From: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx> 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. Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx> Reviewed-by: Felipe Balbi <balbi@xxxxxx> Signed-off-by: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx> --- 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 20ae435..d5f0322 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -476,7 +476,6 @@ static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq) mEp->qh.ptr->td.next = cpu_to_le32(mReq->dma); /* TERMINATE = 0 */ mEp->qh.ptr->td.token &= cpu_to_le32(~(TD_STATUS_HALTED|TD_STATUS_ACTIVE)); - mEp->qh.ptr->cap |= cpu_to_le32(QH_ZLT); wmb(); /* synchronize before ep prime */ @@ -1034,6 +1033,8 @@ static int ep_enable(struct usb_ep *ep, if (mEp->type == USB_ENDPOINT_XFER_CONTROL) cap |= QH_IOS; + if (mEp->num) + cap |= QH_ZLT; cap |= (mEp->ep.maxpacket << __ffs(QH_MAX_PKT)) & QH_MAX_PKT; mEp->qh.ptr->cap = cpu_to_le32(cap); -- 1.7.10.4 -- 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
