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path: root/drivers/acpi/acpica/evxfgpe.c
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Diffstat (limited to 'drivers/acpi/acpica/evxfgpe.c')
-rw-r--r--drivers/acpi/acpica/evxfgpe.c67
1 files changed, 47 insertions, 20 deletions
diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c
index e9562a7cb2f9..52aaff3df562 100644
--- a/drivers/acpi/acpica/evxfgpe.c
+++ b/drivers/acpi/acpica/evxfgpe.c
@@ -198,7 +198,9 @@ acpi_setup_gpe_for_wake(acpi_handle wake_device,
acpi_status status = AE_BAD_PARAMETER;
struct acpi_gpe_event_info *gpe_event_info;
struct acpi_namespace_node *device_node;
+ struct acpi_gpe_notify_object *notify_object;
acpi_cpu_flags flags;
+ u8 gpe_dispatch_mask;
ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake);
@@ -212,37 +214,62 @@ acpi_setup_gpe_for_wake(acpi_handle wake_device,
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+ /* Ensure that we have a valid GPE number */
+
+ gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
+ if (!gpe_event_info) {
+ goto unlock_and_exit;
+ }
+
+ if (wake_device == ACPI_ROOT_OBJECT) {
+ goto out;
+ }
+
+ /*
+ * If there is no method or handler for this GPE, then the
+ * wake_device will be notified whenever this GPE fires (aka
+ * "implicit notify") Note: The GPE is assumed to be
+ * level-triggered (for windows compatibility).
+ */
+ gpe_dispatch_mask = gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK;
+ if (gpe_dispatch_mask != ACPI_GPE_DISPATCH_NONE
+ && gpe_dispatch_mask != ACPI_GPE_DISPATCH_NOTIFY) {
+ goto out;
+ }
+
/* Validate wake_device is of type Device */
device_node = ACPI_CAST_PTR(struct acpi_namespace_node, wake_device);
if (device_node->type != ACPI_TYPE_DEVICE) {
- return_ACPI_STATUS(AE_BAD_PARAMETER);
+ goto unlock_and_exit;
}
- flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+ if (gpe_dispatch_mask == ACPI_GPE_DISPATCH_NONE) {
+ gpe_event_info->flags = (ACPI_GPE_DISPATCH_NOTIFY |
+ ACPI_GPE_LEVEL_TRIGGERED);
+ gpe_event_info->dispatch.device.node = device_node;
+ gpe_event_info->dispatch.device.next = NULL;
+ } else {
+ /* There are multiple devices to notify implicitly. */
- /* Ensure that we have a valid GPE number */
-
- gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
- if (gpe_event_info) {
- /*
- * If there is no method or handler for this GPE, then the
- * wake_device will be notified whenever this GPE fires (aka
- * "implicit notify") Note: The GPE is assumed to be
- * level-triggered (for windows compatibility).
- */
- if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
- ACPI_GPE_DISPATCH_NONE) {
- gpe_event_info->flags =
- (ACPI_GPE_DISPATCH_NOTIFY |
- ACPI_GPE_LEVEL_TRIGGERED);
- gpe_event_info->dispatch.device_node = device_node;
+ notify_object = ACPI_ALLOCATE_ZEROED(sizeof(*notify_object));
+ if (!notify_object) {
+ status = AE_NO_MEMORY;
+ goto unlock_and_exit;
}
- gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
- status = AE_OK;
+ notify_object->node = device_node;
+ notify_object->next = gpe_event_info->dispatch.device.next;
+ gpe_event_info->dispatch.device.next = notify_object;
}
+ out:
+ gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
+ status = AE_OK;
+
+ unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}