igb: Fix comment
authorSepherosa Ziehau <sephe@dragonflybsd.org>
Fri, 28 Dec 2012 06:40:30 +0000 (14:40 +0800)
committerSepherosa Ziehau <sephe@dragonflybsd.org>
Fri, 28 Dec 2012 06:40:30 +0000 (14:40 +0800)
sys/dev/netif/igb/if_igb.c

index 9086d5b..47399f4 100644 (file)
@@ -3292,8 +3292,7 @@ igb_encap(struct igb_tx_ring *txr, struct mbuf **m_headp,
        txd->read.cmd_type_len |= htole32(E1000_ADVTXD_DCMD_EOP | cmd_rs);
 
        /*
-        * Advance the Transmit Descriptor Tail (TDT), this tells the E1000
-        * that this frame is available to transmit.
+        * Defer TDT updating, until enough descrptors are setup
         */
        *idx = i;
        ++txr->tx_packets;