RE: acpi exception with current -mm lineup (HPET)

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>-----Original Message-----
>From: Len Brown [mailto:lenb@xxxxxxxxxx] 
>Sent: Wednesday, May 30, 2007 11:02 PM
>To: Andrew Morton; Pallipadi, Venkatesh
>Cc: linux-acpi@xxxxxxxxxxxxxxx
>Subject: Re: acpi exception with current -mm lineup (HPET)
>
>
>> I put a copy of /proc/acpi/dsdt at 
>http://userweb.kernel.org/~akpm/dsdt
>> if that's any help.
>> 
>> Full dmesg at http://userweb.kernel.org/~akpm/dmesg-x.txt
>
>Okay, this BIOS actually has a real HPET table:
>
>ACPI: HPET 7FFD7460, 0038 (r1 A M I  OEMHPET   5000427 MSFT       97)
>
>and the hpet is actually found:
>
>Calling initcall 0xffffffff80652488: late_hpet_init+0x0/0xd1()
>hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
>hpet0: 3 64-bit timers, 14318180 Hz
>initcall 0xffffffff80652488: late_hpet_init+0x0/0xd1() returned 0.
>initcall 0xffffffff80652488 ran for 0 msecs: late_hpet_init+0x0/0xd1()
>...
>
>Perhaps Venki can comment on if the resource conflict is expected
>to be fatal or not.
>


The issue seems to be HPET at two different places in BIOS/ACPI.
One listing is in MADT which is used to set up kernel timer and
which reserves this resource earlier

hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0

And later hpet character driver is finding HPET listed in _CRS
And finds it is the same HPET as the one looked at before
Causing this conflict. Totally nonfatal.
Just correcting the return type of hpet_resources should be fine here.

Thanks,
Venki 
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