[src/kqueue]: src/sys/kern improve previous - don't try to do anything if the...

[jdolecek <jdolecek%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4a3fbee9170d
branches:  kqueue
changeset: 512504:4a3fbee9170d
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Sun Sep 22 08:37:32 2002 +0000

description:
improve previous - don't try to do anything if the 'read' end of pipe
is already closed, pipe_peer is NULL in that case

diffstat:

 sys/kern/sys_pipe.c |  9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diffs (30 lines):

diff -r 46036b6951c6 -r 4a3fbee9170d sys/kern/sys_pipe.c
--- a/sys/kern/sys_pipe.c       Sat Sep 21 19:50:44 2002 +0000
+++ b/sys/kern/sys_pipe.c       Sun Sep 22 08:37:32 2002 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sys_pipe.c,v 1.5.2.9 2002/09/21 19:40:35 jdolecek Exp $        */
+/*     $NetBSD: sys_pipe.c,v 1.5.2.10 2002/09/22 08:37:32 jdolecek Exp $       */
 
 /*
  * Copyright (c) 1996 John S. Dyson
@@ -58,7 +58,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sys_pipe.c,v 1.5.2.9 2002/09/21 19:40:35 jdolecek Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sys_pipe.c,v 1.5.2.10 2002/09/22 08:37:32 jdolecek Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -1910,6 +1910,11 @@
        case EVFILT_WRITE:
                /* need the peer structure, not our own */
                cpipe = cpipe->pipe_peer;
+
+               /* if reader end already closed, just return */
+               if (!cpipe)
+                       return;
+
                break;
        default:
                /* nothing to do */