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[PATCH] ieee1394: reorder activities after bus reset (fixes device detection) 

Units were not detected if the local IRM performed a bus reset.  ("The root
node is not cycle master capable; selecting a new root node and resetting...",
often seen with iPods and other SBP-2 devices).  Rearrange the order of IRM
duties and node scanning.  TODO: Audit the ROM caching and parsing code for
underlying issues.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jody McIntyre <scjody@steamballoon.com>
Cc: Ben Collins <bcollins@debian.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jody McIntyre 2005-09-30 11:59:08 -07:00 committed by Linus Torvalds
parent 2bab359a50
commit 328699bf0f
1 changed files with 9 additions and 10 deletions
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19
drivers/ieee1394/nodemgr.c
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@ -1438,9 +1438,13 @@ static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
if (host->busmgr_id == 0xffff && host->node_count > 1)
{
u16 root_node = host->node_count - 1;
struct node_entry *ne = find_entry_by_nodeid(host, root_node | LOCAL_BUS);
if (ne && ne->busopt.cmc)
/* get cycle master capability flag from root node */
if (host->is_cycmst ||
(!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
(CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
&bc, sizeof(quadlet_t)) &&
be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
hpsb_send_phy_config(host, root_node, -1);
else {
HPSB_DEBUG("The root node is not cycle master capable; "
@ -1557,24 +1561,19 @@ static int nodemgr_host_thread(void *__hi)
}
}
if (!nodemgr_check_irm_capability(host, reset_cycles)) {
if (!nodemgr_check_irm_capability(host, reset_cycles) ||
!nodemgr_do_irm_duties(host, reset_cycles)) {
reset_cycles++;
up(&nodemgr_serialize);
continue;
}
reset_cycles = 0;
/* Scan our nodes to get the bus options and create node
* entries. This does not do the sysfs stuff, since that
* would trigger hotplug callbacks and such, which is a
* bad idea at this point. */
nodemgr_node_scan(hi, generation);
if (!nodemgr_do_irm_duties(host, reset_cycles)) {
reset_cycles++;
up(&nodemgr_serialize);
continue;
}
reset_cycles = 0;
/* This actually does the full probe, with sysfs
* registration. */