diff options
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/imx_udc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c index 239bf8ed9f4..c52a681f376 100644 --- a/drivers/usb/gadget/imx_udc.c +++ b/drivers/usb/gadget/imx_udc.c @@ -415,6 +415,13 @@ static int write_packet(struct imx_ep_struct *imx_ep, struct imx_request *req) u8 *buf; int length, count, temp; + if (unlikely(__raw_readl(imx_ep->imx_usb->base + + USB_EP_STAT(EP_NO(imx_ep))) & EPSTAT_ZLPS)) { + D_TRX(imx_ep->imx_usb->dev, "<%s> zlp still queued in EP %s\n", + __func__, imx_ep->ep.name); + return -1; + } + buf = req->req.buf + req->req.actual; prefetch(buf); |