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Diffstat (limited to 'net')
-rw-r--r--net/bridge/br_if.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index b1b3b0fbf41c..4a9f52732655 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -377,12 +377,16 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
377 struct net_bridge_port *p; 377 struct net_bridge_port *p;
378 int err = 0; 378 int err = 0;
379 379
380 if (dev->flags & IFF_LOOPBACK || dev->type != ARPHRD_ETHER) 380 /* Don't allow bridging non-ethernet like devices */
381 if ((dev->flags & IFF_LOOPBACK) ||
382 dev->type != ARPHRD_ETHER || dev->addr_len != ETH_ALEN)
381 return -EINVAL; 383 return -EINVAL;
382 384
385 /* No bridging of bridges */
383 if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit) 386 if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit)
384 return -ELOOP; 387 return -ELOOP;
385 388
389 /* Device is already being bridged */
386 if (dev->br_port != NULL) 390 if (dev->br_port != NULL)
387 return -EBUSY; 391 return -EBUSY;
388 392