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%3Ba=su...

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