Re: [PATCH v2] usb: gadget: Increase max configuration interface to 32

[AKASH KUMAR]

Gentle Reminder!!!

On 5/21/2024 11:12 AM, Akash Kumar wrote:
> Currently, max configuration interfaces are limited to 16, which fails
> for compositions containing 10 UVC configurations with interrupt ep
> disabled along with other configurations , and we see bind failures
> while allocating interface ID in uvc bind.
>
> Increase max configuration interface to 32 to support any large
> compositions, limited to the same size as USB device endpoints, as
> interfaces cannot be more than endpoints.
>
> Signed-off-by: Akash Kumar <quic_akakum@xxxxxxxxxxx>
> ---
>   include/linux/usb/composite.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
> index 2040696d75b6..d6d4fbfb6d0e 100644
> --- a/include/linux/usb/composite.h
> +++ b/include/linux/usb/composite.h
> @@ -255,7 +255,7 @@ int config_ep_by_speed_and_alt(struct usb_gadget *g, struct usb_function *f,
>   int config_ep_by_speed(struct usb_gadget *g, struct usb_function *f,
>   			struct usb_ep *_ep);
>   
> -#define	MAX_CONFIG_INTERFACES		16	/* arbitrary; max 255 */
> +#define	MAX_CONFIG_INTERFACES		32
>   
>   /**
>    * struct usb_configuration - represents one gadget configuration