From owner-svn-src-all@FreeBSD.ORG  Thu Sep 10 18:53:34 2009
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id C5C4C106566C;
	Thu, 10 Sep 2009 18:53:34 +0000 (UTC) (envelope-from jfv@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id B52808FC08;
	Thu, 10 Sep 2009 18:53:34 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id n8AIrYnE028059;
	Thu, 10 Sep 2009 18:53:34 GMT (envelope-from jfv@svn.freebsd.org)
Received: (from jfv@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id n8AIrYpb028056;
	Thu, 10 Sep 2009 18:53:34 GMT (envelope-from jfv@svn.freebsd.org)
Message-Id: <200909101853.n8AIrYpb028056@svn.freebsd.org>
From: Jack F Vogel <jfv@FreeBSD.org>
Date: Thu, 10 Sep 2009 18:53:34 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r197073 - head/sys/dev/e1000
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 10 Sep 2009 18:53:34 -0000

Author: jfv
Date: Thu Sep 10 18:53:34 2009
New Revision: 197073
URL: http://svn.freebsd.org/changeset/base/197073

Log:
  Fix for pr 138516
  An mbuf is not requeued when a xmit fails.
  
  MFC: 3 days

Modified:
  head/sys/dev/e1000/if_em.c

Modified: head/sys/dev/e1000/if_em.c
==============================================================================
--- head/sys/dev/e1000/if_em.c	Thu Sep 10 18:33:08 2009	(r197072)
+++ head/sys/dev/e1000/if_em.c	Thu Sep 10 18:53:34 2009	(r197073)
@@ -1034,9 +1034,10 @@ em_mq_start_locked(struct ifnet *ifp, st
 		return (error);
 	} else if (drbr_empty(ifp, adapter->br) &&
 	    (adapter->num_tx_desc_avail > EM_TX_OP_THRESHOLD)) {
-		if (em_xmit(adapter, &m)) {
-			if (m && (error = drbr_enqueue(ifp, adapter->br, m)) != 0)
-				return (error);
+		if (error = em_xmit(adapter, &m)) {
+			if (m != NULL)
+				error = drbr_enqueue(ifp, adapter->br, m);
+			return (error);
 		} else {
 			/*
 			 * We've bypassed the buf ring so we need to update
@@ -1063,8 +1064,12 @@ process:
                 next = drbr_dequeue(ifp, adapter->br);
                 if (next == NULL)
                         break;
-                if (em_xmit(adapter, &next))
+                if (error = em_xmit(adapter, &next)) {
+			if (next != NULL)
+				error = drbr_enqueue(ifp, adapter->br, next);
                         break;
+		}
+		drbr_stats_update(ifp, next->m_pkthdr.len, next->m_flags);
                 ETHER_BPF_MTAP(ifp, next);
                 /* Set the watchdog */
                 adapter->watchdog_timer = EM_TX_TIMEOUT;
@@ -1073,7 +1078,7 @@ process:
         if (adapter->num_tx_desc_avail <= EM_TX_OP_THRESHOLD)
                 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 
-	return (0);
+	return (error);
 }
 
 /*