Hi Roger,
Request size can be greater than ep.packet and still end in a short packet. We need to tackle this case as end of transfer (if short_not_ok is not set) as indicated in USB 2.0 Specification [1], else we get stuck up on certain protocols like fastboot.
[1] - USB2.0 Specification, Section 5.3.2 Pipes
Reported-by: Steve Rae steve.rae@broadcom.com Signed-off-by: Roger Quadros rogerq@ti.com Tested-by: Steve Rae steve.rae@broadcom.com
drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c b/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c index bce9c30..9aa0f33 100644 --- a/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c +++ b/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c @@ -229,7 +229,7 @@ static void complete_rx(struct dwc2_udc *dev, u8 ep_num) ROUND(xfer_size, CONFIG_SYS_CACHELINE_SIZE));
req->req.actual += min(xfer_size, req->req.length - req->req.actual);
- is_short = (xfer_size < ep->ep.maxpacket);
is_short = !!(xfer_size % ep->ep.maxpacket);
debug_cond(DEBUG_OUT_EP != 0, "%s: RX DMA done : ep = %d, rx bytes = %d/%d, "
Tested-by: Lukasz Majewski l.majewski@samsung.com
Test HW: Odroid U3 (Exynos 4412)
Test: ./test/py DFU & UMS