linux-kernel - [RFC PATCH] nvme: add NO APST quirk for Kioxia device

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Message-Id: <20211106020858.18625-1-ematsumiya@suse.de>
Date:   Fri,  5 Nov 2021 23:08:57 -0300
From:   Enzo Matsumiya <ematsumiya@...e.de>
To:     linux-nvme@...ts.infradead.org
Cc:     Enzo Matsumiya <ematsumiya@...e.de>,
        Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...com>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>, linux-kernel@...r.kernel.org
Subject: [RFC PATCH] nvme: add NO APST quirk for Kioxia device

This particular Kioxia device times out and aborts I/O during any load,
but it's more easily observable with discards (fstrim).

The device gets to a state that is also not possible to use "nvme set-feature"
to disable APST. Booting with nvme_core.default_ps_max_latency=0 solves the issue.

We had a dozen or so of these behaving this same way on customer
environment.

Signed-off-by: Enzo Matsumiya <ematsumiya@...e.de>
---
 drivers/nvme/host/core.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 838b5e2058be..a698c099164c 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2469,7 +2469,19 @@ static const struct nvme_core_quirk_entry core_quirks[] = {
 		.vid = 0x14a4,
 		.fr = "22301111",
 		.quirks = NVME_QUIRK_SIMPLE_SUSPEND,
-	}
+	},
+	{
+		/*
+		 * This Kioxia device times out and aborts I/O during any load,
+		 * but more easily reproducible with discards (fstrim).
+		 *
+		 * Device is left in a state that is also not possible to use "nvme set-feature"
+		 * to disable APST, but booting with nvme_core.default_ps_max_latency=0 works.
+		 */
+		.vid = 0x1e0f,
+		.mn = "KCD6XVUL6T40",
+		.quirks = NVME_QUIRK_NO_APST,
+ 	}
 };
 
 /* match is null-terminated but idstr is space-padded. */
-- 
2.33.0