IPVS: ip_vs_{un,}bind_scheduler NULL arguments

In general NULL arguments aren't passed by the few callers that exist,
so don't test for them.

The exception is to make passing NULL to ip_vs_unbind_scheduler() a noop.

Signed-off-by: Simon Horman <horms@verge.net.au>
Acked-by: Julian Anastasov <ja@ssi.bg>

2 files changed, 4 insertions, 22 deletions

diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index f7afcfe4dbc..5f20caf47a1 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -1206,8 +1206,7 @@ ip_vs_add_service(struct ip_vs_service_user_kern *u,
 
  out_err:
         if (svc != NULL) {
-                if (svc->scheduler)
-                        ip_vs_unbind_scheduler(svc);
+                ip_vs_unbind_scheduler(svc);
                 if (svc->inc) {
                         local_bh_disable();
                         ip_vs_app_inc_put(svc->inc);
diff --git a/net/netfilter/ipvs/ip_vs_sched.c b/net/netfilter/ipvs/ip_vs_sched.c
index 9f94e328d31..076ebe00435 100644
--- a/net/netfilter/ipvs/ip_vs_sched.c
+++ b/net/netfilter/ipvs/ip_vs_sched.c
@@ -46,15 +46,6 @@ int ip_vs_bind_scheduler(struct ip_vs_service *svc,
 {
         int ret;
 
-        if (svc == NULL) {
-                pr_err("%s(): svc arg NULL\n", __func__);
-                return -EINVAL;
-        }
-        if (scheduler == NULL) {
-                pr_err("%s(): scheduler arg NULL\n", __func__);
-                return -EINVAL;
-        }
-
         svc->scheduler = scheduler;
 
         if (scheduler->init_service) {
@@ -74,18 +65,10 @@ int ip_vs_bind_scheduler(struct ip_vs_service *svc,
  */
 int ip_vs_unbind_scheduler(struct ip_vs_service *svc)
 {
-        struct ip_vs_scheduler *sched;
+        struct ip_vs_scheduler *sched = svc->scheduler;
 
-        if (svc == NULL) {
-                pr_err("%s(): svc arg NULL\n", __func__);
-                return -EINVAL;
-        }
-
-        sched = svc->scheduler;
-        if (sched == NULL) {
-                pr_err("%s(): svc isn't bound\n", __func__);
-                return -EINVAL;
-        }
+        if (!sched)
+                return 0;
 
         if (sched->done_service) {
                 if (sched->done_service(svc) != 0) {