From: Woojung.Huh@microchip.com Date: Wed, 27 Jan 2016 22:57:54 +0000 (+0000) Subject: lan78xx: throttle TX path at slower than SuperSpeed USB X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4b2a4a965331a8ce7303b43039ce43651ef80fb0;p=linux.git lan78xx: throttle TX path at slower than SuperSpeed USB Throttle TX path only at slower than SuperSpeed USB. SuperSpeed USB has enough bandwidth to maintain GigE. Signed-off-by: Woojung Huh Signed-off-by: David S. Miller --- diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index 650e71604d861..1c299b8a162d7 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -2263,7 +2263,9 @@ netdev_tx_t lan78xx_start_xmit(struct sk_buff *skb, struct net_device *net) if (skb2) { skb_queue_tail(&dev->txq_pend, skb2); - if (skb_queue_len(&dev->txq_pend) > 10) + /* throttle TX patch at slower than SUPER SPEED USB */ + if ((dev->udev->speed < USB_SPEED_SUPER) && + (skb_queue_len(&dev->txq_pend) > 10)) netif_stop_queue(net); } else { netif_dbg(dev, tx_err, dev->net,