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Date:   Thu, 7 Dec 2017 15:45:43 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Douglas Gilbert <dgilbert@...erlog.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.14 054/135] scsi: scsi_debug: write_same: fix
 error report

From: Douglas Gilbert <dgilbert@...erlog.com>

[ Upstream commit e33d7c56450b0a5c7290cbf9e1581fab5174f552 ]

The scsi_debug driver incorrectly suggests there is an error with the
SCSI WRITE SAME command when the number_of_logical_blocks is greater
than 1. It will also suggest there is an error when NDOB
(no data-out buffer) is set and the number_of_logical_blocks is
greater than 0. Both are valid, fix.

Signed-off-by: Douglas Gilbert <dgilbert@...erlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/scsi/scsi_debug.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 09ba494f8896..92bc5b2d24ae 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -3001,11 +3001,11 @@ static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
 	if (-1 == ret) {
 		write_unlock_irqrestore(&atomic_rw, iflags);
 		return DID_ERROR << 16;
-	} else if (sdebug_verbose && (ret < (num * sdebug_sector_size)))
+	} else if (sdebug_verbose && !ndob && (ret < sdebug_sector_size))
 		sdev_printk(KERN_INFO, scp->device,
-			    "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
+			    "%s: %s: lb size=%u, IO sent=%d bytes\n",
 			    my_name, "write same",
-			    num * sdebug_sector_size, ret);
+			    sdebug_sector_size, ret);
 
 	/* Copy first sector to remaining blocks */
 	for (i = 1 ; i < num ; i++)
-- 
2.11.0

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