1 files changed, 5 insertions, 3 deletions

diff --git a/sys/xen/interface/io/netif.h b/sys/xen/interface/io/netif.h
index fbb5c2723118..261b7d9380af 100644
--- a/sys/xen/interface/io/netif.h
+++ b/sys/xen/interface/io/netif.h
@@ -42,7 +42,7 @@
  * This is the 'wire' format for packets:
  *  Request 1: netif_tx_request -- NETTXF_* (any flags)
  * [Request 2: netif_tx_extra]  (only if request 1 has NETTXF_extra_info)
- * [Request 3: netif_tx_extra]  (only if request 2 has XEN_NETIF_EXTRA_MORE)
+ * [Request 3: netif_tx_extra] (only if request 2 has XEN_NETIF_EXTRA_FLAG_MORE)
  *  Request 4: netif_tx_request -- NETTXF_more_data
  *  Request 5: netif_tx_request -- NETTXF_more_data
  *  ...
@@ -70,7 +70,9 @@ struct netif_tx_request {
     uint16_t offset;       /* Offset within buffer page */
     uint16_t flags;        /* NETTXF_* */
     uint16_t id;           /* Echoed in response message. */
-    uint16_t size;         /* Packet size in bytes.       */
+    uint16_t size;         /* For the first request in a packet, the packet 
+			      size in bytes.  For subsequent requests, the 
+			      size of that request's associated data in bytes*/
 };
 typedef struct netif_tx_request netif_tx_request_t;
 
@@ -175,7 +177,7 @@ struct netif_rx_response {
     uint16_t id;
     uint16_t offset;       /* Offset in page of start of received packet  */
     uint16_t flags;        /* NETRXF_* */
-    int16_t  status;       /* -ve: BLKIF_RSP_* ; +ve: Rx'ed pkt size. */
+    int16_t  status;       /* -ve: NETIF_RSP_* ; +ve: Rx'ed response size. */
 };
 typedef struct netif_rx_response netif_rx_response_t;