From: john stultz <johnstul@us.ibm.com>
Date: Tue, 13 Dec 2005 06:17:13 +0000 (-0800)
Subject: [PATCH] x86_64: Fix collision between pmtimer and pit/hpet
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=fd4954714e8e7db9f6eb5878fa6111c46445ca81;p=openwrt%2Fstaging%2Fblogic.git

[PATCH] x86_64: Fix collision between pmtimer and pit/hpet

On systems that do not support the HPET legacy functions (basically the IBM
x460, but there could be others), in time_init() we accidentally fall into a
PM timer conditional and set the vxtime_hz value to the PM timer's frequency.
We then use this value with the HPET for timekeeping.

This patch (which mimics the behavior in time_init_gtod) corrects the
collision.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c
index 4434e154f596..74102796e5c0 100644
--- a/arch/x86_64/kernel/time.c
+++ b/arch/x86_64/kernel/time.c
@@ -915,7 +915,7 @@ void __init time_init(void)
 		cpu_khz = hpet_calibrate_tsc();
 		timename = "HPET";
 #ifdef CONFIG_X86_PM_TIMER
-	} else if (pmtmr_ioport) {
+	} else if (pmtmr_ioport && !vxtime.hpet_address) {
 		vxtime_hz = PM_TIMER_FREQUENCY;
 		timename = "PM";
 		pit_init();