ath9k_htc: fix memory leak in ath9k_hif_usb_alloc_urbs

Failure cases within ath9k_hif_usb_alloc_urbs are failed
to release allocated memory.

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/hif_usb.c

@@ -730,13 +730,17 @@ static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
 
 	/* RX */
 	if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
-		goto err;
+		goto err_rx;
 
 	/* Register Read */
 	if (ath9k_hif_usb_alloc_reg_in_urb(hif_dev) < 0)
-		goto err;
+		goto err_reg;
 
 	return 0;
+err_reg:
+	ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
+err_rx:
+	ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
 err:
 	return -ENOMEM;
 }