From 7f68d62b3b2ad5f8202a0fd841c4659b73ab8d99 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Tue, 11 Jun 1996 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1996-06-11

---
 port/qio.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/port/qio.c b/port/qio.c
index 77aeb9727a8c7e64f0ae79e4d47caddd083fe1fe..a5f33f9dc2521b4505679e396217ac236a6f8366 100644
--- a/port/qio.c
+++ b/port/qio.c
@@ -807,7 +807,7 @@ pullupblock(Block *bp, int n)
 	n -= BLEN(bp);
 	while(nbp = bp->next){
 		i = BLEN(nbp);
-		if(i >= n) {
+		if(i > n) {
 			memmove(bp->wp, nbp->rp, n);
 			bp->wp += n;
 			nbp->rp += n;
@@ -820,6 +820,8 @@ pullupblock(Block *bp, int n)
 			nbp->next = 0;
 			freeb(nbp);
 			n -= i;
+			if(n == 0)
+				return bp;
 		}
 	}
 	freeb(bp);