diff options
Diffstat (limited to 'drivers/net/ethernet/chelsio/cxgb3/l2t.c')
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb3/l2t.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb3/l2t.c b/drivers/net/ethernet/chelsio/cxgb3/l2t.c index f452c4003253..41540978a173 100644 --- a/drivers/net/ethernet/chelsio/cxgb3/l2t.c +++ b/drivers/net/ethernet/chelsio/cxgb3/l2t.c @@ -300,14 +300,21 @@ static inline void reuse_entry(struct l2t_entry *e, struct neighbour *neigh) struct l2t_entry *t3_l2t_get(struct t3cdev *cdev, struct neighbour *neigh, struct net_device *dev) { - struct l2t_entry *e; - struct l2t_data *d = L2DATA(cdev); + struct l2t_entry *e = NULL; + struct l2t_data *d; + int hash; u32 addr = *(u32 *) neigh->primary_key; int ifidx = neigh->dev->ifindex; - int hash = arp_hash(addr, ifidx, d); struct port_info *p = netdev_priv(dev); int smt_idx = p->port_id; + rcu_read_lock(); + d = L2DATA(cdev); + if (!d) + goto done_rcu; + + hash = arp_hash(addr, ifidx, d); + write_lock_bh(&d->lock); for (e = d->l2tab[hash].first; e; e = e->next) if (e->addr == addr && e->ifindex == ifidx && @@ -338,6 +345,8 @@ struct l2t_entry *t3_l2t_get(struct t3cdev *cdev, struct neighbour *neigh, } done: write_unlock_bh(&d->lock); +done_rcu: + rcu_read_unlock(); return e; } |