[PATCH] usb/gadget: aspeed-vhub: add USB_LIBCOMPOSITE dependency

[Benjamin Herrenschmidt]

On Fri, 2018-05-25 at 18:07 +0200, Arnd Bergmann wrote:
> Without that option, we run into a link failure:
> 
> drivers/usb/gadget/udc/aspeed-vhub/hub.o: In function `ast_vhub_std_hub_request':
> hub.c:(.text+0x5b0): undefined reference to `usb_gadget_get_string'

Thanks ! I hadn't realized these functions were part of an optional
library.

> Fixes: 7ecca2a4080c ("usb/gadget: Add driver for Aspeed SoC virtual hub")
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>

Acked-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>

> ---
>  drivers/usb/gadget/udc/aspeed-vhub/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/usb/gadget/udc/aspeed-vhub/Kconfig b/drivers/usb/gadget/udc/aspeed-vhub/Kconfig
> index f0cdf89b8503..83ba8a2eb6af 100644
> --- a/drivers/usb/gadget/udc/aspeed-vhub/Kconfig
> +++ b/drivers/usb/gadget/udc/aspeed-vhub/Kconfig
> @@ -2,6 +2,7 @@
>  config USB_ASPEED_VHUB
>  	tristate "Aspeed vHub UDC driver"
>  	depends on ARCH_ASPEED || COMPILE_TEST
> +	depends on USB_LIBCOMPOSITE
>  	help
>  	  USB peripheral controller for the Aspeed AST2500 family
>  	  SoCs supporting the "vHub" functionality and USB2.0