diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c
index 46dc41a16faa23e9edbb213c55d39523c6fb0a41..ac82911ee609d1f686ccfc46fafebff310a4407c 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -107,12 +107,14 @@ static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev,
 static void hif_usb_tx_cb(struct urb *urb)
 {
 	struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
-	struct hif_device_usb *hif_dev = tx_buf->hif_dev;
+	struct hif_device_usb *hif_dev;
 	struct sk_buff *skb;
 
-	if (!hif_dev || !tx_buf)
+	if (!tx_buf || !tx_buf->hif_dev)
 		return;
 
+	hif_dev = tx_buf->hif_dev;
+
 	switch (urb->status) {
 	case 0:
 		break;