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Rajat Jain authored
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 f941d3e4 ("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-dev.1.auto *disabled platform:cros-ec-accel.0 *disabled platform:cros-ec-accel.1 *disabled platform:cros-ec-gyro.0 *disabled platform:cros-ec-ring.0 *disabled platform:cros-usbpd-charger.2.auto *disabled platform:cros-usbpd-logger.3.auto 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 acpi_sleep_prepare()]. 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 f941d3e4 ("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: f941d3e4 ("ACPI: EC / PM: Disable non-wakeup GPEs for suspend-to-idle") Link: https://bugzilla.kernel.org/show_bug.cgi?id=203579Signed-off-by:
Rajat Jain <rajatja@google.com> [ rjw: Subject & changelog ] Cc: 5.0+ <stable@vger.kernel.org> # 5.0+ Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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