linux-kernel - Re: [PATCH] scsi: Enlarge log buffer length to 256

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Message-ID: <9831381e-f9c7-f7af-e6da-a757a76f34@linux-m68k.org>
Date:   Fri, 24 Jun 2022 11:39:32 +1000 (AEST)
From:   Finn Thain <fthain@...ux-m68k.org>
To:     Li Zhijian <lizhijian@...itsu.com>
cc:     "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: Enlarge log buffer length to 256


On Fri, 24 Jun 2022, Li Zhijian wrote:

> scsi_report_sense() is possble to print messages exceeding 128 bytes:
> [  475.156955] sd 9:0:0:0: Warning! Received an indication that the LUN assignments on this target have changed. The Linux SCSI layer does not automatical
> 
> Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
> ---
>  drivers/scsi/scsi_logging.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/scsi_logging.c b/drivers/scsi/scsi_logging.c
> index b02af340c2d3..edc3fe8c7e0f 100644
> --- a/drivers/scsi/scsi_logging.c
> +++ b/drivers/scsi/scsi_logging.c
> @@ -17,7 +17,7 @@
>  
>  static char *scsi_log_reserve_buffer(size_t *len)
>  {
> -	*len = 128;
> +	*len = 256;
>  	return kmalloc(*len, GFP_ATOMIC);
>  }
>  

Perhaps it's better to waste fewer words (both kinds). E.g.

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 49ef864df581..e7283bf23db3 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -463,13 +463,11 @@ static void scsi_report_sense(struct scsi_device *sdev,
 			evt_type = SDEV_EVT_LUN_CHANGE_REPORTED;
 			scsi_report_lun_change(sdev);
 			sdev_printk(KERN_WARNING, sdev,
-				    "Warning! Received an indication that the "
 				    "LUN assignments on this target have "
 				    "changed. The Linux SCSI layer does not "
 				    "automatically remap LUN assignments.\n");
 		} else if (sshdr->asc == 0x3f)
 			sdev_printk(KERN_WARNING, sdev,
-				    "Warning! Received an indication that the "
 				    "operating parameters on this target have "
 				    "changed. The Linux SCSI layer does not "
 				    "automatically adjust these parameters.\n");