[PATCH v3 01/10] usb: chipidea: udc: zero-length packet is only needed for TX

Fri, 07 Aug 2015 01:27:13 -0700 

The zero-length packet is the sendor tells the receiver that there
is no more data, so it is only needed at the TX side.

Signed-off-by: Peter Chen <peter.c...@freescale.com>
---
 drivers/usb/chipidea/udc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 2a47720..15f55da 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -445,7 +445,7 @@ static int _hardware_enqueue(struct ci_hw_ep *hwep, struct 
ci_hw_req *hwreq)
                rest -= count;
        }
 
-       if (hwreq->req.zero && hwreq->req.length
+       if (hwreq->req.zero && hwreq->req.length && hwep->dir == TX
            && (hwreq->req.length % hwep->ep.maxpacket == 0))
                add_td_to_list(hwep, hwreq, 0);
 
-- 
1.9.1

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