1 files changed, 20 insertions, 10 deletions

diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index 9c5929a..cbf1f12 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -81,7 +81,7 @@ MODULE_DESCRIPTION("ACPI Processor Driver");
 MODULE_LICENSE("GPL");
 
 static int acpi_processor_add(struct acpi_device *device);
-static int acpi_processor_remove(struct acpi_device *device, int type);
+static int acpi_processor_remove(struct acpi_device *device);
 static void acpi_processor_notify(struct acpi_device *device, u32 event);
 static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr);
 static int acpi_processor_handle_eject(struct acpi_processor *pr);
@@ -610,7 +610,7 @@ err_free_pr:
 	return result;
 }
 
-static int acpi_processor_remove(struct acpi_device *device, int type)
+static int acpi_processor_remove(struct acpi_device *device)
 {
 	struct acpi_processor *pr = NULL;
 
@@ -623,7 +623,7 @@ static int acpi_processor_remove(struct acpi_device *device, int type)
 	if (pr->id >= nr_cpu_ids)
 		goto free;
 
-	if (type == ACPI_BUS_REMOVAL_EJECT) {
+	if (device->removal_type == ACPI_BUS_REMOVAL_EJECT) {
 		if (acpi_processor_handle_eject(pr))
 			return -EINVAL;
 	}
@@ -683,8 +683,11 @@ static void acpi_processor_hotplug_notify(acpi_handle handle,
 	struct acpi_device *device = NULL;
 	struct acpi_eject_event *ej_event = NULL;
 	u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */
+	acpi_status status;
 	int result;
 
+	acpi_scan_lock_acquire();
+
 	switch (event) {
 	case ACPI_NOTIFY_BUS_CHECK:
 	case ACPI_NOTIFY_DEVICE_CHECK:
@@ -733,25 +736,32 @@ static void acpi_processor_hotplug_notify(acpi_handle handle,
 			break;
 		}
 
+		get_device(&device->dev);
 		ej_event->device = device;
 		ej_event->event = ACPI_NOTIFY_EJECT_REQUEST;
-		acpi_os_hotplug_execute(acpi_bus_hot_remove_device,
-					(void *)ej_event);
-
-		/* eject is performed asynchronously */
-		return;
+		/* The eject is carried out asynchronously. */
+		status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device,
+						 ej_event);
+		if (ACPI_FAILURE(status)) {
+			put_device(&device->dev);
+			kfree(ej_event);
+			break;
+		}
+		goto out;
 
 	default:
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 				  "Unsupported event [0x%x]\n", event));
 
 		/* non-hotplug event; possibly handled by other handler */
-		return;
+		goto out;
 	}
 
 	/* Inform firmware that the hotplug operation has completed */
 	(void) acpi_evaluate_hotplug_ost(handle, event, ost_code, NULL);
-	return;
+
+ out:
+	acpi_scan_lock_release();
 }
 
 static acpi_status is_processor_device(acpi_handle handle)