From f4413c52f1d6742f5daf3a32662abbd40069983e Mon Sep 17 00:00:00 2001
From: Miod Vallat <miod@cvs.openbsd.org>
Date: Fri, 26 Oct 2012 16:26:14 +0000
Subject: Previous revision would prevent grtwo(4) boards from being
 recognized. Make sure that what seems to be a 8-bit ID register of value zero
 does not match as an expansion board, which it can't be, and continue with
 the specific frame buffer test logic.

---
 sys/arch/sgi/gio/gio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'sys/arch')

diff --git a/sys/arch/sgi/gio/gio.c b/sys/arch/sgi/gio/gio.c
index 3a4a24fb257..47623c092d1 100644
--- a/sys/arch/sgi/gio/gio.c
+++ b/sys/arch/sgi/gio/gio.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: gio.c,v 1.13 2012/07/18 20:56:46 miod Exp $	*/
+/*	$OpenBSD: gio.c,v 1.14 2012/10/26 16:26:13 miod Exp $	*/
 /*	$NetBSD: gio.c,v 1.32 2011/07/01 18:53:46 dyoung Exp $	*/
 
 /*
@@ -389,7 +389,7 @@ gio_id(vaddr_t va, paddr_t pa, int maybe_gfx)
 	 */
 
 	if ((id32 & 0xffff) == id16 && (id32 & 0xff) == id8 &&
-	    !GIO_PRODUCT_32BIT_ID(id8))
+	    !GIO_PRODUCT_32BIT_ID(id8) && id8 != 0x00)
 		return /*GIO_PRODUCT_PRODUCTID*/(id8);
 
 	/*
-- 
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