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[PATCH] Fix faulty HPET clocksource usage (fix for bug #7062)

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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 <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
john stultz
2006-08-31 21:27:37 -07:00
committed by Linus Torvalds
parent 202af6d501
commit 30f3174d1c
1 changed files with 1 additions and 1 deletions
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2
arch/i386/kernel/hpet.c
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@@ -35,7 +35,7 @@ static int __init init_hpet_clocksource(void)
void __iomem* hpet_base; void __iomem* hpet_base;
u64 tmp; u64 tmp;
if (!hpet_address) if (!is_hpet_enabled())
return -ENODEV; return -ENODEV;
/* calculate the hpet address: */ /* calculate the hpet address: */