linux-kernel - Re: [RFC PATCH 03/10] scsi/constants: Cleanup printk message in __scsi_print

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Date:	Fri, 15 Aug 2014 11:05:49 -0400
From:	Ewan Milne <emilne@...hat.com>
To:	Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@...achi.com>
Cc:	Hannes Reinecke <hare@...e.de>, linux-scsi@...r.kernel.org,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	yrl.pp-manager.tt@...achi.com, linux-kernel@...r.kernel.org,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>,
	Doug Gilbert <dgilbert@...erlog.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Christoph Hellwig <hch@....de>
Subject: Re: [RFC PATCH 03/10] scsi/constants: Cleanup printk message in
 __scsi_print_command()

On Fri, 2014-08-08 at 11:50 +0000, Yoshihiro YUNOMAE wrote:
> All bytes in CDB should be output after linebuf is filled because
> "[%s] CDB: %s\n" message is output many times in loop.
> 
> Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@...achi.com>
> Cc: Hannes Reinecke <hare@...e.de>
> Cc: Doug Gilbert <dgilbert@...erlog.com>
> Cc: Martin K. Petersen <martin.petersen@...cle.com>
> Cc: Christoph Hellwig <hch@....de>
> Cc: "James E.J. Bottomley" <JBottomley@...allels.com>
> Cc: Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>
> Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
> ---
>  drivers/scsi/constants.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/scsi/constants.c b/drivers/scsi/constants.c
> index 9c38b8d..5956d4d 100644
> --- a/drivers/scsi/constants.c
> +++ b/drivers/scsi/constants.c
> @@ -413,9 +413,8 @@ void __scsi_print_command(struct scsi_device *sdev, const char *prefix,
>  
>  		hex_dump_to_buffer(cdb + i, linelen, 16, 1,
>  				   linebuf, sizeof(linebuf), false);
> -		sdev_printk(KERN_INFO, sdev, "[%s] CDB: %s\n",
> -			    prefix, linebuf);
>  	}
> +	sdev_printk(KERN_INFO, sdev, "[%s] CDB: %s\n", prefix, linebuf);
>  }
>  EXPORT_SYMBOL(__scsi_print_command);

This doesn't look right -- In Hannes' tree what the code is doing is
printing out a separate line for each 16 bytes of the CDB.  You change
will cause only the last (partial?) 16 bytes to be printed.

-Ewan


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