diff mbox

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

Message ID 1438931747-25209-2-git-send-email-peter.chen@freescale.com (mailing list archive)
State New, archived
Headers show

Commit Message

Peter Chen Aug. 7, 2015, 7:15 a.m. UTC 
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.chen@freescale.com>
---
 drivers/usb/chipidea/udc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

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);