diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index 9a3f31a..086abb4 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -1169,8 +1169,10 @@
 /**
  * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes.
  * @entry: Pointer to &struct queue_entry
+ *
+ * Returns -ENOMEM if mapping fail, 0 otherwise.
  */
-void rt2x00queue_map_txskb(struct queue_entry *entry);
+int rt2x00queue_map_txskb(struct queue_entry *entry);
 
 /**
  * rt2x00queue_unmap_skb - Unmap a skb from DMA.