diff options
| -rw-r--r-- | drivers/usb/chipidea/udc.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index ff45104..5244542 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -1151,10 +1151,13 @@ static int ep_enable(struct usb_ep *ep, /* only internal SW should enable ctrl endpts */ - hwep->ep.desc = desc; - - if (!list_empty(&hwep->qh.queue)) + if (!list_empty(&hwep->qh.queue)) { dev_warn(hwep->ci->dev, "enabling a non-empty endpoint!\n"); + spin_unlock_irqrestore(hwep->lock, flags); + return -EBUSY; + } + + hwep->ep.desc = desc; hwep->dir = usb_endpoint_dir_in(desc) ? TX : RX; hwep->num = usb_endpoint_num(desc); |