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From: Thorsten Leemhuis <>
To: Keith Busch <>, Jens Axboe <>,
	Christoph Hellwig <>, Sagi Grimberg <>,
Subject: [PATCH] nvme-pci: add quirk to make Kingston A2000 SSD avoid deepest sleep state
Date: Fri, 29 Jan 2021 06:24:42 +0100	[thread overview]
Message-ID: <> (raw)

Some Kingston A2000 NVMe SSDs sooner or later get confused and stop
working when they use the deepest APST sleep while running Linux. The
system then crashes and one has to cold boot it to get the SSD working

Kingston seems to known about this since at least mid-September 2020:

Someone working for a German company representing Kingston to the German
press confirmed to me Kingston engineering is aware of the issue and
investigating; the person stated that to their current knowledge only
the deepest APST sleep state causes trouble. Therefore, make Linux avoid
it for now by applying the NVME_QUIRK_NO_DEEPEST_PS to this SSD.

I have two such SSDs, but it seems the problem doesn't occur with them.
I hence couldn't verify if this patch really fixes the problem, but all
the data in front of me suggests it should.

This patch can easily be reverted or improved upon if a better solution

FWIW, there are many reports about the issue scattered around the web;
most of the users disabled APST completely to make things work, some
just made Linux avoid the deepest sleep state:

For the record, some data from 'nvme id-ctrl /dev/nvme0'

NVME Identify Controller:
vid       : 0x2646
ssvid     : 0x2646
mn        : KINGSTON SA2000M81000G
fr        : S5Z42105
ps    0 : mp:9.00W operational enlat:0 exlat:0 rrt:0 rrl:0
          rwt:0 rwl:0 idle_power:- active_power:-
ps    1 : mp:4.60W operational enlat:0 exlat:0 rrt:1 rrl:1
          rwt:1 rwl:1 idle_power:- active_power:-
ps    2 : mp:3.80W operational enlat:0 exlat:0 rrt:2 rrl:2
          rwt:2 rwl:2 idle_power:- active_power:-
ps    3 : mp:0.0450W non-operational enlat:2000 exlat:2000 rrt:3 rrl:3
          rwt:3 rwl:3 idle_power:- active_power:-
ps    4 : mp:0.0040W non-operational enlat:15000 exlat:15000 rrt:4 rrl:4
          rwt:4 rwl:4 idle_power:- active_power:-

Cc: # 4.14+
Signed-off-by: Thorsten Leemhuis <>

Once this is out I will post a link to it in, maybe someone there
might be able to confirm that this fixes the issue.

 drivers/nvme/host/pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 856aa31931c1..421735e16870 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -3257,6 +3257,8 @@ static const struct pci_device_id nvme_id_table[] = {
 	{ PCI_DEVICE(0x15b7, 0x2001),   /*  Sandisk Skyhawk */
+	{ PCI_DEVICE(0x2646, 0x2263),   /* KINGSTON A2000 NVMe SSD  */
+		.driver_data = NVME_QUIRK_NO_DEEPEST_PS, },
 		.driver_data = NVME_QUIRK_SINGLE_VECTOR },

Linux-nvme mailing list

             reply	other threads:[~2021-01-29  5:25 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-29  5:24 Thorsten Leemhuis [this message]
2021-02-02  9:49 ` [PATCH] nvme-pci: add quirk to make Kingston A2000 SSD avoid deepest sleep state Christoph Hellwig

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