fbdev: fbcon: Console unregistration from unregister_framebuffer

index 51bd430..4a7f800 100644
@@ -3003,6 +3003,45 @@ static int fbcon_mode_deleted(struct fb_
 	return found;
 }
 
+#ifdef CONFIG_VT_HW_CONSOLE_BINDING
+static int fbcon_unbind(void)
+{
+	int ret;
+
+	ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
+				fbcon_is_default);
+	return ret;
+}
+#else
+static fbcon_unbind(void)
+{
+	return -EINVAL;
+}
+#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
+
+static int fbcon_fb_unbind(int idx)
+{
+	int i, new_idx = -1, ret = 0;
+
+	for (i = first_fb_vc; i <= last_fb_vc; i++) {
+		if (con2fb_map[i] != idx &&
+		    con2fb_map[i] != -1) {
+			new_idx = i;
+			break;
+		}
+	}
+
+	if (new_idx != -1) {
+		for (i = first_fb_vc; i <= last_fb_vc; i++) {
+			if (con2fb_map[i] == idx)
+				set_con2fb_map(i, new_idx, 0);
+		}
+	} else
+		ret = fbcon_unbind();
+
+	return ret;
+}
+
 static int fbcon_fb_unregistered(struct fb_info *info)
 {
 	int i, idx = info->node;

@@ -3210,6 +3249,9 @@ static int fbcon_event_notify(struct not
 		mode = event->data;
 		ret = fbcon_mode_deleted(info, mode);
 		break;
+	case FB_EVENT_FB_UNBIND:
+		ret = fbcon_fb_unbind(info->node);
+		break;
 	case FB_EVENT_FB_REGISTERED:
 		ret = fbcon_fb_registered(info);
 		break;

index 8d6dbe8..7f3a0cc 100644
@@ -1334,17 +1334,34 @@ register_framebuffer(struct fb_info *fb_
  *
  *	Returns negative errno on error, or zero for success.
  *
+ *      This function will also notify the framebuffer console
+ *      to release the driver.
+ *
+ *      This is meant to be called within a driver's module_exit()
+ *      function. If this is called outside module_exit(), ensure
+ *      that the driver implements fb_open() and fb_release() to
+ *      check that no processes are using the device.
  */
 
 int
 unregister_framebuffer(struct fb_info *fb_info)
 {
 	struct fb_event event;
-	int i;
+	int i, ret = 0;
 
 	i = fb_info->node;
-	if (!registered_fb[i])
-		return -EINVAL;
+	if (!registered_fb[i]) {
+		ret = -EINVAL;
+		goto done;
+	}
+
+	event.info = fb_info;
+	ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
+
+	if (ret) {
+		ret = -EINVAL;
+		goto done;
+	}
 
 	if (fb_info->pixmap.addr &&
 	    (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))

@@ -1356,7 +1373,8 @@ unregister_framebuffer(struct fb_info *f
 	device_destroy(fb_class, MKDEV(FB_MAJOR, i));
 	event.info = fb_info;
 	fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
-	return 0;
+done:
+	return ret;
 }
 
 /**

index 6622682..8628423 100644
@@ -529,6 +529,8 @@ #define FB_EVENT_MODE_CHANGE_ALL	0x0B
 #define FB_EVENT_CONBLANK               0x0C
 /*      Get drawing requirements        */
 #define FB_EVENT_GET_REQ                0x0D
+/*      Unbind from the console if possible */
+#define FB_EVENT_FB_UNBIND              0x0E
 
 struct fb_event {
 	struct fb_info *info;