netdev - [PATCH] vlan: cleanup the usage of vlan_dev

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Message-ID: <51FC4D52.7070607@gmail.com>
Date:	Sat, 03 Aug 2013 08:22:42 +0800
From:	Wang Sheng-Hui <shhuiw@...il.com>
To:	Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: [PATCH] vlan: cleanup the usage of vlan_dev_priv(dev)

This patch cleanup 2 points for the usage of vlan_dev_priv(dev):
	* In vlan_dev.c/vlan_dev_hard_header, we should use the var *vlan directly
	  after grabing the pointer at the beginning with
	      *vlan = vlan_dev_priv(dev);
       when we need to access the fields of *vlan.
	* In vlan.c/register_vlan_device, add the var *vlan pointer
	      struct vlan_dev_priv *vlan;
	  to cleanup the code to access the fields of vlan_dev_priv(new_dev).

Signed-off-by: Wang Sheng-Hui <shhuiw@...il.com>
---
  net/8021q/vlan.c     |   12 +++++++-----
  net/8021q/vlan_dev.c |    6 +++---
  2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 2fb2d88..b9d3d7e 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -210,6 +210,7 @@ out_vid_del:
  static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
  {
  	struct net_device *new_dev;
+	struct vlan_dev_priv *vlan;
  	struct net *net = dev_net(real_dev);
  	struct vlan_net *vn = net_generic(net, vlan_net_id);
  	char name[IFNAMSIZ];
@@ -260,11 +261,12 @@ static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
  	new_dev->mtu = real_dev->mtu;
  	new_dev->priv_flags |= (real_dev->priv_flags & IFF_UNICAST_FLT);

-	vlan_dev_priv(new_dev)->vlan_proto = htons(ETH_P_8021Q);
-	vlan_dev_priv(new_dev)->vlan_id = vlan_id;
-	vlan_dev_priv(new_dev)->real_dev = real_dev;
-	vlan_dev_priv(new_dev)->dent = NULL;
-	vlan_dev_priv(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
+	vlan = vlan_dev_priv(new_dev);
+	vlan->vlan_proto = htons(ETH_P_8021Q);
+	vlan->vlan_id = vlan_id;
+	vlan->real_dev = real_dev;
+	vlan->dent = NULL;
+	vlan->flags = VLAN_FLAG_REORDER_HDR;

  	new_dev->rtnl_link_ops = &vlan_link_ops;
  	err = register_vlan_dev(new_dev);
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 1cd3d2a..9ab8a7e 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -107,10 +107,10 @@ static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
  	u16 vlan_tci = 0;
  	int rc;

-	if (!(vlan_dev_priv(dev)->flags & VLAN_FLAG_REORDER_HDR)) {
+	if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) {
  		vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);

-		vlan_tci = vlan_dev_priv(dev)->vlan_id;
+		vlan_tci = vlan->vlan_id;
  		vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
  		vhdr->h_vlan_TCI = htons(vlan_tci);

@@ -133,7 +133,7 @@ static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
  		saddr = dev->dev_addr;

  	/* Now make the underlying real hard header */
-	dev = vlan_dev_priv(dev)->real_dev;
+	dev = vlan->real_dev;
  	rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
  	if (rc > 0)
  		rc += vhdrlen;
-- 
1.7.10.4

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