From ef7915fc4bf7204876b4aca6698fd84668676a41 Mon Sep 17 00:00:00 2001
From: Sepherosa Ziehau <sephe@dragonflybsd.org>
Date: Fri, 23 Sep 2011 09:51:05 +0800
Subject: [PATCH] kevent(2): Set errno properly

If we can't deliver the registration failure information in the
changelist, then we should set the errno properly.
---
 sys/kern/kern_event.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/kern/kern_event.c b/sys/kern/kern_event.c
index 0c4c30cfab..bd5ac9a3d9 100644
--- a/sys/kern/kern_event.c
+++ b/sys/kern/kern_event.c
@@ -625,7 +625,9 @@ kern_kevent(struct kqueue *kq, int nevents, int *res, void *uap,
 				kevp->data = error;
 				lres = *res;
 				kevent_copyoutfn(uap, kevp, 1, res);
-				if (lres != *res) {
+				if (*res < 0) {
+					goto done;
+				} else if (lres != *res) {
 					nevents--;
 					nerrors++;
 				}
-- 
2.41.0