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 <sta...@vger.kernel.org>
Signed-off-by: Michael Grzeschik <m.grzesc...@pengutronix.de>
Reviewed-by: Felipe Balbi <ba...@ti.com>
---
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 majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
