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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Chen Yu <yu.c.chen@intel.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
        Sasha Levin <alexander.levin@microsoft.com>
Subject: [PATCH 4.16 076/279] ACPI / PM: Blacklist Low Power S0 Idle _DSM for ThinkPad X1 Tablet(2016)
Date:   Mon, 18 Jun 2018 10:11:01 +0200
Message-Id: <20180618080611.963556710@linuxfoundation.org>
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4.16-stable review patch.  If anyone has any objections, please let me know.

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

From: Chen Yu <yu.c.chen@intel.com>

[ Upstream commit 855c1c2fce8bdbd796cba1d1456ca8f0e876c2f1 ]

ThinkPad X1 Tablet(2016) is reported to have issues with
the Low Power S0 Idle _DSM interface and since this machine
model generally can do ACPI S3 just fine, and user would
like to use S3 as default sleep model, add a blacklist
entry to disable that interface for ThinkPad X1 Tablet(2016).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=199057
Reported-and-tested-by: Robin Lee <robinlee.sysu@gmail.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/acpi/sleep.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -364,6 +364,19 @@ static const struct dmi_system_id acpisl
 		DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9360"),
 		},
 	},
+	/*
+	 * ThinkPad X1 Tablet(2016) cannot do suspend-to-idle using
+	 * the Low Power S0 Idle firmware interface (see
+	 * https://bugzilla.kernel.org/show_bug.cgi?id=199057).
+	 */
+	{
+	.callback = init_no_lps0,
+	.ident = "ThinkPad X1 Tablet(2016)",
+	.matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "20GGA00L00"),
+		},
+	},
 	{},
 };