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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-12-13 00:51:58 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-12-13 00:51:58 +0300
commit175f8e2650f7ca6b33d338be3ccc1c00e89594ea (patch)
tree7a81830a3fd4a2da4db45d2dd791493a2ac6d5de /drivers/acpi/device_pm.c
parentc52fa70c79acbb1d4868fee244a638d6ee6f5aab (diff)
downloadlinux-175f8e2650f7ca6b33d338be3ccc1c00e89594ea.tar.xz
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 <venkat.raghavulu@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/device_pm.c')
-rw-r--r--drivers/acpi/device_pm.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 076af8149566..e6ff33ecd784 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;