firewire: net: invalidate ARP entries of removed nodes
This makes it possible to resume communication with a node that dropped
off the bus for a brief period. Otherwise communication will only be
possible after ARP cache entry timeouts.
Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (rebased)
diff --git a/drivers/firewire/net.c b/drivers/firewire/net.c
index c2e194c..7ed08fd1 100644
--- a/drivers/firewire/net.c
+++ b/drivers/firewire/net.c
@@ -191,6 +191,7 @@
struct fwnet_device *dev;
u64 guid;
u64 fifo;
+ __be32 ip;
/* guarded by dev->lock */
struct list_head pd_list; /* received partial datagrams */
@@ -570,6 +571,8 @@
peer->speed = sspd;
if (peer->max_payload > max_payload)
peer->max_payload = max_payload;
+
+ peer->ip = arp1394->sip;
}
spin_unlock_irqrestore(&dev->lock, flags);
@@ -1470,6 +1473,7 @@
peer->dev = dev;
peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
peer->fifo = FWNET_NO_FIFO_ADDR;
+ peer->ip = 0;
INIT_LIST_HEAD(&peer->pd_list);
peer->pdg_size = 0;
peer->datagram_label = 0;
@@ -1589,10 +1593,13 @@
mutex_lock(&fwnet_device_mutex);
+ net = dev->netdev;
+ if (net && peer->ip)
+ arp_invalidate(net, peer->ip);
+
fwnet_remove_peer(peer, dev);
if (list_empty(&dev->peer_list)) {
- net = dev->netdev;
unregister_netdev(net);
if (dev->local_fifo != FWNET_NO_FIFO_ADDR)
