diff options
Diffstat (limited to 'drivers/ieee1394/nodemgr.c')
| -rw-r--r-- | drivers/ieee1394/nodemgr.c | 63 |
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, ¶m, - __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) |