From 52a84514acca8c2afc7e33c6f3f7d95235cad75e Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@gmx.de>
Date: Tue, 27 Aug 2013 23:26:30 +0200
Subject: [PATCH] devmouse: fix openmode() handling

openmode() can raise error with invalid mode passed, but we already
incremented the exclusive mouse refcount at that point! call openmode()
early to avoid this.
---
 sys/src/9/port/devmouse.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sys/src/9/port/devmouse.c b/sys/src/9/port/devmouse.c
index c16ed0b60..2f8ffe6e2 100644
--- a/sys/src/9/port/devmouse.c
+++ b/sys/src/9/port/devmouse.c
@@ -170,6 +170,9 @@ mousestat(Chan *c, uchar *db, int n)
 static Chan*
 mouseopen(Chan *c, int omode)
 {
+	int mode;
+
+	mode = openmode(omode);
 	switch((ulong)c->qid.path){
 	case Qdir:
 		if(omode != OREAD)
@@ -193,7 +196,7 @@ mouseopen(Chan *c, int omode)
 	default:
 		incref(&mouse);
 	}
-	c->mode = openmode(omode);
+	c->mode = mode;
 	c->flag |= COPEN;
 	c->offset = 0;
 	return c;