On Mon, 18 Jan 2016, Peter Chen wrote: > > > Why can't the root_hub reuse dev->dev.of_node? > > > > Indeed, there's no need to add an .of_node field to struct usb_device, > > since the embedded struct device already contains an .of_node field. > > > > No, the usb_device needs the .of_node field. It already _has_ an .of_node field, in its embedded struct device. > The devices belong to platform bus contains device node. > The devices (usb device) belong to USB bus which are created > dynamically do not contain device node. I don't know what you mean. struct usb_device _does_ contain an embedded struct device. It doesn't matter the structures are created dynamically, statically, or any other way; this field is part of the structure definition. Suppose udev is a pointer to struct usb_device. Then udev->dev is a struct device and udev->dev.of_node is a pointer to struct device_node. You don't need to add a new udev->of_node field; just use udev->dev.of_node instead. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
