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From: Bart Van Assche <bvanassche@acm.org>
To: John Garry <john.garry@huawei.com>,
	satishkh@cisco.com, sebaddel@cisco.com, kartilak@cisco.com,
	jejb@linux.ibm.com, martin.petersen@oracle.com
Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
	hare@suse.de, hch@lst.de
Subject: Re: [PATCH 2/3] scsi: fnic: Stop setting scsi_cmnd.tag
Date: Fri, 13 Aug 2021 20:17:45 -0700	[thread overview]
Message-ID: <3e5d1bd4-cee9-7fd0-93a4-58d808e198f6@acm.org> (raw)
In-Reply-To: <1628862553-179450-3-git-send-email-john.garry@huawei.com>

On 8/13/21 6:49 AM, John Garry wrote:
> It is never read. Setting it and the request tag seems dodgy
> anyway.

This is done because there is code in the SCSI error handler that may
allocate a SCSI command without allocating a tag. See also
scsi_ioctl_reset().

> ---
>  drivers/scsi/fnic/fnic_scsi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
> index 0f9cedf78872..f8afbfb468dc 100644
> --- a/drivers/scsi/fnic/fnic_scsi.c
> +++ b/drivers/scsi/fnic/fnic_scsi.c
> @@ -2213,7 +2213,7 @@ fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
>  	if (IS_ERR(dummy))
>  		return SCSI_NO_TAG;
>  
> -	sc->tag = rq->tag = dummy->tag;
> +	rq->tag = dummy->tag;
>  	sc->host_scribble = (unsigned char *)dummy;

Reviewed-by: Bart Van Assche <bvanassche@acm.org>

  parent reply	other threads:[~2021-08-14  3:17 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-13 13:49 [PATCH 0/3] Remove scsi_cmnd.tag John Garry
2021-08-13 13:49 ` [PATCH 1/3] scsi: wd719: Stop using scsi_cmnd.tag John Garry
2021-08-13 16:30   ` Hannes Reinecke
2021-08-14  3:11   ` Bart Van Assche
2021-08-13 13:49 ` [PATCH 2/3] scsi: fnic: Stop setting scsi_cmnd.tag John Garry
2021-08-13 16:31   ` Hannes Reinecke
2021-08-14  3:17   ` Bart Van Assche [this message]
2021-08-14  7:39     ` Christoph Hellwig
2021-08-14 12:35       ` Hannes Reinecke
2021-08-16 10:00         ` John Garry
2021-08-16 11:11           ` Hannes Reinecke
2021-08-13 13:49 ` [PATCH 3/3] scsi: Remove scsi_cmnd.tag John Garry
2021-08-13 16:31   ` Hannes Reinecke
2021-08-14  3:18   ` Bart Van Assche
2021-08-14  7:40 ` [PATCH 0/3] " Christoph Hellwig
2021-08-16 17:34 ` Martin K. Petersen
2021-08-18 18:08   ` John Garry
2021-08-18 18:46     ` Martin K. Petersen
2021-08-19  2:41     ` Bart Van Assche
2021-08-19  7:15       ` Hannes Reinecke
2021-08-19  7:27         ` John Garry
2021-08-19  7:50           ` Hannes Reinecke
2021-08-19  9:09             ` John Garry
2021-08-24  4:03 ` Martin K. Petersen
2021-08-24  7:54   ` John Garry

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