On Fri, 2021-11-26 at 19:09 +0800, Neal Liu wrote:
>
> diff --git a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
> b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
> index 74ea36c19b1e..bea9cbb191a2 100644
> --- a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
> +++ b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
> @@ -251,6 +251,13 @@ static void ast_vhub_ep0_do_receive(struct
> ast_vhub_ep *ep, struct ast_vhub_req
> len = remain;
> rc = -EOVERFLOW;
> }
> +
> + /* HW return wrong data len */
> + if (len < ep->ep.maxpacket && len != remain) {
> + EPDBG(ep, "using expected data len instead\n");
> + len = remain;
> + }
> +
Wow, that is a nasty hw bug ! Patch looks good, I had to swap some of
that logic back into my brain but it looks like it won't break any
normal case :-)
Acked-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cheers,
Ben.
