[10/15] usb: dwc3: gadget: Set maxpacket size for ep0 IN

[Felipe Balbi <balbi@kernel.org>]

Hi,

Thinh Nguyen <Thinh.Nguyen@synopsys.com> writes:
> There are 2 control endpoint structures for DWC3. However, the driver
> only updates the OUT direction control endpoint structure during
> ConnectDone event. DWC3 driver needs to update the endpoint max packet
> size for control IN endpoint as well. If the max packet size is not
> properly set, then the driver will incorrectly calculate the data
> transfer size and fail to send ZLP for HS/FS 3-stage control read
> transfer.
>
> The fix is simply to update the max packet size for the ep0 IN direction
> during ConnectDone event.
>
> Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
> ---
>  drivers/usb/dwc3/gadget.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> index bdf2a2014ebd..6ae924d95cbc 100644
> --- a/drivers/usb/dwc3/gadget.c
> +++ b/drivers/usb/dwc3/gadget.c
> @@ -2751,6 +2751,8 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
>  		break;
>  	}
>  
> +	dwc->eps[1]->endpoint.maxpacket = dwc->gadget.ep0->maxpacket;

thanks :-) I've had that on my list for a while but never got to it
since it has no real effects other than reporting properly on
tracepoints :-)