diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index fabc79e2e6dbc5cf244eb86740394cb89377c54d..33d42df70051aca608c714df9922d2b67258a9c1 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -5147,12 +5147,16 @@ int ipv6_sysctl_rtcache_flush(struct ctl_table *ctl, int write,
 {
 	struct net *net;
 	int delay;
+	int ret;
 	if (!write)
 		return -EINVAL;
 
 	net = (struct net *)ctl->extra1;
 	delay = net->ipv6.sysctl.flush_delay;
-	proc_dointvec(ctl, write, buffer, lenp, ppos);
+	ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
+	if (ret)
+		return ret;
+
 	fib6_run_gc(delay <= 0 ? 0 : (unsigned long)delay, net, delay > 0);
 	return 0;
 }