Throttle TX path when slower than SUPER SPEED USB to avoid
choking CPU.
Signed-off-by: Woojung Huh <woojung....@microchip.com>
---
drivers/net/usb/lan78xx.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 9b95333..e0cbc5a 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2264,7 +2264,9 @@ 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,
--
2.1.4
