ipv6 netevent: Remove old_neigh from netevent_redirect.

The only user is cxgb3 driver.

old_neigh is used to check device change, but it must not happen
on redirect.  In this sense, we can remove old_neigh argument.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 13 insertions, 28 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c
index 91d02eb51b8b..4232767862b5 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c
@@ -64,9 +64,8 @@ static const unsigned int MAX_ATIDS = 64 * 1024;
 static const unsigned int ATID_BASE = 0x10000;
 
 static void cxgb_neigh_update(struct neighbour *neigh);
-static void cxgb_redirect(struct dst_entry *old, struct neighbour *old_neigh,
-                          struct dst_entry *new, struct neighbour *new_neigh,
-                          const void *daddr);
+static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new,
+                          struct neighbour *neigh, const void *daddr);
 
 static inline int offload_activated(struct t3cdev *tdev)
 {
@@ -970,10 +969,9 @@ static int nb_callback(struct notifier_block *self, unsigned long event,
         }
         case (NETEVENT_REDIRECT):{
                 struct netevent_redirect *nr = ctx;
-                cxgb_redirect(nr->old, nr->old_neigh,
-                              nr->new, nr->new_neigh,
+                cxgb_redirect(nr->old, nr->new, nr->neigh,
                               nr->daddr);
-                cxgb_neigh_update(nr->new_neigh);
+                cxgb_neigh_update(nr->neigh);
                 break;
         }
         default:
@@ -1109,11 +1107,11 @@ static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
         tdev->send(tdev, skb);
 }
 
-static void cxgb_redirect(struct dst_entry *old, struct neighbour *old_neigh,
-                          struct dst_entry *new, struct neighbour *new_neigh,
+static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new,
+                          struct neighbour *neigh,
                           const void *daddr)
 {
-        struct net_device *olddev, *newdev;
+        struct net_device *dev;
         struct tid_info *ti;
         struct t3cdev *tdev;
         u32 tid;
@@ -1121,26 +1119,15 @@ static void cxgb_redirect(struct dst_entry *old, struct neighbour *old_neigh,
         struct l2t_entry *e;
         struct t3c_tid_entry *te;
 
-        olddev = old_neigh->dev;
-        newdev = new_neigh->dev;
+        dev = neigh->dev;
 
-        if (!is_offloading(olddev))
-                return;
-        if (!is_offloading(newdev)) {
-                pr_warn("%s: Redirect to non-offload device ignored\n",
-                        __func__);
+        if (!is_offloading(dev))
                 return;
-        }
-        tdev = dev2t3cdev(olddev);
+        tdev = dev2t3cdev(dev);
         BUG_ON(!tdev);
-        if (tdev != dev2t3cdev(newdev)) {
-                pr_warn("%s: Redirect to different offload device ignored\n",
-                        __func__);
-                return;
-        }
 
         /* Add new L2T entry */
-        e = t3_l2t_get(tdev, new, newdev, daddr);
+        e = t3_l2t_get(tdev, new, dev, daddr);
         if (!e) {
                 pr_err("%s: couldn't allocate new l2t entry!\n", __func__);
                 return;
diff --git a/include/net/netevent.h b/include/net/netevent.h
index 3ce4988c9c08..fe630dde35c3 100644
--- a/include/net/netevent.h
+++ b/include/net/netevent.h
@@ -16,9 +16,8 @@ struct neighbour;
 
 struct netevent_redirect {
         struct dst_entry *old;
-        struct neighbour *old_neigh;
         struct dst_entry *new;
-        struct neighbour *new_neigh;
+        struct neighbour *neigh;
         const void *daddr;
 };
 
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 34f392f050c1..7c34c01b515b 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1803,10 +1803,9 @@ static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_bu
                 goto out;
 
         netevent.old = &rt->dst;
-        netevent.old_neigh = old_neigh;
         netevent.new = &nrt->dst;
-        netevent.new_neigh = neigh;
         netevent.daddr = &msg->dest;
+        netevent.neigh = neigh;
         call_netevent_notifiers(NETEVENT_REDIRECT, &netevent);
 
         if (rt->rt6i_flags & RTF_CACHE) {