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From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Fri, 20 Nov 2009 20:25:22 +0000 (UTC)
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Subject: svn commit: r199610 - head/sys/dev/et
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Author: yongari
Date: Fri Nov 20 20:25:21 2009
New Revision: 199610
URL: http://svn.freebsd.org/changeset/base/199610

Log:
  Because we know received bytes including CRC there is no reason to
  call m_adj(9). The controller also seems to have a capability to
  strip CRC bytes but I failed to activate this feature except for
  loopback traffic.

Modified:
  head/sys/dev/et/if_et.c

Modified: head/sys/dev/et/if_et.c
==============================================================================
--- head/sys/dev/et/if_et.c	Fri Nov 20 20:18:53 2009	(r199609)
+++ head/sys/dev/et/if_et.c	Fri Nov 20 20:25:21 2009	(r199610)
@@ -1982,11 +1982,9 @@ et_rxeof(struct et_softc *sc)
 				m = NULL;
 				ifp->if_ierrors++;
 			} else {
-				m->m_pkthdr.len = m->m_len = buflen;
+				m->m_pkthdr.len = m->m_len =
+				    buflen - ETHER_CRC_LEN;
 				m->m_pkthdr.rcvif = ifp;
-
-				m_adj(m, -ETHER_CRC_LEN);
-
 				ifp->if_ipackets++;
 				ET_UNLOCK(sc);
 				ifp->if_input(ifp, m);