Re: [PATCH v4] usb: gadget: f_fs: add capability for dfu run-time descriptor

[Matthew Wilcox]

On Sun, Aug 04, 2024 at 08:06:40PM -0400, crwulff@xxxxxxxxx wrote:
> diff --git a/include/uapi/linux/usb/ch9.h b/include/uapi/linux/usb/ch9.h
> index 44d73ba8788d..91f0f7e214a5 100644
> --- a/include/uapi/linux/usb/ch9.h
> +++ b/include/uapi/linux/usb/ch9.h
> @@ -254,6 +254,9 @@ struct usb_ctrlrequest {
>  #define USB_DT_DEVICE_CAPABILITY	0x10
>  #define USB_DT_WIRELESS_ENDPOINT_COMP	0x11
>  #define USB_DT_WIRE_ADAPTER		0x21
> +/* From USB Device Firmware Upgrade Specification, Revision 1.1 */
> +#define USB_DT_DFU_FUNCTIONAL		0x21

This is the only place in the entire patch where you explain what "DFU"
means.  Is this really such a well-known acronym that it doesn't need to
be in the documentation or the commit message?