From: Thinh Nguyen Date: Sat, 13 Jan 2018 02:18:05 +0000 (-0800) Subject: usb: dwc3: gadget: Set maxpacket size for ep0 IN X-Git-Tag: v4.16-rc3~19^2~2^2~18 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=6180026341e852a250e1f97ebdcf71684a3c81b9;p=uclinux-h8%2Flinux.git usb: dwc3: gadget: Set maxpacket size for ep0 IN 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. Cc: stable@vger.kernel.org Fixes: 72246da40f37 ("usb: Introduce DesignWare USB3 DRD Driver") Signed-off-by: Thinh Nguyen Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 616ef49ccb49..2bda4eb1e9ac 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2745,6 +2745,8 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) break; } + dwc->eps[1]->endpoint.maxpacket = dwc->gadget.ep0->maxpacket; + /* Enable USB2 LPM Capability */ if ((dwc->revision > DWC3_REVISION_194A) &&