From c4153b7755e3a4f3cab57ad8cbe85d18cc7cbd77 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@gmx.de>
Date: Mon, 27 May 2013 01:09:34 +0200
Subject: [PATCH] kernel: closechanq error

catch potential interrupt error from kproc(). this can happen when
we run out of processes, then newproc() will call rsrcwait()
which does tsleep(). if the process gets a note, this might
raise a interrupt error.
---
 sys/src/9/port/chan.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sys/src/9/port/chan.c b/sys/src/9/port/chan.c
index d0d0ce4bb..9577eb8d3 100644
--- a/sys/src/9/port/chan.c
+++ b/sys/src/9/port/chan.c
@@ -536,7 +536,10 @@ closechanq(Chan *c)
 	if(up != 0 && palloc.Lock.p != up && canqlock(&clunkq.q)){
 		c = up->dot;
 		up->dot = nil;
-		kproc("closeproc", closeproc, nil);
+		if(!waserror()){
+			kproc("closeproc", closeproc, nil);
+			poperror();
+		}
 		up->dot = c;
 	}else
 		wakeup(&clunkq.r);