From 11318456a3650ed8bd91e7a021bd7eb2af5779f2 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Tue, 8 Sep 1998 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1998-09-08

---
 port/devmnt.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/port/devmnt.c b/port/devmnt.c
index a8cb1843393e8b31dd5c228cbbd5202fad7f08dc..a3ad25e925db93ee0a793e621e419e702fbb30e3 100644
--- a/port/devmnt.c
+++ b/port/devmnt.c
@@ -573,7 +573,7 @@ mntrdwr(int type, Chan *c, void *buf, long n, vlong off)
  	Mntrpc *r;
 	char *uba;
 	int cache;
-	ulong cnt, nr;
+	ulong cnt, nr, nreq;
 
 	m = mntchk(c);
 	uba = buf;
@@ -593,9 +593,10 @@ mntrdwr(int type, Chan *c, void *buf, long n, vlong off)
 		r->request.data = uba;
 		r->request.count = limit(n, m->blocksize);
 		mountrpc(m, r);
+		nreq = r->request.count;
 		nr = r->reply.count;
-		if(nr > r->request.count)
-			nr = r->request.count;
+		if(nr > nreq)
+			nr = nreq;
 
 		if(type == Tread)
 			memmove(uba, r->reply.data, nr);
@@ -608,7 +609,7 @@ mntrdwr(int type, Chan *c, void *buf, long n, vlong off)
 		uba += nr;
 		cnt += nr;
 		n -= nr;
-		if(nr != r->request.count || n == 0 || up->nnote)
+		if(nr != nreq || n == 0 || up->nnote)
 			break;
 	}
 	return cnt;