[PATCH resend 3/4] nfc: Fix RC-S380* needs zero-length packet

[OGAWA Hirofumi]

If sent packet size is wMaxPacketSize boundary, this device doesn't
answer. To fix this, we have to send zero-length packet in usb spec.

Signed-off-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
---

 drivers/nfc/port100.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN drivers/nfc/port100.c~nfc-need-zero-packet drivers/nfc/port100.c
--- linux-ibmpc/drivers/nfc/port100.c~nfc-need-zero-packet	2016-12-31 18:27:14.814753508 +0900
+++ linux-ibmpc-hirofumi/drivers/nfc/port100.c	2016-12-31 18:32:12.928334607 +0900
@@ -1540,6 +1540,7 @@ static int port100_probe(struct usb_inte
 	usb_fill_bulk_urb(dev->out_urb, dev->udev,
 			  usb_sndbulkpipe(dev->udev, out_endpoint),
 			  NULL, 0, port100_send_complete, dev);
+	dev->out_urb->transfer_flags = URB_ZERO_PACKET;
 
 	dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
 			    PORT100_COMM_RF_HEAD_MAX_LEN;
_

-- 
OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>