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path: root/net/batman-adv/bat_sysfs.c
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Diffstat (limited to 'net/batman-adv/bat_sysfs.c')
-rw-r--r--net/batman-adv/bat_sysfs.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/net/batman-adv/bat_sysfs.c b/net/batman-adv/bat_sysfs.c
index e449bf6353e0..497a0700cc3c 100644
--- a/net/batman-adv/bat_sysfs.c
+++ b/net/batman-adv/bat_sysfs.c
@@ -488,22 +488,24 @@ static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
(strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
goto out;
+ if (!rtnl_trylock()) {
+ ret = -ERESTARTSYS;
+ goto out;
+ }
+
if (status_tmp == IF_NOT_IN_USE) {
- rtnl_lock();
hardif_disable_interface(hard_iface);
- rtnl_unlock();
- goto out;
+ goto unlock;
}
/* if the interface already is in use */
- if (hard_iface->if_status != IF_NOT_IN_USE) {
- rtnl_lock();
+ if (hard_iface->if_status != IF_NOT_IN_USE)
hardif_disable_interface(hard_iface);
- rtnl_unlock();
- }
ret = hardif_enable_interface(hard_iface, buff);
+unlock:
+ rtnl_unlock();
out:
hardif_free_ref(hard_iface);
return ret;