diff options
Diffstat (limited to 'net/batman-adv/hard-interface.c')
| -rw-r--r-- | net/batman-adv/hard-interface.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index f1d37cd81815..368219e026a9 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -457,6 +457,24 @@ out: batadv_hardif_free_ref(primary_if); } +/** + * batadv_hardif_remove_interface_finish - cleans up the remains of a hardif + * @work: work queue item + * + * Free the parts of the hard interface which can not be removed under + * rtnl lock (to prevent deadlock situations). + */ +static void batadv_hardif_remove_interface_finish(struct work_struct *work) +{ + struct batadv_hard_iface *hard_iface; + + hard_iface = container_of(work, struct batadv_hard_iface, + cleanup_work); + + batadv_sysfs_del_hardif(&hard_iface->hardif_obj); + batadv_hardif_free_ref(hard_iface); +} + static struct batadv_hard_iface * batadv_hardif_add_interface(struct net_device *net_dev) { @@ -484,6 +502,9 @@ batadv_hardif_add_interface(struct net_device *net_dev) hard_iface->soft_iface = NULL; hard_iface->if_status = BATADV_IF_NOT_IN_USE; INIT_LIST_HEAD(&hard_iface->list); + INIT_WORK(&hard_iface->cleanup_work, + batadv_hardif_remove_interface_finish); + /* extra reference for return */ atomic_set(&hard_iface->refcount, 2); @@ -518,8 +539,7 @@ static void batadv_hardif_remove_interface(struct batadv_hard_iface *hard_iface) return; hard_iface->if_status = BATADV_IF_TO_BE_REMOVED; - batadv_sysfs_del_hardif(&hard_iface->hardif_obj); - batadv_hardif_free_ref(hard_iface); + queue_work(batadv_event_workqueue, &hard_iface->cleanup_work); } void batadv_hardif_remove_interfaces(void) |