linux-kernel - [PATCH] platform/x86: thinkpad_acpi: Add missing T14s Gen1 type to s2idle quirk list

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Message-Id: <20230331232447.37204-1-asbachb.kernel@impl.it>
Date:   Sat,  1 Apr 2023 01:24:47 +0200
From:   Benjamin Asbach <asbachb.kernel@...l.it>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Mario Limonciello <mario.limonciello@....com>,
        Mark Pearson <markpearson@...vo.com>,
        Benjamin Asbach <asbachb.kernel@...l.it>,
        Henrique de Moraes Holschuh <hmh@....eng.br>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        ibm-acpi-devel@...ts.sourceforge.net,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] platform/x86: thinkpad_acpi: Add missing T14s Gen1 type to s2idle quirk list

> Lenovo laptops that contain NVME SSDs across a variety of generations have
> trouble resuming from suspend to idle when the IOMMU translation layer is
> active for the NVME storage device.
>
> This generally manifests as a large resume delay or page faults. These
> delays and page faults occur as a result of a Lenovo BIOS specific SMI
> that runs during the D3->D0 transition on NVME devices.

Link: https://lore.kernel.org/all/20220503183420.348-1-mario.limonciello@amd.com/

As Lenovo distributes T14s Gen1 laptops with different product names
a missing one is added by this patch.

Note: Based on lenovo support page there might be some more variants which
are not represented in s2idle quirk list.

Signed-off-by: Benjamin Asbach <asbachb.kernel@...l.it>
Tested-by: Benjamin Asbach <asbachb.kernel@...l.it>

Link: https://bbs.archlinux.org/viewtopic.php?pid=2084655#p2084655
---
 drivers/platform/x86/thinkpad_acpi.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 32c10457399e..57428d7a392d 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -4478,6 +4478,15 @@ static const struct dmi_system_id fwbug_list[] __initconst = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "20UH"),
 		}
 	},
+	{
+		.ident = "T14s Gen1 AMD",
+		.driver_data = &quirk_s2idle_bug,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "20UJ"),
+		}
+	},
+
 	{
 		.ident = "P14s Gen1 AMD",
 		.driver_data = &quirk_s2idle_bug,
-- 
2.40.0