Its not needed 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. 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 b7f0a7b..a86d9a6 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -473,7 +473,6 @@ static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq) /* QH configuration */ writel(mReq->dma, &mEp->qh.ptr->td.next); /* TERMINATE = 0 */ writel(readl(&mEp->qh.ptr->td.token) & ~(TD_STATUS_HALTED|TD_STATUS_ACTIVE), &mEp->qh.ptr->td.token); - writel(readl(&mEp->qh.ptr->cap) | QH_ZLT, &mEp->qh.ptr->cap); wmb(); /* synchronize before ep prime */ @@ -1039,6 +1038,8 @@ static int ep_enable(struct usb_ep *ep, mEp->qh.ptr->cap &= ~QH_MULT; else writel(readl(&mEp->qh.ptr->cap) & ~QH_ZLT, &mEp->qh.ptr->cap); + if (mEp->num) + writel(readl(&mEp->qh.ptr->cap) | QH_ZLT, &mEp->qh.ptr->cap); writel(readl(&mEp->qh.ptr->cap) | ((mEp->ep.maxpacket << __ffs(QH_MAX_PKT)) & QH_MAX_PKT), &mEp->qh.ptr->cap); writel(readl(&mEp->qh.ptr->td.next) | TD_TERMINATE, &mEp->qh.ptr->td.next); /* needed? */ -- 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
