From 30f3174d1c506db2c6d2c1dddc9c064e741d6b76 Mon Sep 17 00:00:00 2001 From: john stultz Date: Thu, 31 Aug 2006 21:27:37 -0700 Subject: [PATCH] Fix faulty HPET clocksource usage (fix for bug #7062) Apparently some systems export valid HPET addresses, but hpet_enable() fails. Then when the HPET clocksource starts up, it only checks for a valid HPET address, and the result is a system where time does not advance. See http://bugme.osdl.org/show_bug.cgi?id=7062 for details. This patch just makes sure we better check that the HPET is functional before registering the HPET clocksource. Signed-off-by: John Stultz Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/kernel/hpet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/i386/kernel/hpet.c b/arch/i386/kernel/hpet.c index c6737c35815d..17647a530b2f 100644 --- a/arch/i386/kernel/hpet.c +++ b/arch/i386/kernel/hpet.c @@ -35,7 +35,7 @@ static int __init init_hpet_clocksource(void) void __iomem* hpet_base; u64 tmp; - if (!hpet_address) + if (!is_hpet_enabled()) return -ENODEV; /* calculate the hpet address: */ -- cgit v1.2.1