From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754151AbaDRJam (ORCPT ); Fri, 18 Apr 2014 05:30:42 -0400 Received: from ip4-83-240-18-248.cust.nbox.cz ([83.240.18.248]:46017 "EHLO ip4-83-240-18-248.cust.nbox.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752371AbaDRJWt (ORCPT ); Fri, 18 Apr 2014 05:22:49 -0400 From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Vlad Yasevich , Patrick McHardy , "David S. Miller" , Jiri Slaby Subject: [PATCH 3.12 59/72] vlan: Set hard_header_len according to available acceleration Date: Fri, 18 Apr 2014 11:22:32 +0200 Message-Id: <9ef39f43c0380ea34c0f2d8fc669a81cebd91d4e.1397812482.git.jslaby@suse.cz> X-Mailer: git-send-email 1.9.2 In-Reply-To: <3389f243c528afc7c7300c83b8f296290cd3656d.1397812482.git.jslaby@suse.cz> References: <3389f243c528afc7c7300c83b8f296290cd3656d.1397812482.git.jslaby@suse.cz> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vlad Yasevich 3.12-stable review patch. If anyone has any objections, please let me know. =============== [ Upstream commit fc0d48b8fb449ca007b2057328abf736cb516168 ] Currently, if the card supports CTAG acceleration we do not account for the vlan header even if we are configuring an 8021AD vlan. This may not be best since we'll do software tagging for 8021AD which will cause data copy on skb head expansion Configure the length based on available hw offload capabilities and vlan protocol. CC: Patrick McHardy Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller Signed-off-by: Jiri Slaby --- net/8021q/vlan.c | 4 +++- net/8021q/vlan_dev.c | 3 ++- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c index 61fc573f1142..856499fdb10f 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -307,9 +307,11 @@ static void vlan_sync_address(struct net_device *dev, static void vlan_transfer_features(struct net_device *dev, struct net_device *vlandev) { + struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); + vlandev->gso_max_size = dev->gso_max_size; - if (dev->features & NETIF_F_HW_VLAN_CTAG_TX) + if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) vlandev->hard_header_len = dev->hard_header_len; else vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index dc7d8da441dd..d1537dcd4df8 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -611,7 +611,8 @@ static int vlan_dev_init(struct net_device *dev) #endif dev->needed_headroom = real_dev->needed_headroom; - if (real_dev->features & NETIF_F_HW_VLAN_CTAG_TX) { + if (vlan_hw_offload_capable(real_dev->features, + vlan_dev_priv(dev)->vlan_proto)) { dev->header_ops = &vlan_passthru_header_ops; dev->hard_header_len = real_dev->hard_header_len; } else { -- 1.9.2