From c9755e14a01987ada4063e8b4c50c2b6738d879e Mon Sep 17 00:00:00 2001
From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Mon, 24 Mar 2008 20:54:28 +0100
Subject: 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>
---
drivers/firewire/fw-sbp2.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
(limited to 'drivers/firewire/fw-sbp2.c')
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index e99a33f..2a999373 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -153,6 +153,7 @@ struct sbp2_target {
struct list_head lu_list;
u64 management_agent_address;
+ u64 guid;
int directory_id;
int node_id;
int address_high;
@@ -1114,6 +1115,7 @@ static int sbp2_probe(struct device *dev)
kref_init(&tgt->kref);
INIT_LIST_HEAD(&tgt->lu_list);
tgt->bus_id = unit->device.bus_id;
+ tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
if (fw_device_enable_phys_dma(device) < 0)
goto fail_shost_put;
@@ -1571,16 +1573,14 @@ sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr,
{
struct scsi_device *sdev = to_scsi_device(dev);
struct sbp2_logical_unit *lu;
- struct fw_device *device;
if (!sdev)
return 0;
lu = sdev->hostdata;
- device = fw_device(lu->tgt->unit->device.parent);
- return sprintf(buf, "%08x%08x:%06x:%04x\n",
- device->config_rom[3], device->config_rom[4],
+ return sprintf(buf, "%016llx:%06x:%04x\n",
+ (unsigned long long)lu->tgt->guid,
lu->tgt->directory_id, lu->lun);
}
--
cgit v1.1