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path: root/drivers/ieee1394/nodemgr.c
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Diffstat (limited to 'drivers/ieee1394/nodemgr.c')
-rw-r--r--drivers/ieee1394/nodemgr.c63
1 files changed, 33 insertions, 30 deletions
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
index 994a21e5a0aa..16240a789650 100644
--- a/drivers/ieee1394/nodemgr.c
+++ b/drivers/ieee1394/nodemgr.c
@@ -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;
@@ -1566,57 +1566,60 @@ 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;
+ if (p->generation != get_hpsb_generation(p->hi->host))
+ return -EAGAIN;
+
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;
- /* Do some processing of the nodes we've probed. This pulls them
+ 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
* unit-directories.
*
* Run updates before probes. Usually, updates are time-critical
- * while probes are time-consuming. (Well, those probes need some
- * improvement...) */
-
- class_for_each_device(&nodemgr_ne_class, NULL, &param,
- __nodemgr_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
- * skip the clean up for now, since we could remove nodes that
- * were still on the bus. Another bus scan is pending which will
- * do the clean up eventually.
+ * while probes are time-consuming.
*
+ * Meanwhile, another bus reset may have happened. In this case we
+ * skip everything here and let the next bus scan handle it.
+ * Otherwise we may prematurely remove nodes which are still there.
+ */
+ p.probe_now = false;
+ if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
+ return;
+
+ p.probe_now = true;
+ if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
+ return;
+ /*
* Now let's tell the bus to rescan our devices. This may seem
* like overhead, but the driver-model core will only scan a
* device for a driver when either the device is added, or when a
* new driver is added. A bus reset is a good reason to rescan
* devices that were there before. For example, an sbp2 device
* may become available for login, if the host that held it was
- * just removed. */
-
- if (generation == get_hpsb_generation(host))
- if (bus_rescan_devices(&ieee1394_bus_type))
- HPSB_DEBUG("bus_rescan_devices had an error");
+ * just removed.
+ */
+ if (bus_rescan_devices(&ieee1394_bus_type) != 0)
+ HPSB_DEBUG("bus_rescan_devices had an error");
}
static int nodemgr_send_resume_packet(struct hpsb_host *host)

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