Re: Compaq Evo 510SFF and ACPI

[Alexander Hoogerhuis <alexh-rpjHciJLgqZBDgjK7y7TUQ@public.gmane.org>]

Scott Duplichan <sduplichan-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> writes:

> Alexander Hoogerhuis <alexh-KJKxBnNiUAU@public.gmane.org> wrote:
> 
> >I have a few Compaq Evo's that show the same symptom:
> > 
> > ACPI: Searched entire block, no RSDP was found.
> > ACPI: RSDP located at physical address c00eaa10
> > RSD PTR  v0 [COMPAQ]
> > __va_range(0xf7f7b40, 0x68): idx=10 mapped at ffff5000
> > ACPI table found: RSDT v1 [COMPAQ CPQ0050  8194.4656]
> > ACPI: Too big length in RSDT: 120
> 
> 120 bytes minus 36 bytes leaves 84 bytes, or 21 table pointers.
> I think some versions of Linux have a limit on the number of
> tables that is smaller than 21. The ACPI spec lacks, among other
> things, any guideline on what the maximum number of tables is.
> 

Here's the offending piece of code:

        /*
         * The number of tables is computed by taking the
         * size of all entries (header size minus total
         * size of RSDT) divided by the size of each entry
         * (4-byte table pointers).
         */
        tables = (header->length - sizeof(acpi_table_header)) / 4;
                                                                                
        memcpy(&saved_rsdt, rsdt, sizeof(saved_rsdt));
                                                                                
        if (saved_rsdt.header.length > sizeof(saved_rsdt)) {
                printk(KERN_WARNING "ACPI: Too big length in RSDT: %d\n", saved_rsdt.header.length);
                return -ENODEV;
        }

...which then basically says what it found doesnt add up to what it
thinks it has?

mvh,
A
-- 
Alexander Hoogerhuis                               | alexh-rpjHciJLgqZBDgjK7y7TUQ@public.gmane.org
CCNP - CCDP - MCNE - CCSE                          | +47 908 21 485
"You have zero privacy anyway. Get over it."  --Scott McNealy


-------------------------------------------------------
This SF.Net email sponsored by: Free pre-built ASP.NET sites including
Data Reports, E-commerce, Portals, and Forums are available now.
Download today and enter to win an XBOX or Visual Studio .NET.
http://aspnet.click-url.com/go/psa00100006ave/direct;at.asp_061203_01/01