e1000: enhance frame fragment detection
[linux-2.6.git] / drivers / net / e1000 / e1000_main.c
index b3f67b41627f88906b6cd3d7dbbdd1dc8d9ea652..a53a2017c53773891cdc58596c79533b6f71d44b 100644 (file)
@@ -3850,13 +3850,22 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 
                length = le16_to_cpu(rx_desc->length);
                /* !EOP means multiple descriptors were used to store a single
-                * packet, also make sure the frame isn't just CRC only */
-               if (unlikely(!(status & E1000_RXD_STAT_EOP) || (length <= 4))) {
+                * packet, if thats the case we need to toss it.  In fact, we
+                * to toss every packet with the EOP bit clear and the next
+                * frame that _does_ have the EOP bit set, as it is by
+                * definition only a frame fragment
+                */
+               if (unlikely(!(status & E1000_RXD_STAT_EOP)))
+                       adapter->discarding = true;
+
+               if (adapter->discarding) {
                        /* All receives must fit into a single buffer */
                        E1000_DBG("%s: Receive packet consumed multiple"
                                  " buffers\n", netdev->name);
                        /* recycle */
                        buffer_info->skb = skb;
+                       if (status & E1000_RXD_STAT_EOP)
+                               adapter->discarding = false;
                        goto next_desc;
                }