3 files changed, 19 insertions, 7 deletions

diff --git a/drivers/firewire/Kconfig b/drivers/firewire/Kconfig
index 68f942cb30f..0c56989cd90 100644
--- a/drivers/firewire/Kconfig
+++ b/drivers/firewire/Kconfig
@@ -49,15 +49,13 @@ config FIREWIRE_SBP2
           configuration section.
 
 config FIREWIRE_NET
-        tristate "IP networking over 1394 (EXPERIMENTAL)"
-        depends on FIREWIRE && INET && EXPERIMENTAL
+        tristate "IP networking over 1394"
+        depends on FIREWIRE && INET
         help
           This enables IPv4 over IEEE 1394, providing IP connectivity with
           other implementations of RFC 2734 as found on several operating
           systems.  Multicast support is currently limited.
 
-          NOTE, this driver is not stable yet!
-
           To compile this driver as a module, say M here:  The module will be
           called firewire-net.
 
diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c
index be0492398ef..24ff35511e2 100644
--- a/drivers/firewire/core-card.c
+++ b/drivers/firewire/core-card.c
@@ -75,6 +75,8 @@ static size_t config_rom_length = 1 + 4 + 1 + 1;
 #define BIB_IRMC                ((1) << 31)
 #define NODE_CAPABILITIES       0x0c0083c0 /* per IEEE 1394 clause 8.3.2.6.5.2 */
 
+#define CANON_OUI               0x000085
+
 static void generate_config_rom(struct fw_card *card, __be32 *config_rom)
 {
         struct fw_descriptor *desc;
@@ -284,6 +286,7 @@ static void bm_work(struct work_struct *work)
         bool root_device_is_running;
         bool root_device_is_cmc;
         bool irm_is_1394_1995_only;
+        bool keep_this_irm;
 
         spin_lock_irq(&card->lock);
 
@@ -305,6 +308,10 @@ static void bm_work(struct work_struct *work)
         irm_is_1394_1995_only = irm_device && irm_device->config_rom &&
                         (irm_device->config_rom[2] & 0x000000f0) == 0;
 
+        /* Canon MV5i works unreliably if it is not root node. */
+        keep_this_irm = irm_device && irm_device->config_rom &&
+                        irm_device->config_rom[3] >> 8 == CANON_OUI;
+
         root_id  = root_node->node_id;
         irm_id   = card->irm_node->node_id;
         local_id = card->local_node->node_id;
@@ -333,7 +340,7 @@ static void bm_work(struct work_struct *work)
                         goto pick_me;
                 }
 
-                if (irm_is_1394_1995_only) {
+                if (irm_is_1394_1995_only && !keep_this_irm) {
                         new_root_id = local_id;
                         fw_notify("%s, making local node (%02x) root.\n",
                                   "IRM is not 1394a compliant", new_root_id);
@@ -382,7 +389,7 @@ static void bm_work(struct work_struct *work)
 
                 spin_lock_irq(&card->lock);
 
-                if (rcode != RCODE_COMPLETE) {
+                if (rcode != RCODE_COMPLETE && !keep_this_irm) {
                         /*
                          * The lock request failed, maybe the IRM
                          * isn't really IRM capable after all. Let's
diff --git a/drivers/firewire/net.c b/drivers/firewire/net.c
index c2e194c5866..7ed08fd1214 100644
--- a/drivers/firewire/net.c
+++ b/drivers/firewire/net.c
@@ -191,6 +191,7 @@ struct fwnet_peer {
         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 @@ static int fwnet_finish_incoming_packet(struct net_device *net,
                                 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 @@ static int fwnet_add_peer(struct fwnet_device *dev,
         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 @@ static int fwnet_remove(struct device *_dev)
 
         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)