diff --git a/[refs] b/[refs]
index 305bd8d5b1c6..a550f3de5de2 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d23ff701643a4a725e2c7a8ba2d567d39daa29ea
+refs/heads/master: f6fe569fe056388166575af1cfaed0bcbc688305
diff --git a/trunk/drivers/net/usb/usbnet.c b/trunk/drivers/net/usb/usbnet.c
index 5234d20ef44d..8531c1caac28 100644
--- a/trunk/drivers/net/usb/usbnet.c
+++ b/trunk/drivers/net/usb/usbnet.c
@@ -1092,7 +1092,8 @@ netdev_tx_t usbnet_start_xmit (struct sk_buff *skb,
 	unsigned long		flags;
 	int retval;
 
-	skb_tx_timestamp(skb);
+	if (skb)
+		skb_tx_timestamp(skb);
 
 	// some devices want funky USB-level framing, for
 	// win32 driver (usually) and/or hardware quirks