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x86: HPET: read from HPET_Tn_CMP() not HPET_T0_CMP

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In hpet_next_event() we check that the value we just wrote to
HPET_Tn_CMP(timer) has reached the chip. Currently, we're checking that
the value we wrote to HPET_Tn_CMP(timer) is in HPET_T0_CMP, which, if
timer is anything other than timer 0, is likely to fail.

Signed-off-by: Matt Fleming <mjf@gentoo.org>
Cc: mingo@elte.hu
Cc: venkatesh.pallipadi@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Matt Fleming 2008-11-02 16:04:20 +00:00 committed by Thomas Gleixner
parent 1de5b08546
commit 89d77a1eb6
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/hpet.c
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@ -322,7 +322,7 @@ static int hpet_next_event(unsigned long delta,
* what we wrote hit the chip before we compare it to the
* counter.
*/
WARN_ON_ONCE((u32)hpet_readl(HPET_T0_CMP) != cnt);
WARN_ON_ONCE((u32)hpet_readl(HPET_Tn_CMP(timer)) != cnt);
return (s32)((u32)hpet_readl(HPET_COUNTER) - cnt) >= 0 ? -ETIME : 0;
}