diff --git a/drivers/staging/greybus/raw.c b/drivers/staging/greybus/raw.c
index 47a984554681..459aed0f1240 100644
--- a/drivers/staging/greybus/raw.c
+++ b/drivers/staging/greybus/raw.c
@@ -21,6 +21,8 @@ struct gb_raw {
 	struct list_head list;
 	int list_data;
 	struct mutex list_lock;
+	struct rw_semaphore disconnect_lock;
+	bool disconnected;
 	struct cdev cdev;
 	struct device dev;
 };
@@ -200,6 +202,7 @@ static int gb_raw_probe(struct gb_bundle *bundle,
 
 	INIT_LIST_HEAD(&raw->list);
 	mutex_init(&raw->list_lock);
+	init_rwsem(&raw->disconnect_lock);
 
 	raw->connection = connection;
 	greybus_set_drvdata(bundle, raw);
@@ -235,6 +238,11 @@ static void gb_raw_disconnect(struct gb_bundle *bundle)
 	struct raw_data *temp;
 
 	cdev_device_del(&raw->cdev, &raw->dev);
+
+	down_write(&raw->disconnect_lock);
+	raw->disconnected = true;
+	up_write(&raw->disconnect_lock);
+
 	gb_connection_disable(connection);
 	gb_connection_destroy(connection);
 
@@ -277,11 +285,22 @@ static ssize_t raw_write(struct file *file, const char __user *buf,
 	if (count > MAX_PACKET_SIZE)
 		return -E2BIG;
 
+	down_read(&raw->disconnect_lock);
+
+	if (raw->disconnected) {
+		retval = -ENODEV;
+		goto exit;
+	}
+
 	retval = gb_raw_send(raw, count, buf);
 	if (retval)
-		return retval;
+		goto exit;
 
-	return count;
+	retval = count;
+exit:
+	up_read(&raw->disconnect_lock);
+
+	return retval;
 }
 
 static ssize_t raw_read(struct file *file, char __user *buf, size_t count,