Patch "ACPI / PM: Blacklist Low Power S0 Idle _DSM for Dell XPS13 9360" has been added to the 4.13-stable tree

Patch "ACPI / PM: Blacklist Low Power S0 Idle _DSM for Dell XPS13 9360" has been added to the 4.13-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ACPI / PM: Blacklist Low Power S0 Idle _DSM for Dell XPS13 9360

to the 4.13-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     acpi-pm-blacklist-low-power-s0-idle-_dsm-for-dell-xps13-9360.patch
and it can be found in the queue-4.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 71630b7a832f699d6a6764ae75797e4e743ae348 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Mon, 6 Nov 2017 23:56:57 +0100
Subject: ACPI / PM: Blacklist Low Power S0 Idle _DSM for Dell XPS13 9360

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

commit 71630b7a832f699d6a6764ae75797e4e743ae348 upstream.

At least one Dell XPS13 9360 is reported to have serious issues with
the Low Power S0 Idle _DSM interface and since this machine model
generally can do ACPI S3 just fine, add a blacklist entry to disable
that interface for Dell XPS13 9360.

Fixes: 8110dd281e15 (ACPI / sleep: EC-based wakeup from suspend-to-idle on recent systems)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=196907
Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
Tested-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/acpi/sleep.c |   28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -160,6 +160,14 @@ static int __init init_nvs_nosave(const
 	return 0;
 }
 
+static bool acpi_sleep_no_lps0;
+
+static int __init init_no_lps0(const struct dmi_system_id *d)
+{
+	acpi_sleep_no_lps0 = true;
+	return 0;
+}
+
 static struct dmi_system_id acpisleep_dmi_table[] __initdata = {
 	{
 	.callback = init_old_suspend_ordering,
@@ -343,6 +351,19 @@ static struct dmi_system_id acpisleep_dm
 		DMI_MATCH(DMI_PRODUCT_NAME, "80E3"),
 		},
 	},
+	/*
+	 * https://bugzilla.kernel.org/show_bug.cgi?id=196907
+	 * Some Dell XPS13 9360 cannot do suspend-to-idle using the Low Power
+	 * S0 Idle firmware interface.
+	 */
+	{
+	.callback = init_no_lps0,
+	.ident = "Dell XPS13 9360",
+	.matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+		DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9360"),
+		},
+	},
 	{},
 };
 
@@ -485,6 +506,7 @@ static void acpi_pm_end(void)
 }
 #else /* !CONFIG_ACPI_SLEEP */
 #define acpi_target_sleep_state	ACPI_STATE_S0
+#define acpi_sleep_no_lps0	(false)
 static inline void acpi_sleep_dmi_check(void) {}
 #endif /* CONFIG_ACPI_SLEEP */
 
@@ -702,6 +724,12 @@ static int lps0_device_attach(struct acp
 	if (lps0_device_handle)
 		return 0;
 
+	if (acpi_sleep_no_lps0) {
+		acpi_handle_info(adev->handle,
+				 "Low Power S0 Idle interface disabled\n");
+		return 0;
+	}
+
 	if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0))
 		return 0;
 


Patches currently in stable-queue which might be from rafael.j.wysocki@intel.com are

queue-4.13/acpi-pm-blacklist-low-power-s0-idle-_dsm-for-dell-xps13-9360.patch
queue-4.13/acpica-make-it-possible-to-enable-runtime-gpes-earlier.patch
queue-4.13/acpica-dispatch-active-gpes-at-init-time.patch
queue-4.13/acpi-scan-enable-gpes-before-scanning-the-namespace.patch