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Subject[PATCH 5.1 075/128] ACPI: PM: Set enable_for_wake for wakeup GPEs during suspend-to-idle
From: Rajat Jain <>

commit 2f844b61db8297a1f7a06adf2eb5c43381f2c183 upstream.

I noticed that recently multiple systems (chromebooks) couldn't wake
from S0ix using LID or Keyboard after updating to a newer kernel. I
bisected and it turned up commit f941d3e41da7 ("ACPI: EC / PM: Disable
non-wakeup GPEs for suspend-to-idle"). I checked that the issue got
fixed if that commit was reverted.

I debugged and found that although PNP0C0D:00 (representing the LID)
is wake capable and should wakeup the system per the code in
acpi_wakeup_gpe_init() and in drivers/acpi/button.c:

localhost /sys # cat /proc/acpi/wakeup
Device S-state Status Sysfs node
LID0 S4 *enabled platform:PNP0C0D:00
CREC S5 *disabled platform:GOOG0004:00
*disabled platform:cros-ec-accel.0
*disabled platform:cros-ec-accel.1
*disabled platform:cros-ec-gyro.0
*disabled platform:cros-ec-ring.0
D015 S3 *enabled i2c:i2c-ELAN0000:00
PENH S3 *enabled platform:PRP0001:00
XHCI S3 *enabled pci:0000:00:14.0
GLAN S4 *disabled
WIFI S3 *disabled pci:0000:00:14.3
localhost /sys #

On debugging, I found that its corresponding GPE is not being enabled.
The particular GPE's "gpe_register_info->enable_for_wake" does not
have any bits set when acpi_enable_all_wakeup_gpes() comes around to
use it. I looked at code and could not find any other code path that
should set the bits in "enable_for_wake" bitmask for the wake enabled
devices for s2idle. [I do see that it happens for S3 in

Thus I used the same call to enable the GPEs for wake enabled devices,
and verified that this fixes the regression I was seeing on multiple
of my devices.

[ rjw: The problem is that commit f941d3e41da7 ("ACPI: EC / PM:
Disable non-wakeup GPEs for suspend-to-idle") forgot to add
the acpi_enable_wakeup_devices() call for s2idle along with
acpi_enable_all_wakeup_gpes(). ]

Fixes: f941d3e41da7 ("ACPI: EC / PM: Disable non-wakeup GPEs for suspend-to-idle")
Signed-off-by: Rajat Jain <>
[ rjw: Subject & changelog ]
Cc: 5.0+ <> # 5.0+
Signed-off-by: Rafael J. Wysocki <>
Signed-off-by: Greg Kroah-Hartman <>

drivers/acpi/sleep.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -977,6 +977,8 @@ static int acpi_s2idle_prepare(void)
if (acpi_sci_irq_valid())

+ acpi_enable_wakeup_devices(ACPI_STATE_S0);
/* Change the configuration of GPEs to avoid spurious wakeup. */
@@ -1027,6 +1029,8 @@ static void acpi_s2idle_restore(void)

+ acpi_disable_wakeup_devices(ACPI_STATE_S0);
if (acpi_sci_irq_valid())

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