diff options
Diffstat (limited to 'drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c')
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c index 90ff1318cc05..65e4b280619a 100644 --- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c +++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c @@ -969,7 +969,7 @@ static int nb_callback(struct notifier_block *self, unsigned long event, case (NETEVENT_REDIRECT):{ struct netevent_redirect *nr = ctx; cxgb_redirect(nr->old, nr->new); - cxgb_neigh_update(dst_get_neighbour(nr->new)); + cxgb_neigh_update(dst_get_neighbour_noref(nr->new)); break; } default: @@ -1072,8 +1072,11 @@ static int is_offloading(struct net_device *dev) static void cxgb_neigh_update(struct neighbour *neigh) { - struct net_device *dev = neigh->dev; + struct net_device *dev; + if (!neigh) + return; + dev = neigh->dev; if (dev && (is_offloading(dev))) { struct t3cdev *tdev = dev2t3cdev(dev); @@ -1107,6 +1110,7 @@ static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e) static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new) { struct net_device *olddev, *newdev; + struct neighbour *n; struct tid_info *ti; struct t3cdev *tdev; u32 tid; @@ -1114,8 +1118,16 @@ static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new) struct l2t_entry *e; struct t3c_tid_entry *te; - olddev = dst_get_neighbour(old)->dev; - newdev = dst_get_neighbour(new)->dev; + n = dst_get_neighbour_noref(old); + if (!n) + return; + olddev = n->dev; + + n = dst_get_neighbour_noref(new); + if (!n) + return; + newdev = n->dev; + if (!is_offloading(olddev)) return; if (!is_offloading(newdev)) { @@ -1132,7 +1144,7 @@ static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new) } /* Add new L2T entry */ - e = t3_l2t_get(tdev, dst_get_neighbour(new), newdev); + e = t3_l2t_get(tdev, new, newdev); if (!e) { printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n", __func__); @@ -1301,7 +1313,7 @@ int cxgb3_offload_activate(struct adapter *adapter) out_free_l2t: t3_free_l2t(L2DATA(dev)); - rcu_assign_pointer(dev->l2opt, NULL); + RCU_INIT_POINTER(dev->l2opt, NULL); out_free: kfree(t); return err; @@ -1329,7 +1341,7 @@ void cxgb3_offload_deactivate(struct adapter *adapter) rcu_read_lock(); d = L2DATA(tdev); rcu_read_unlock(); - rcu_assign_pointer(tdev->l2opt, NULL); + RCU_INIT_POINTER(tdev->l2opt, NULL); call_rcu(&d->rcu_head, clean_l2_data); if (t->nofail_skb) kfree_skb(t->nofail_skb); |