From 964f7857d84c8c14886bc21da79aaba8d6b0ce9c Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Fri, 15 May 1998 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1998-05-15

---
 ip/ipifc.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ip/ipifc.c b/ip/ipifc.c
index 481c35cd54bad3c56bbba506f28f21ef1ad5fd5c..ae724e2146785739b897093df314684be04baad6 100644
--- a/ip/ipifc.c
+++ b/ip/ipifc.c
@@ -165,7 +165,8 @@ ipifcunbind(Ipifc *ifc)
 	ifc->ifcid++;
 
 	/* disassociate device */
-	(*ifc->m->unbind)(ifc);
+	if(ifc->m)
+		(*ifc->m->unbind)(ifc);
 	memset(ifc->dev, 0, sizeof(ifc->dev));
 	ifc->arg = nil;
 
@@ -293,7 +294,7 @@ ipifcclose(Conv *c)
 
 	ifc = (Ipifc*)c->ptcl;
 	m = ifc->m;
-	if(m != nil && m->unbindonclose)
+	if(m == nil || m->unbindonclose)
 		ipifcunbind(ifc);
 	unlock(c);
 }