From: Rafael J. Wysocki <rjw@xxxxxxx>
Add GPE refcounting support to the existing GPE users. This will
currently do little until the core is changed over to fully
implement the new behaviour.
Based on a patch from Matthew Garrett <mjg@xxxxxxxxxx>.
Signed-off-by: Matthew Garrett <mjg@xxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
---
drivers/acpi/button.c | 10 ++++++++++
drivers/acpi/ec.c | 4 +++-
drivers/acpi/sleep.c | 15 ++++++++++++---
drivers/acpi/wakeup.c | 2 ++
4 files changed, 27 insertions(+), 4 deletions(-)
Index: linux-2.6/drivers/acpi/button.c
===================================================================
--- linux-2.6.orig/drivers/acpi/button.c
+++ linux-2.6/drivers/acpi/button.c
@@ -427,6 +427,9 @@ static int acpi_button_add(struct acpi_d
ACPI_GPE_TYPE_WAKE_RUN);
acpi_enable_gpe(device->wakeup.gpe_device,
device->wakeup.gpe_number);
+ acpi_get_gpe(device->wakeup.gpe_device,
+ device->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE_RUN);
device->wakeup.state.enabled = 1;
}
@@ -446,6 +449,13 @@ static int acpi_button_remove(struct acp
{
struct acpi_button *button = acpi_driver_data(device);
+ if (device->wakeup.flags.valid) {
+ acpi_put_gpe(device->wakeup.gpe_device,
+ device->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE_RUN);
+ device->wakeup.state.enabled = 0;
+ }
+
acpi_button_remove_fs(device);
input_unregister_device(button->input);
kfree(button);
Index: linux-2.6/drivers/acpi/ec.c
===================================================================
--- linux-2.6.orig/drivers/acpi/ec.c
+++ linux-2.6/drivers/acpi/ec.c
@@ -789,7 +789,7 @@ static int ec_install_handlers(struct ac
if (ACPI_FAILURE(status))
return -ENODEV;
acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
- acpi_enable_gpe(NULL, ec->gpe);
+ acpi_get_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
status = acpi_install_address_space_handler(ec->handle,
ACPI_ADR_SPACE_EC,
&acpi_ec_space_handler,
@@ -806,6 +806,7 @@ static int ec_install_handlers(struct ac
} else {
acpi_remove_gpe_handler(NULL, ec->gpe,
&acpi_ec_gpe_handler);
+ acpi_put_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
return -ENODEV;
}
}
@@ -816,6 +817,7 @@ static int ec_install_handlers(struct ac
static void ec_remove_handlers(struct acpi_ec *ec)
{
+ acpi_put_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle,
ACPI_ADR_SPACE_EC, &acpi_ec_space_handler)))
pr_err(PREFIX "failed to remove space handler\n");
Index: linux-2.6/drivers/acpi/sleep.c
===================================================================
--- linux-2.6.orig/drivers/acpi/sleep.c
+++ linux-2.6/drivers/acpi/sleep.c
@@ -745,9 +745,18 @@ int acpi_pm_device_sleep_wake(struct dev
return -ENODEV;
}
- error = enable ?
- acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
- acpi_disable_wakeup_device_power(adev);
+ if (enable) {
+ error = acpi_enable_wakeup_device_power(adev,
+ acpi_target_sleep_state);
+ if (!error)
+ acpi_get_gpe(adev->wakeup.gpe_device,
+ adev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE);
+ } else {
+ acpi_put_gpe(adev->wakeup.gpe_device, adev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE);
+ error = acpi_disable_wakeup_device_power(adev);
+ }
if (!error)
dev_info(dev, "wake-up capability %s by ACPI\n",
enable ? "enabled" : "disabled");
Index: linux-2.6/drivers/acpi/wakeup.c
===================================================================
--- linux-2.6.orig/drivers/acpi/wakeup.c
+++ linux-2.6/drivers/acpi/wakeup.c
@@ -141,6 +141,8 @@ int __init acpi_wakeup_device_init(void)
ACPI_GPE_TYPE_WAKE_RUN);
acpi_enable_gpe(dev->wakeup.gpe_device,
dev->wakeup.gpe_number);
+ acpi_get_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE);
dev->wakeup.state.enabled = 1;
}
mutex_unlock(&acpi_device_lock);
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