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Commit 776ffc16 authored by Michael Grzeschik's avatar Michael Grzeschik Committed by Greg Kroah-Hartman
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usb: chipidea: udc: move ZLT flag change to ep_enable 



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: default avatarMichael Grzeschik <m.grzeschik@pengutronix.de>
Reviewed-by: default avatarFelipe Balbi <balbi@ti.com>
Signed-off-by: default avatarAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1cd12a9c

drivers/usb/chipidea/udc.c

+2 −1
Original line number Diff line number Diff line
@@ -463,7 +463,6 @@ 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 */
@@ -1008,6 +1007,8 @@ 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);