dev: auto-generate device name in device_register if name is unspecified

dev/core.c

@@ -37,6 +37,18 @@ static kern_status_t set_root_device(struct device *dev)
 	return KERN_OK;
 }
 
+static kern_status_t device_generate_name(struct device *dev)
+{
+	switch (dev->dev_type) {
+	case DEV_TYPE_INPUT:
+		return input_device_generate_name(&dev->input);
+	default:
+		break;
+	}
+
+	return KERN_UNSUPPORTED;
+}
+
 kern_status_t device_init(void)
 {
 	object_type_register(&device_type);
@@ -157,6 +169,15 @@ kern_status_t device_register(struct device *dev, struct device *parent)
 
 	kern_status_t status = KERN_OK;
 
+	if (dev->dev_name[0] == 0) {
+		status = device_generate_name(dev);
+	}
+
+	if (status != KERN_OK) {
+		device_unlock_irqrestore(dev, flags);
+		return status;
+	}
+
 	queue_foreach (struct device, child, &dev->dev_children, dev_childent) {
 		if (!strcmp(dev->dev_name, child->dev_name)) {
 			status = KERN_NAME_EXISTS;