From 2421986b040a425cc93d51b75f80f1d8219fbe9e Mon Sep 17 00:00:00 2001 From: Thinh Nguyen Date: Fri, 12 Jan 2018 18:18:05 -0800 Subject: usb: dwc3: gadget: Set maxpacket size for ep0 IN commit 6180026341e852a250e1f97ebdcf71684a3c81b9 upstream. 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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/gadget.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/usb/dwc3/gadget.c') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index d3bd1afd6302..b6037a0ae829 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2393,6 +2393,8 @@ 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) -- cgit v1.2.3