linux-kernel - [PATCH 3.19.y-ckt 010/130] libata: force disable trim for SuperSSpeed S238

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Date:	Thu, 27 Aug 2015 15:10:01 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Arne Fitzenreiter <arne_f@...ire.org>, Tejun Heo <tj@...nel.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.19.y-ckt 010/130] libata: force disable trim for SuperSSpeed S238

3.19.8-ckt6 -stable review patch.  If anyone has any objections, please let me know.

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

From: Arne Fitzenreiter <arne_f@...ire.org>

commit cda57b1b05cf7b8b99ab4b732bea0b05b6c015cc upstream.

This device loses blocks, often the partition table area, on trim.
Disable TRIM.
http://pcengines.ch/msata16a.htm

Signed-off-by: Arne Fitzenreiter <arne_f@...ire.org>
Signed-off-by: Tejun Heo <tj@...nel.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/ata/libata-core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b1d52c9..45a4c3f 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4247,6 +4247,9 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "Samsung SSD 8*",		NULL,	ATA_HORKAGE_NO_NCQ_TRIM |
 						ATA_HORKAGE_ZERO_AFTER_TRIM, },
 
+	/* devices that don't properly handle TRIM commands */
+	{ "SuperSSpeed S238*",		NULL,	ATA_HORKAGE_NOTRIM, },
+
 	/*
 	 * As defined, the DRAT (Deterministic Read After Trim) and RZAT
 	 * (Return Zero After Trim) flags in the ATA Command Set are
-- 
1.9.1

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