[PATCH 5/9] ACPI: Add support for new refcounted GPE API to drivers

Rafael J. Wysocki
2010-01-10T13:39:13Z

From: Matthew Garrett <mjg@redhat.com>

Add GPE refcounting support to ACPI drivers that need it. This will
currently do little until the core is changed over to use the new
behaviour.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by; Rafael J. Wysocki <rjw@sisk.pl>
---
drivers/acpi/button.c | 12 ++++++++++++
drivers/acpi/button.c | 12 ++++++++++++
drivers/acpi/ec.c | 4 +++-
drivers/acpi/wakeup.c | 6 ++++++
3 files changed, 21 insertions(+), 1 deletion(-)

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 +427,10 @@ 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_ref_runtime_gpe(device->wakeup.gpe_device,
+ device->wakeup.gpe_number);
+ acpi_ref_wakeup_gpe(device->wakeup.gpe_device,
+ device->wakeup.gpe_number);
device->wakeup.state.enabled = 1;
}

@@ -446,6 +450,14 @@ static int acpi_button_remove(struct acp
{
struct acpi_button *button = acpi_driver_data(device);

+ if (device->wakeup.flags.valid) {
+ acpi_unref_runtime_gpe(device->wakeup.gpe_device,
+ device->wakeup.gpe_number);
+ acpi_unref_wakeup_gpe(device->wakeup.gpe_device,
+ device->wakeup.gpe_number);
+ 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
@@ -755,7 +755,7 @@ 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_ref_runtime_gpe(NULL, ec->gpe);
status = acpi_install_address_space_handler(ec->handle,
ACPI_ADR_SPACE_EC,
&acpi_ec_space_handler,
@@ -772,6 +772,7 @@ static int ec_install_handlers(struct ac
} else {
acpi_remove_gpe_handler(NULL, ec->gpe,
&acpi_ec_gpe_handler);
+ acpi_unref_runtime_gpe(NULL, ec->gpe);
return -ENODEV;
}
}
@@ -782,6 +783,7 @@ static int ec_install_handlers(struct ac

static void ec_remove_handlers(struct acpi_ec *ec)
{
+ acpi_unref_runtime_gpe(NULL, ec->gpe);
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/wakeup.c
===================================================================
--- linux-2.6.orig/drivers/acpi/wakeup.c
+++ linux-2.6/drivers/acpi/wakeup.c
@@ -81,6 +81,8 @@ void acpi_enable_wakeup_device(u8 sleep_
if (!dev->wakeup.flags.run_wake)
acpi_enable_gpe(dev->wakeup.gpe_device,
dev->wakeup.gpe_number);
+ acpi_ref_wakeup_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number);
}
}

@@ -121,6 +123,8 @@ void acpi_disable_wakeup_device(u8 sleep
acpi_clear_gpe(dev->wakeup.gpe_device,
dev->wakeup.gpe_number, ACPI_NOT_ISR);
}
+ acpi_unref_wakeup_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number);
}
}

@@ -141,6 +145,8 @@ int __init acpi_wakeup_device_init(void)
ACPI_GPE_TYPE_WAKE_RUN);
acpi_enable_gpe(dev->wakeup.gpe_device,
dev->wakeup.gpe_number);
+ acpi_ref_wakeup_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number);
dev->wakeup.state.enabled = 1;
}
mutex_unlock(&acpi_device_lock);