linux-kernel - [PATCH 4.4 47/50] scsi: mptsas: Disable WRITE SAME

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Date:   Fri, 27 Apr 2018 15:58:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Nikola Ciprich <nikola.ciprich@...uxbox.cz>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 4.4 47/50] scsi: mptsas: Disable WRITE SAME

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Martin K. Petersen <martin.petersen@...cle.com>

commit 94e5395d2403c8bc2504a7cbe4c4caaacb7b8b84 upstream.

First generation MPT Fusion controllers can not translate WRITE SAME
when the attached device is a SATA drive. Disable WRITE SAME support.

Reported-by: Nikola Ciprich <nikola.ciprich@...uxbox.cz>
Cc: <stable@...r.kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/message/fusion/mptsas.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -1994,6 +1994,7 @@ static struct scsi_host_template mptsas_
 	.cmd_per_lun			= 7,
 	.use_clustering			= ENABLE_CLUSTERING,
 	.shost_attrs			= mptscsih_host_attrs,
+	.no_write_same			= 1,
 };

 static int mptsas_get_linkerrors(struct sas_phy *phy)