linux-kernel - [PATCH 3.16 234/366] libata: Apply NOLPM quirk for SanDisk SD7UB3Q*G1001 SSDs

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Message-ID: <lsq.1539530741.748100624@decadent.org.uk>
Date:   Sun, 14 Oct 2018 16:25:41 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Tejun Heo" <tj@...nel.org>,
        "Hans de Goede" <hdegoede@...hat.com>,
        "Richard W.M. Jones" <rjones@...hat.com>
Subject: [PATCH 3.16 234/366] libata: Apply NOLPM quirk for SanDisk
 SD7UB3Q*G1001 SSDs

3.16.60-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Hans de Goede <hdegoede@...hat.com>

commit 184add2ca23ce5edcac0ab9c3b9be13f91e7b567 upstream.

Richard Jones has reported that using med_power_with_dipm on a T450s
with a Sandisk SD7UB3Q256G1001 SSD (firmware version X2180501) is
causing the machine to hang.

Switching the LPM to max_performance fixes this, so it seems that
this Sandisk SSD does not handle LPM well.

Note in the past there have been bug-reports about the following
Sandisk models not working with min_power, so we may need to extend
the quirk list in the future: name - firmware
Sandisk SD6SB2M512G1022I   - X210400
Sandisk SD6PP4M-256G-1006  - A200906

Cc: Richard W.M. Jones <rjones@...hat.com>
Reported-and-tested-by: Richard W.M. Jones <rjones@...hat.com>
Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Tejun Heo <tj@...nel.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/ata/libata-core.c | 3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4239,6 +4239,9 @@ static const struct ata_blacklist_entry
 	{ "Crucial_CT960M500*",		NULL,	ATA_HORKAGE_NO_NCQ_TRIM |
 						ATA_HORKAGE_NOLPM, },
 
+	/* Sandisk devices which are known to not handle LPM well */
+	{ "SanDisk SD7UB3Q*G1001",	NULL,	ATA_HORKAGE_NOLPM, },
+
 	/* devices that don't properly handle queued TRIM commands */
 	{ "Micron_M500_*",		NULL,	ATA_HORKAGE_NO_NCQ_TRIM, },
 	{ "Crucial_CT*M500*",		NULL,	ATA_HORKAGE_NO_NCQ_TRIM, },