ACPI: save device_type in acpi_device

Most uses of the ACPI bus device_type (ACPI_BUS_TYPE_DEVICE,
ACPI_BUS_TYPE_POWER, etc) are during device initialization, but
we do need it later for notify handler installation, since that
is different for fixed hardware devices vs. namespace devices.

This patch saves the device_type in the acpi_device structure,
so we can check that rather than comparing against the _HID string.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

2 files changed, 3 insertions, 1 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index ab5a26469707..c73681b7e69e 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1240,6 +1240,7 @@ acpi_add_single_object(struct acpi_device **child,
                 return -ENOMEM;
         }
 
+        device->device_type = type;
         device->handle = handle;
         device->parent = parent;
         device->bus_ops = *ops; /* workround for not call .start */
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 1cef1398e358..8456e8cbf9fd 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -262,7 +262,8 @@ struct acpi_device_wakeup {
 /* Device */
 
 struct acpi_device {
-        acpi_handle handle;
+        int device_type;
+        acpi_handle handle;             /* no handle for fixed hardware */
         struct acpi_device *parent;
         struct list_head children;
         struct list_head node;