From 6fff4a5382b536b5345c90c0c72c2fae158b191f Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sat, 28 Mar 1992 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1992-03-28

---
 port/devlance.c | 4 ++--
 port/devproc.c  | 2 ++
 port/proc.c     | 2 ++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/port/devlance.c b/port/devlance.c
index 222daaac38c718b4c8302c35f94f4392c2e52e45..0e262a1ca8f1fffcdadf7d3fddc8adaf96e475ad 100644
--- a/port/devlance.c
+++ b/port/devlance.c
@@ -348,10 +348,10 @@ lanceoput(Queue *q, Block *bp )
 	tsleep(&l.tr, isobuf, (void *)0, 1000);
 	if(isobuf(0) == 0 || l.misses > 4){
 		l.misses = 0;
-		print("lance wedged, restarting\n");
+print("lance wedged, restarting\n");
 		lancestart(0, 0);
-		qunlock(&l.tlock);
 		freeb(bp);
+		poperror();
 		return;		/* the interrupt routine will qunlock(&l.tlock) */
 	}
 	p = &l.tp[l.tc];
diff --git a/port/devproc.c b/port/devproc.c
index 24d80a6912c94582adf7777afc0977038611fcee..5c9075526bc8e37e066f3258a4b7f18d4629beb2 100644
--- a/port/devproc.c
+++ b/port/devproc.c
@@ -330,6 +330,8 @@ procread(Chan *c, void *va, long n, ulong offset)
 			return 0;
 		if(offset+n > STATSIZE)
 			n = STATSIZE - offset;
+if((p->state < Dead) || (p->state > Rendezvous))
+    panic("p->state=#%lux, p->psstate=#%lux\n", p->state, p->psstate);
 		j = sprint(statbuf, "%-27s %-27s %-11s ",
 			p->text, p->user, p->psstate ? p->psstate : statename[p->state]);
 		for(i=0; i<6; i++){
diff --git a/port/proc.c b/port/proc.c
index 53058a5b08e97c1d6ca306f86d4208ce62166609..0d89ea7184cff45ac2811191b8380849920f93bf 100644
--- a/port/proc.c
+++ b/port/proc.c
@@ -641,6 +641,8 @@ pwait(Waitmsg *w)
 Proc*
 proctab(int i)
 {
+if((i < 0) || (i >= conf.nproc))
+    panic("proctab(%d)\n", i);
 	return &procalloc.arena[i];
 }