Its not necessary and also not specified in the datasheet to change the ZLT flag before every ep_prime. This patch moves this to the ep_enable and applies it only for non configuration endpoints. Cc: stable <stable@xxxxxxxxxxxxxxx> Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx> --- drivers/usb/chipidea/udc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index 4bbbe62..a8528ad 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -489,7 +489,6 @@ static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq) /* QH configuration */ mEp->qh.ptr->td.next = mReq->dma; /* TERMINATE = 0 */ mEp->qh.ptr->td.token &= ~(TD_STATUS_HALTED|TD_STATUS_ACTIVE); - mEp->qh.ptr->cap |= QH_ZLT; wmb(); /* synchronize before ep prime */ @@ -1052,6 +1051,8 @@ static int ep_enable(struct usb_ep *ep, mEp->qh.ptr->cap &= ~QH_MULT; else mEp->qh.ptr->cap &= ~QH_ZLT; + if (mEp->num) + mEp->qh.ptr->cap |= QH_ZLT; mEp->qh.ptr->cap |= (mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT; -- 1.8.2.rc2 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
