Re: [PATCH v2 4/9] scsi: Rework scsi_mq_alloc_queue()

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On 11/16/20 9:17 AM, Christoph Hellwig wrote:
On Sun, Nov 15, 2020 at 07:04:54PM -0800, Bart Van Assche wrote:
Do not modify sdev->request_queue. Remove the sdev->request_queue
assignment. That assignment is superfluous because scsi_mq_alloc_queue()
only has one caller and that caller calls scsi_mq_alloc_queue() as follows:

	sdev->request_queue = scsi_mq_alloc_queue(sdev);

This looks ok to me.  But is there any good to keep scsi_mq_alloc_queue
around at all?  It is so trivial that it can be open coded in the
currently only caller, as well as a new one if added.

Hi Christoph,

A later patch in this series introduces a second call to scsi_mq_alloc_queue(). Do we really want to have multiple functions that set QUEUE_FLAG_SCSI_PASSTHROUGH? I'm concerned that if the logic for creating a SCSI queue would ever be changed that only the copy in the SCSI core would be updated but not the copy in the SPI code.

Thanks,

Bart.



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