diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 92c973a..7fcc844 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -427,7 +427,7 @@ static void acpi_memory_device_notify(acpi_handle handle, u32 event, void *data)
 		/*
 		 * Invoke acpi_bus_trim() to remove memory device
 		 */
-		acpi_bus_trim(device, 1);
+		acpi_bus_trim(device, 1, 0);
 
 		/* _EJ0 succeeded; _OST is not necessary */
 		return;
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index ae4ebf2..9e37b49 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -345,7 +345,7 @@ static void dock_remove_acpi_device(acpi_handle handle)
 	int ret;
 
 	if (!acpi_bus_get_device(handle, &device)) {
-		ret = acpi_bus_trim(device, 1);
+		ret = acpi_bus_trim(device, 1, 0);
 		if (ret)
 			pr_debug("error removing bus, %x\n", -ret);
 	}
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 95ff1e8..b1001a4 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -121,7 +121,12 @@ void acpi_bus_hot_remove_device(void *context)
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 		"Hot-removing device %s...\n", dev_name(&device->dev)));
 
-	if (acpi_bus_trim(device, 1)) {
+	if (acpi_bus_trim(device, 1, 1)) {
+		pr_err("Preparing to removing device failed\n");
+		goto err_out;
+	}
+
+	if (acpi_bus_trim(device, 1, 0)) {
 		printk(KERN_ERR PREFIX
 				"Removing device failed\n");
 		goto err_out;
@@ -1347,6 +1352,19 @@ static int acpi_device_set_context(struct acpi_device *device)
 	return -ENODEV;
 }
 
+static int acpi_bus_prepare_remove(struct acpi_device *dev)
+{
+	int ret = 0;
+
+	if (!dev)
+		return -EINVAL;
+
+	if (dev->driver && dev->driver->ops.prepare_remove)
+		ret = dev->driver->ops.prepare_remove(dev);
+
+	return ret;
+}
+
 static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
 {
 	if (!dev)
@@ -1640,7 +1658,11 @@ int acpi_bus_start(struct acpi_device *device)
 }
 EXPORT_SYMBOL(acpi_bus_start);
 
-int acpi_bus_trim(struct acpi_device *start, int rmdevice)
+/* acpi_bus_trim: Remove or prepare to remove a device and its children.
+ * @device: the device to remove or prepare to remove from.
+ * @prepare: If 1, prepare for removal. If 0, perform actual removal.
+ */
+int acpi_bus_trim(struct acpi_device *start, int rmdevice, int prepare)
 {
 	acpi_status status;
 	struct acpi_device *parent, *child;
@@ -1667,7 +1689,11 @@ int acpi_bus_trim(struct acpi_device *start, int rmdevice)
 			child = parent;
 			parent = parent->parent;
 
-			if (level == 0)
+			if (prepare) {
+				err = acpi_bus_prepare_remove(child);
+				if (err)
+					return err;
+			} else if (level == 0)
 				err = acpi_bus_remove(child, rmdevice);
 			else
 				err = acpi_bus_remove(child, 1);
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 3d6d4fd..bc10b61 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -748,7 +748,7 @@ static int acpiphp_bus_add(struct acpiphp_func *func)
 		/* this shouldn't be in here, so remove
 		 * the bus then re-add it...
 		 */
-		ret_val = acpi_bus_trim(device, 1);
+		ret_val = acpi_bus_trim(device, 1, 0);
 		dbg("acpi_bus_trim return %x\n", ret_val);
 	}
 
@@ -781,7 +781,7 @@ static int acpiphp_bus_trim(acpi_handle handle)
 		return retval;
 	}
 
-	retval = acpi_bus_trim(device, 1);
+	retval = acpi_bus_trim(device, 1, 0);
 	if (retval)
 		err("cannot remove from acpi list\n");
 
diff --git a/drivers/pci/hotplug/sgi_hotplug.c b/drivers/pci/hotplug/sgi_hotplug.c
index f64ca92..3655de3 100644
--- a/drivers/pci/hotplug/sgi_hotplug.c
+++ b/drivers/pci/hotplug/sgi_hotplug.c
@@ -539,7 +539,7 @@ static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
 				ret = acpi_bus_get_device(chandle,
 							  &device);
 				if (ACPI_SUCCESS(ret))
-					acpi_bus_trim(device, 1);
+					acpi_bus_trim(device, 1, 0);
 			}
 		}
 
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 6ef1692..063c470 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -359,7 +359,7 @@ void acpi_bus_unregister_driver(struct acpi_driver *driver);
 int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
 		 acpi_handle handle, int type);
 void acpi_bus_hot_remove_device(void *context);
-int acpi_bus_trim(struct acpi_device *start, int rmdevice);
+int acpi_bus_trim(struct acpi_device *start, int rmdevice, int prepare);
 int acpi_bus_start(struct acpi_device *device);
 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 int acpi_match_device_ids(struct acpi_device *device,