From 175f8e2650f7ca6b33d338be3ccc1c00e89594ea Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Fri, 12 Dec 2014 22:51:58 +0100 Subject: [PATCH] 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: Venkat Raghavulu Signed-off-by: Rafael J. Wysocki --- drivers/acpi/device_pm.c | 12 ++++++++++-- include/acpi/acpi_bus.h | 1 + 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index 076af81..e6ff33e 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -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 { - acpi_disable_gpe(wakeup->gpe_device, wakeup->gpe_number); + 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; diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index f34a083..8de31d4 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -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 { -- 2.7.4