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

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Date:   Thu, 26 Apr 2018 22:32:21 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Tejun Heo <tj@...nel.org>
Cc:     Hans de Goede <hdegoede@...hat.com>, linux-ide@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        "Richard W . M . Jones" <rjones@...hat.com>
Subject: [PATCH] libata: Apply NOLPM quirk for SanDisk SD7UB3Q*G1001 SSDs

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: stable@...r.kernel.org
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>
---
 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 6e400ff2b5db..68596bd4cf06 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4552,6 +4552,9 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	/* This specific Samsung model/firmware-rev does not handle LPM well */
 	{ "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", 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 |
 						ATA_HORKAGE_ZERO_AFTER_TRIM, },
-- 
2.17.0