From: Marek Szyprowski m.szyprowski@samsung.com
DWC3 hangs on OUT requests smaller than maxpacket size, so HACK the request length to be at least equal to maxpacket size.
Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- drivers/usb/dwc3/gadget.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index a497fbb..737cb3e 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -973,6 +973,14 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) req->epnum = dep->number;
/* + * DWC3 hangs on OUT requests smaller than maxpacket size, + * so HACK the request length + */ + if (dep->direction == 0 && + req->request.length < dep->endpoint.maxpacket) + req->request.length = dep->endpoint.maxpacket; + + /* * We only add to our list of requests now and * start consuming the list once we get XferNotReady * IRQ.