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-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=e05562277a05559c66476a1a32b4f43d493544a8 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. Fixes: 72246da40f37 ("usb: Introduce DesignWare USB3 DRD Driver") Signed-off-by: Thinh Nguyen Signed-off-by: Felipe Balbi [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings --- diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 33fe3d3bebbd..47b83584f284 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1821,6 +1821,8 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) break; } + dwc->eps[1]->endpoint.maxpacket = dwc->gadget.ep0->maxpacket; + /* Disable unneded PHY */ dwc3_gadget_disable_phy(dwc, dwc->gadget.speed);