Merge branch 'gpe-defer' into release

[net-next-2.6.git] / drivers / acpi / scan.c

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index f87f04603b68f2c106184fa0a71b62afab503d77..2b6c21d86b9885571b41679586636fff3b6c53bb 100644 (file)
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -26,6 +26,8 @@ extern struct acpi_device *acpi_root;
 
 #define ACPI_IS_ROOT_DEVICE(device)    (!(device)->parent)
 
+static const char *dummy_hid = "device";
+
 static LIST_HEAD(acpi_device_list);
 static LIST_HEAD(acpi_bus_id_list);
 DEFINE_MUTEX(acpi_device_lock);
@@ -49,6 +51,9 @@ static int create_modalias(struct acpi_device *acpi_dev, char *modalias,
        int count;
        struct acpi_hardware_id *id;
 
+       if (list_empty(&acpi_dev->pnp.ids))
+               return 0;
+
        len = snprintf(modalias, size, "acpi:");
        size -= len;
 
@@ -202,13 +207,15 @@ static int acpi_device_setup_files(struct acpi_device *dev)
                        goto end;
        }
 
-       result = device_create_file(&dev->dev, &dev_attr_hid);
-       if (result)
-               goto end;
+       if (!list_empty(&dev->pnp.ids)) {
+               result = device_create_file(&dev->dev, &dev_attr_hid);
+               if (result)
+                       goto end;
 
-       result = device_create_file(&dev->dev, &dev_attr_modalias);
-       if (result)
-               goto end;
+               result = device_create_file(&dev->dev, &dev_attr_modalias);
+               if (result)
+                       goto end;
+       }
 
         /*
          * If device has _EJ0, 'eject' file is created that is used to trigger
@@ -316,6 +323,9 @@ static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
        struct acpi_device *acpi_dev = to_acpi_device(dev);
        int len;
 
+       if (list_empty(&acpi_dev->pnp.ids))
+               return 0;
+
        if (add_uevent_var(env, "MODALIAS="))
                return -ENOMEM;
        len = create_modalias(acpi_dev, &env->buf[env->buflen - 1],
@@ -1010,10 +1020,13 @@ static int acpi_dock_match(struct acpi_device *device)
        return acpi_get_handle(device->handle, "_DCK", &tmp);
 }
 
-char *acpi_device_hid(struct acpi_device *device)
+const char *acpi_device_hid(struct acpi_device *device)
 {
        struct acpi_hardware_id *hid;
 
+       if (list_empty(&device->pnp.ids))
+               return dummy_hid;
+
        hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list);
        return hid->id;
 }
@@ -1142,16 +1155,6 @@ static void acpi_device_set_id(struct acpi_device *device)
                acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF);
                break;
        }
-
-       /*
-        * We build acpi_devices for some objects that don't have _HID or _CID,
-        * e.g., PCI bridges and slots.  Drivers can't bind to these objects,
-        * but we do use them indirectly by traversing the acpi_device tree.
-        * This generic ID isn't useful for driver binding, but it provides
-        * the useful property that "every acpi_device has an ID."
-        */
-       if (list_empty(&device->pnp.ids))
-               acpi_add_id(device, "device");
 }
 
 static int acpi_device_set_context(struct acpi_device *device)