From 37402373e962bc2df4da191c89fb39da34833968 Mon Sep 17 00:00:00 2001
From: Marcel Moolenaar <marcel@FreeBSD.org>
Date: Sun, 1 Apr 2007 06:15:53 +0000
Subject: [PATCH] When writing to PCI configuration registers, don't
 immediately read the same register back. It can cause hangs or machine checks
 in certain cases. One particular case is with bge(4) when a reset is
 initiated for the controller.

MFC after: 1 month
---
 sys/powerpc/powermac/uninorth.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/sys/powerpc/powermac/uninorth.c b/sys/powerpc/powermac/uninorth.c
index fb1674d37a19..97bd80df1f42 100644
--- a/sys/powerpc/powermac/uninorth.c
+++ b/sys/powerpc/powermac/uninorth.c
@@ -303,15 +303,12 @@ uninorth_write_config(device_t dev, u_int bus, u_int slot, u_int func,
 		switch (width) {
 		case 1:
 			out8rb(caoff, val);
-			(void)in8rb(caoff);
 			break;
 		case 2:
 			out16rb(caoff, val);
-			(void)in16rb(caoff);
 			break;
 		case 4:
 			out32rb(caoff, val);
-			(void)in32rb(caoff);
 			break;
 		}
 	}