RE: [PATCH 14/16] ACPICA: Add several repairs for _CST predefined name

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Fixes these possible problems. I think we've actually seen at least one of these, not sure where/when:

 * DESCRIPTION: Repair for the _CST object:
 *              1. Sort the list ascending by C state type
 *              2. Ensure type cannot be zero
 *              3. A sub-package count of zero means _CST is meaningless
 *              4. Count must match the number of C state sub-packages




> -----Original Message-----
> From: Rafael J. Wysocki [mailto:rjw@xxxxxxx]
> Sent: Tuesday, June 18, 2013 2:49 PM
> To: Moore, Robert
> Cc: Len Brown; Zheng, Lv; Wysocki, Rafael J; Brown, Len; linux acpi
> Subject: Re: [PATCH 14/16] ACPICA: Add several repairs for _CST predefined
> name
> 
> On Tuesday, June 18, 2013 06:51:45 PM Moore, Robert wrote:
> > Correct, additional _CST sanity checks and repairs.
> 
> OK, and what AML breakage does it help against, in particular?
> 
> Rafael
> 
> 
> > > -----Original Message-----
> > > From: lenb417@xxxxxxxxx [mailto:lenb417@xxxxxxxxx] On Behalf Of Len
> > > Brown
> > > Sent: Wednesday, June 12, 2013 10:59 AM
> > > To: Zheng, Lv
> > > Cc: Wysocki, Rafael J; Moore, Robert; Brown, Len; linux acpi
> > > Subject: Re: [PATCH 14/16] ACPICA: Add several repairs for _CST
> > > predefined name
> > >
> > > On Fri, Jun 7, 2013 at 9:01 PM, Lv Zheng <lv.zheng@xxxxxxxxx> wrote:
> > > > Sort list based on the C-state, remove invalid/zero entries.
> > > > ACPICA BZ 890. Lv Zheng.
> > >
> > > The commit message should not just say what the code does, it should
> > > more importantly answer WHY the change was made, and why anybody
> > > should care about the patch.
> > >
> > > I think the answer here is that we are adding _CST sanity checking
> > > -- presumably to deal with buggy AML?
> > >
> > > What will we see happen after this patch that we did not see before
> it?
> > >
> > > Nacked-by: Len Brown <len.brown@xxxxxxxxx>
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-acpi"
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> --
> I speak only for myself.
> Rafael J. Wysocki, Intel Open Source Technology Center.
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