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ieee1394: regression in 2.6.25: updates should happen before probes 

Regression since commit 73cf60232e,
"ieee1394: use class iteration api":  The two loops for (1.) driver
updates and (2.) driver probes were replaced by a single loop with
bogus needs_probe checks.  Hence updates and probes were now intermixed,
and especially sbp2 updates (reconnects) held up longer than necessary.

While we fix it, change the needs_probe flag to bool type for clarity.

Tested by Damien Benoist.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2008-08-16 13:36:47 +02:00
parent 1fca254274
commit 6848408abf
2 changed files with 16 additions and 15 deletions
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29
drivers/ieee1394/nodemgr.c
View File

@ -844,7 +844,7 @@ static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr
ne->host = host;
ne->nodeid = nodeid;
ne->generation = generation;
ne->needs_probe = 1;
ne->needs_probe = true;
ne->guid = guid;
ne->guid_vendor_id = (guid >> 40) & 0xffffff;
@ -1144,7 +1144,7 @@ static void nodemgr_process_root_directory(struct host_info *hi, struct node_ent
struct csr1212_keyval *kv, *vendor_name_kv = NULL;
u8 last_key_id = 0;
ne->needs_probe = 0;
ne->needs_probe = false;
csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
switch (kv->key.id) {
@ -1295,7 +1295,7 @@ static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
nodemgr_update_bus_options(ne);
/* Mark the node as new, so it gets re-probed */
ne->needs_probe = 1;
ne->needs_probe = true;
} else {
/* old cache is valid, so update its generation */
struct nodemgr_csr_info *ci = ne->csr->private;
@ -1566,28 +1566,27 @@ static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int ge
struct probe_param {
struct host_info *hi;
int generation;
bool probe_now;
};
static int __nodemgr_node_probe(struct device *dev, void *data)
static int node_probe(struct device *dev, void *data)
{
struct probe_param *param = (struct probe_param *)data;
struct probe_param *p = data;
struct node_entry *ne;
ne = container_of(dev, struct node_entry, node_dev);
if (!ne->needs_probe)
nodemgr_probe_ne(param->hi, ne, param->generation);
if (ne->needs_probe)
nodemgr_probe_ne(param->hi, ne, param->generation);
if (ne->needs_probe == p->probe_now)
nodemgr_probe_ne(p->hi, ne, p->generation);
return 0;
}
static void nodemgr_node_probe(struct host_info *hi, int generation)
{
struct hpsb_host *host = hi->host;
struct probe_param param;
struct probe_param p;
param.hi = hi;
param.generation = generation;
p.hi = hi;
p.generation = generation;
/* Do some processing of the nodes we've probed. This pulls them
* into the sysfs layer if needed, and can result in processing of
* unit-directories, or just updating the node and it's
@ -1597,8 +1596,10 @@ static void nodemgr_node_probe(struct host_info *hi, int generation)
* while probes are time-consuming. (Well, those probes need some
* improvement...) */
class_for_each_device(&nodemgr_ne_class, NULL, &param,
__nodemgr_node_probe);
p.probe_now = false;
class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe);
p.probe_now = true;
class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe);
/* If we had a bus reset while we were scanning the bus, it is
* possible that we did not probe all nodes. In that case, we

2
drivers/ieee1394/nodemgr.h
View File

@ -97,7 +97,7 @@ struct node_entry {
struct hpsb_host *host; /* Host this node is attached to */
nodeid_t nodeid; /* NodeID */
struct bus_options busopt; /* Bus Options */
int needs_probe;
bool needs_probe;
unsigned int generation; /* Synced with hpsb generation */
/* The following is read from the config rom */