPT and BLK_MQ_REQ_PREEMPT Bart Van Assche
2020-12-01 11:33   ` Christoph Hellwig
2020-12-02  7:15   ` Hannes Reinecke
2020-11-30  2:46 ` [PATCH v4 9/9] block: Do not accept any requests while suspended Bart Van Assche
2020-12-02  7:16   ` Hannes Reinecke
2020-12-02  1:51 ` [PATCH v4 0/9] Rework runtime suspend and SPI domain validation Martin K. Petersen
2020-12-06  0:01   ` Jens Axboe
2020-12-08  1:56 ` Martin K. Petersen

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