firewire: reread config ROM when device reset the bus

When a device changes its configuration ROM, it announces this with a
bus reset.  firewire-core has to check which node initiated a bus reset
and whether any unit directories went away or were added on this node.

Tested with an IOI FWB-IDE01AB which has its link-on bit set if bus
power is available but does not respond to ROM read requests if self
power is off.  This implements
  - recognition of the units if self power is switched on after fw-core
    gave up the initial attempt to read the config ROM,
  - shutdown of the units when self power is switched off.

Also tested with a second PC running Linux/ieee1394.  When the eth1394
driver is inserted and removed on that node, fw-core now notices the
addition and removal of the IPv4 unit on the ieee1394 node.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 6 insertions, 5 deletions

diff --git a/drivers/firewire/fw-topology.h b/drivers/firewire/fw-topology.h
index cedc1ec906e9..addb9f8ea776 100644
--- a/drivers/firewire/fw-topology.h
+++ b/drivers/firewire/fw-topology.h
@@ -20,11 +20,12 @@
 #define __fw_topology_h
 
 enum {
-        FW_NODE_CREATED =   0x00,
-        FW_NODE_UPDATED =   0x01,
-        FW_NODE_DESTROYED = 0x02,
-        FW_NODE_LINK_ON =   0x03,
-        FW_NODE_LINK_OFF =  0x04,
+        FW_NODE_CREATED,
+        FW_NODE_UPDATED,
+        FW_NODE_DESTROYED,
+        FW_NODE_LINK_ON,
+        FW_NODE_LINK_OFF,
+        FW_NODE_INITIATED_RESET,
 };
 
 struct fw_node {