[PATCH v2 2/3] wifi: rtw88: usb: send Zero length packets if necessary

[Sascha Hauer]

Zero length packets are necessary when sending URBs with size
multiple of bulkout_size, otherwise the hardware just stalls.

Fixes: a82dfd33d1237 ("wifi: rtw88: Add common USB chip support")
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
 drivers/net/wireless/realtek/rtw88/usb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/realtek/rtw88/usb.c b/drivers/net/wireless/realtek/rtw88/usb.c
index d9e995544e405..1a09c9288198a 100644
--- a/drivers/net/wireless/realtek/rtw88/usb.c
+++ b/drivers/net/wireless/realtek/rtw88/usb.c
@@ -271,6 +271,7 @@ static int rtw_usb_write_port(struct rtw_dev *rtwdev, u8 qsel, struct sk_buff *s
 		return -ENOMEM;
 
 	usb_fill_bulk_urb(urb, usbd, pipe, skb->data, skb->len, cb, context);
+	urb->transfer_flags |= URB_ZERO_PACKET;
 	ret = usb_submit_urb(urb, GFP_ATOMIC);
 
 	usb_free_urb(urb);
-- 
2.30.2