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Commit c1c9c7cd authored by Stefan Richter's avatar Stefan Richter
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ieee1394: handle sysfs errors 

Handle driver core errors with as much care as appropriate.
Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent 1ed891c6
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Showing with 118 additions and 49 deletions
drivers/ieee1394/hosts.c
View file @ c1c9c7cd
......@@ -131,10 +131,8 @@ struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
return NULL;
h->csr.rom = csr1212_create_csr(&csr_bus_ops, CSR_BUS_INFO_SIZE, h);
if (!h->csr.rom) {
kfree(h);
return NULL;
}
if (!h->csr.rom)
goto fail;
h->hostdata = h + 1;
h->driver = drv;
......@@ -173,11 +171,19 @@ struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
h->class_dev.class = &hpsb_host_class;
snprintf(h->class_dev.class_id, BUS_ID_SIZE, "fw-host%d", h->id);
device_register(&h->device);
class_device_register(&h->class_dev);
if (device_register(&h->device))
goto fail;
if (class_device_register(&h->class_dev)) {
device_unregister(&h->device);
goto fail;
}
get_device(&h->device);
return h;
fail:
kfree(h);
return NULL;
}
int hpsb_add_host(struct hpsb_host *host)
......
drivers/ieee1394/nodemgr.c
View file @ c1c9c7cd
......@@ -413,11 +413,14 @@ static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
size_t count)
{
int error = 0;
if (simple_strtoul(buf, NULL, 10) == 1)
bus_rescan_devices(&ieee1394_bus_type);
return count;
error = bus_rescan_devices(&ieee1394_bus_type);
return error ? error : count;
}
static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
{
......@@ -583,7 +586,11 @@ static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
int i;
for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
driver_create_file(drv, fw_drv_attrs[i]);
if (driver_create_file(drv, fw_drv_attrs[i]))
goto fail;
return;
fail:
HPSB_ERR("Failed to add sysfs attribute for driver %s", driver->name);
}
......@@ -603,7 +610,12 @@ static void nodemgr_create_ne_dev_files(struct node_entry *ne)
int i;
for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
device_create_file(dev, fw_ne_attrs[i]);
if (device_create_file(dev, fw_ne_attrs[i]))
goto fail;
return;
fail:
HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
(unsigned long long)ne->guid);
}
......@@ -613,11 +625,16 @@ static void nodemgr_create_host_dev_files(struct hpsb_host *host)
int i;
for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
device_create_file(dev, fw_host_attrs[i]);
if (device_create_file(dev, fw_host_attrs[i]))
goto fail;
return;
fail:
HPSB_ERR("Failed to add sysfs attribute for host %d", host->id);
}
static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid);
static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
nodeid_t nodeid);
static void nodemgr_update_host_dev_links(struct hpsb_host *host)
{
......@@ -628,12 +645,18 @@ static void nodemgr_update_host_dev_links(struct hpsb_host *host)
sysfs_remove_link(&dev->kobj, "busmgr_id");
sysfs_remove_link(&dev->kobj, "host_id");
if ((ne = find_entry_by_nodeid(host, host->irm_id)))
sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id");
if ((ne = find_entry_by_nodeid(host, host->busmgr_id)))
sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id");
if ((ne = find_entry_by_nodeid(host, host->node_id)))
sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id");
if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
goto fail;
if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
goto fail;
if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
goto fail;
return;
fail:
HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
}
static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
......@@ -642,25 +665,32 @@ static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
int i;
for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
device_create_file(dev, fw_ud_attrs[i]);
if (device_create_file(dev, fw_ud_attrs[i]))
goto fail;
if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
device_create_file(dev, &dev_attr_ud_specifier_id);
if (device_create_file(dev, &dev_attr_ud_specifier_id))
goto fail;
if (ud->flags & UNIT_DIRECTORY_VERSION)
device_create_file(dev, &dev_attr_ud_version);
if (device_create_file(dev, &dev_attr_ud_version))
goto fail;
if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
device_create_file(dev, &dev_attr_ud_vendor_id);
if (ud->vendor_name_kv)
device_create_file(dev, &dev_attr_ud_vendor_name_kv);
if (device_create_file(dev, &dev_attr_ud_vendor_id))
goto fail;
if (ud->vendor_name_kv &&
device_create_file(dev, &dev_attr_ud_vendor_name_kv))
goto fail;
}
if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
device_create_file(dev, &dev_attr_ud_model_id);
if (ud->model_name_kv)
device_create_file(dev, &dev_attr_ud_model_name_kv);
if (device_create_file(dev, &dev_attr_ud_model_id))
goto fail;
if (ud->model_name_kv &&
device_create_file(dev, &dev_attr_ud_model_name_kv))
goto fail;
}
return;
fail:
HPSB_ERR("Failed to add sysfs attributes for unit %s",
ud->device.bus_id);
}
......@@ -748,7 +778,7 @@ static int __nodemgr_remove_host_dev(struct device *dev, void *data)
static void nodemgr_remove_host_dev(struct device *dev)
{
device_for_each_child(dev, NULL, __nodemgr_remove_host_dev);
WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev));
sysfs_remove_link(&dev->kobj, "irm_id");
sysfs_remove_link(&dev->kobj, "busmgr_id");
sysfs_remove_link(&dev->kobj, "host_id");
......@@ -792,7 +822,7 @@ static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr
ne = kzalloc(sizeof(*ne), GFP_KERNEL);
if (!ne)
return NULL;
goto fail_alloc;
ne->host = host;
ne->nodeid = nodeid;
......@@ -815,12 +845,15 @@ static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr
snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
(unsigned long long)(ne->guid));
device_register(&ne->device);
class_device_register(&ne->class_dev);
if (device_register(&ne->device))
goto fail_devreg;
if (class_device_register(&ne->class_dev))
goto fail_classdevreg;
get_device(&ne->device);
if (ne->guid_vendor_oui)
device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui);
if (ne->guid_vendor_oui &&
device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui))
goto fail_addoiu;
nodemgr_create_ne_dev_files(ne);
nodemgr_update_bus_options(ne);
......@@ -830,6 +863,18 @@ static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr
NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
return ne;
fail_addoiu:
put_device(&ne->device);
fail_classdevreg:
device_unregister(&ne->device);
fail_devreg:
kfree(ne);
fail_alloc:
HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
return NULL;
}
......@@ -891,13 +936,25 @@ static void nodemgr_register_device(struct node_entry *ne,
snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
ne->device.bus_id, ud->id);
device_register(&ud->device);
class_device_register(&ud->class_dev);
if (device_register(&ud->device))
goto fail_devreg;
if (class_device_register(&ud->class_dev))
goto fail_classdevreg;
get_device(&ud->device);
if (ud->vendor_oui)
device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
if (ud->vendor_oui &&
device_create_file(&ud->device, &dev_attr_ud_vendor_oui))
goto fail_addoui;
nodemgr_create_ud_dev_files(ud);
return;
fail_addoui:
put_device(&ud->device);
fail_classdevreg:
device_unregister(&ud->device);
fail_devreg:
HPSB_ERR("Failed to create unit %s", ud->device.bus_id);
}
......@@ -1094,10 +1151,16 @@ static void nodemgr_process_root_directory(struct host_info *hi, struct node_ent
last_key_id = kv->key.id;
}
if (ne->vendor_oui)
device_create_file(&ne->device, &dev_attr_ne_vendor_oui);
if (ne->vendor_name_kv)
device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv);
if (ne->vendor_oui &&
device_create_file(&ne->device, &dev_attr_ne_vendor_oui))
goto fail;
if (ne->vendor_name_kv &&
device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv))
goto fail;
return;
fail:
HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
(unsigned long long)ne->guid);
}
#ifdef CONFIG_HOTPLUG
......@@ -1170,7 +1233,7 @@ int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
if (!ret)
nodemgr_create_drv_files(driver);
return ret;
return 0;
}
void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
......@@ -1327,7 +1390,7 @@ static void nodemgr_suspend_ne(struct node_entry *ne)
NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
ne->in_limbo = 1;
device_create_file(&ne->device, &dev_attr_ne_in_limbo);
WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
down_write(&ne->device.bus->subsys.rwsem);
list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
......@@ -1498,7 +1561,7 @@ static void nodemgr_node_probe(struct host_info *hi, int generation)
* just removed. */
if (generation == get_hpsb_generation(host))
bus_rescan_devices(&ieee1394_bus_type);
WARN_ON(bus_rescan_devices(&ieee1394_bus_type));
return;
}
......
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