From owner-svn-src-all@freebsd.org  Tue Aug  8 11:49:38 2017
Return-Path: <owner-svn-src-all@freebsd.org>
Delivered-To: svn-src-all@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 3177EDD69EC;
 Tue,  8 Aug 2017 11:49:38 +0000 (UTC)
 (envelope-from hselasky@FreeBSD.org)
Received: from repo.freebsd.org (repo.freebsd.org
 [IPv6:2610:1c1:1:6068::e6a:0])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id F27DB82AA9;
 Tue,  8 Aug 2017 11:49:37 +0000 (UTC)
 (envelope-from hselasky@FreeBSD.org)
Received: from repo.freebsd.org ([127.0.1.37])
 by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id v78BnbZd056190;
 Tue, 8 Aug 2017 11:49:37 GMT (envelope-from hselasky@FreeBSD.org)
Received: (from hselasky@localhost)
 by repo.freebsd.org (8.15.2/8.15.2/Submit) id v78BnbGw056189;
 Tue, 8 Aug 2017 11:49:37 GMT (envelope-from hselasky@FreeBSD.org)
Message-Id: <201708081149.v78BnbGw056189@repo.freebsd.org>
X-Authentication-Warning: repo.freebsd.org: hselasky set sender to
 hselasky@FreeBSD.org using -f
From: Hans Petter Selasky <hselasky@FreeBSD.org>
Date: Tue, 8 Aug 2017 11:49:37 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: svn commit: r322251 - head/sys/dev/mlx5/mlx5_en
X-SVN-Group: head
X-SVN-Commit-Author: hselasky
X-SVN-Commit-Paths: head/sys/dev/mlx5/mlx5_en
X-SVN-Commit-Revision: 322251
X-SVN-Commit-Repository: base
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.23
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: <https://lists.freebsd.org/mailman/options/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: <https://lists.freebsd.org/mailman/listinfo/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 08 Aug 2017 11:49:38 -0000

Author: hselasky
Date: Tue Aug  8 11:49:36 2017
New Revision: 322251
URL: https://svnweb.freebsd.org/changeset/base/322251

Log:
  Make sure the received IP header gets 32-bit aligned for short packets
  in the mlx5en(4) driver.
  
  MFC after:		1 week
  Sponsored by:		Mellanox Technologies

Modified:
  head/sys/dev/mlx5/mlx5_en/mlx5_en_rx.c

Modified: head/sys/dev/mlx5/mlx5_en/mlx5_en_rx.c
==============================================================================
--- head/sys/dev/mlx5/mlx5_en/mlx5_en_rx.c	Tue Aug  8 11:36:57 2017	(r322250)
+++ head/sys/dev/mlx5/mlx5_en/mlx5_en_rx.c	Tue Aug  8 11:49:36 2017	(r322251)
@@ -355,9 +355,11 @@ mlx5e_poll_rx_cq(struct mlx5e_rq *rq, int budget)
 			rq->stats.wqe_err++;
 			goto wq_ll_pop;
 		}
-
-		if (MHLEN >= byte_cnt &&
+		if ((MHLEN - MLX5E_NET_IP_ALIGN) >= byte_cnt &&
 		    (mb = m_gethdr(M_NOWAIT, MT_DATA)) != NULL) {
+			/* get IP header aligned */
+			mb->m_data += MLX5E_NET_IP_ALIGN;
+
 			bcopy(rq->mbuf[wqe_counter].data, mtod(mb, caddr_t),
 			    byte_cnt);
 		} else {