1 files changed, 40 insertions, 0 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 5049230ccf49..0a13d954daed 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -837,6 +837,42 @@ acpi_video_bus_match(struct acpi_device *device)
         return -ENODEV;
 }
 
+/*
+ * acpi_bay_match - see if a device is an ejectable driver bay
+ *
+ * If an acpi object is ejectable and has one of the ACPI ATA methods defined,
+ * then we can safely call it an ejectable drive bay
+ */
+static int acpi_bay_match(struct acpi_device *device){
+        acpi_status status;
+        acpi_handle handle;
+        acpi_handle tmp;
+        acpi_handle phandle;
+
+        handle = device->handle;
+
+        status = acpi_get_handle(handle, "_EJ0", &tmp);
+        if (ACPI_FAILURE(status))
+                return -ENODEV;
+
+        if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
+                (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
+                (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
+                (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
+                return 0;
+
+        if (acpi_get_parent(handle, &phandle))
+                return -ENODEV;
+
+        if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) ||
+                (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) ||
+                (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) ||
+                (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp))))
+                return 0;
+
+        return -ENODEV;
+}
+
 static void acpi_device_set_id(struct acpi_device *device,
                                struct acpi_device *parent, acpi_handle handle,
                                int type)
@@ -872,6 +908,10 @@ static void acpi_device_set_id(struct acpi_device *device,
                         status = acpi_video_bus_match(device);
                         if(ACPI_SUCCESS(status))
                                 hid = ACPI_VIDEO_HID;
+
+                        status = acpi_bay_match(device);
+                        if (ACPI_SUCCESS(status))
+                                hid = ACPI_BAY_HID;
                 }
                 break;
         case ACPI_BUS_TYPE_POWER: