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IB/core: Fix kobject leak on device register error flow 

The ports kobject isn't being released during error flow in device
registration.  This patch refactors the ports kobject cleanup into a
single function called from both the error flow in device registration
and from the unregistration function.

A couple of attributes aren't being deleted (iw_stats_group, and
ib_class_attributes).  While this may be handled implicitly by the
destruction of their kobjects, it seems better to handle all the
attributes the same way.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>

[ Make free_port_list_attributes() static.  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Haggai Eran 2014-05-18 11:12:26 +03:00 committed by Roland Dreier
parent cad6d02acc
commit 584482ac80
1 changed files with 26 additions and 26 deletions
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52
drivers/infiniband/core/sysfs.c
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@ -816,6 +816,22 @@ static struct attribute_group iw_stats_group = {
.attrs = iw_proto_stats_attrs,
};
static void free_port_list_attributes(struct ib_device *device)
{
struct kobject *p, *t;
list_for_each_entry_safe(p, t, &device->port_list, entry) {
struct ib_port *port = container_of(p, struct ib_port, kobj);
list_del(&p->entry);
sysfs_remove_group(p, &pma_group);
sysfs_remove_group(p, &port->pkey_group);
sysfs_remove_group(p, &port->gid_group);
kobject_put(p);
}
kobject_put(device->ports_parent);
}
int ib_device_register_sysfs(struct ib_device *device,
int (*port_callback)(struct ib_device *,
u8, struct kobject *))
@ -869,19 +885,7 @@ int ib_device_register_sysfs(struct ib_device *device,
return 0;
err_put:
{
struct kobject *p, *t;
struct ib_port *port;
list_for_each_entry_safe(p, t, &device->port_list, entry) {
list_del(&p->entry);
port = container_of(p, struct ib_port, kobj);
sysfs_remove_group(p, &pma_group);
sysfs_remove_group(p, &port->pkey_group);
sysfs_remove_group(p, &port->gid_group);
kobject_put(p);
}
}
free_port_list_attributes(device);
err_unregister:
device_unregister(class_dev);
@ -892,22 +896,18 @@ err:
void ib_device_unregister_sysfs(struct ib_device *device)
{
struct kobject *p, *t;
struct ib_port *port;
/* Hold kobject until ib_dealloc_device() */
kobject_get(&device->dev.kobj);
struct kobject *kobj_dev = kobject_get(&device->dev.kobj);
int i;
list_for_each_entry_safe(p, t, &device->port_list, entry) {
list_del(&p->entry);
port = container_of(p, struct ib_port, kobj);
sysfs_remove_group(p, &pma_group);
sysfs_remove_group(p, &port->pkey_group);
sysfs_remove_group(p, &port->gid_group);
kobject_put(p);
}
if (device->node_type == RDMA_NODE_RNIC && device->get_protocol_stats)
sysfs_remove_group(kobj_dev, &iw_stats_group);
free_port_list_attributes(device);
for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i)
device_remove_file(&device->dev, ib_class_attributes[i]);
kobject_put(device->ports_parent);
device_unregister(&device->dev);
}