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Commit 175f8e26 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

ACPI / PM: Do not disable wakeup GPEs that have not been enabled 



In some cases acpi_device_wakeup() may be called to ensure wakeup
power to be off for a given device even though that device's wakeup
GPE has not been enabled so far.  It calls acpi_disable_gpe() on a
GPE that's not enabled and this causes ACPICA to return the AE_LIMIT
status code from that call which then is reported as an error by the
ACPICA's debug facilities (if enabled).  This may lead to a fair
amount of confusion, so introduce a new ACPI device wakeup flag
to store the wakeup GPE status and avoid disabling wakeup GPEs
that have not been enabled.

Reported-and-tested-by: default avatarVenkat Raghavulu <venkat.raghavulu@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent c52fa70c

drivers/acpi/device_pm.c

+10 −2
Original line number Diff line number Diff line
@@ -680,13 +680,21 @@ static int acpi_device_wakeup(struct acpi_device *adev, u32 target_state, 
		if (error)

			return error;



		if (adev->wakeup.flags.enabled)

			return 0;



		res = acpi_enable_gpe(wakeup->gpe_device, wakeup->gpe_number);

		if (ACPI_FAILURE(res)) {

		if (ACPI_SUCCESS(res)) {

			adev->wakeup.flags.enabled = 1;

		} else {

			acpi_disable_wakeup_device_power(adev);

			return -EIO;

		}

	} else {

		if (adev->wakeup.flags.enabled) {

			acpi_disable_gpe(wakeup->gpe_device, wakeup->gpe_number);

			adev->wakeup.flags.enabled = 0;

		}

		acpi_disable_wakeup_device_power(adev);

	}

	return 0;

include/acpi/acpi_bus.h

+1 −0
Original line number Diff line number Diff line
@@ -312,6 +312,7 @@ struct acpi_device_wakeup_flags { 
	u8 valid:1;		/* Can successfully enable wakeup? */

	u8 run_wake:1;		/* Run-Wake GPE devices */

	u8 notifier_present:1;  /* Wake-up notify handler has been installed */

	u8 enabled:1;		/* Enabled for wakeup */

};



struct acpi_device_wakeup_context {