xfrm: policy: xfrm_policy_unregister_afinfo can return void
Nothing checks the return value. Also, the errors returned on unregister
are impossible (we only support INET and INET6, so no way
xfrm_policy_afinfo[afinfo->family] can be anything other than 'afinfo'
itself).
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index da0e4dd..39037b1 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -304,7 +304,7 @@
};
int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
-int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
+void xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
void km_policy_notify(struct xfrm_policy *xp, int dir,
const struct km_event *c);
void km_state_notify(struct xfrm_state *x, const struct km_event *c);
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 6fffa2f..794148f7 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2883,34 +2883,25 @@
}
EXPORT_SYMBOL(xfrm_policy_register_afinfo);
-int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo)
+void xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo)
{
- int err = 0;
- if (unlikely(afinfo == NULL))
- return -EINVAL;
+ struct dst_ops *dst_ops = afinfo->dst_ops;
+
if (unlikely(afinfo->family >= NPROTO))
- return -EAFNOSUPPORT;
- spin_lock(&xfrm_policy_afinfo_lock);
- if (likely(xfrm_policy_afinfo[afinfo->family] != NULL)) {
- if (unlikely(xfrm_policy_afinfo[afinfo->family] != afinfo))
- err = -EINVAL;
- else
- RCU_INIT_POINTER(xfrm_policy_afinfo[afinfo->family],
+ return;
+
+ if (likely(xfrm_policy_afinfo[afinfo->family] != afinfo)) {
+ RCU_INIT_POINTER(xfrm_policy_afinfo[afinfo->family],
NULL);
}
- spin_unlock(&xfrm_policy_afinfo_lock);
- if (!err) {
- struct dst_ops *dst_ops = afinfo->dst_ops;
- synchronize_rcu();
+ synchronize_rcu();
- dst_ops->kmem_cachep = NULL;
- dst_ops->check = NULL;
- dst_ops->negative_advice = NULL;
- dst_ops->link_failure = NULL;
- afinfo->garbage_collect = NULL;
- }
- return err;
+ dst_ops->kmem_cachep = NULL;
+ dst_ops->check = NULL;
+ dst_ops->negative_advice = NULL;
+ dst_ops->link_failure = NULL;
+ afinfo->garbage_collect = NULL;
}
EXPORT_SYMBOL(xfrm_policy_unregister_afinfo);