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Subject: RE: one more ACPI Error (utglobal-0125): Unknown exception
	code:0xFFFFFFEA [Re: 2.6.18-rc4-mm3]
From: keith mannthey <kmannth@us.ibm.com>
Reply-To: kmannth@us.ibm.com
To: "Moore, Robert" <robert.moore@intel.com>
Cc: Len Brown <lenb@kernel.org>, "Li, Shaohua" <shaohua.li@intel.com>,
       Mattia Dongili <malattia@linux.it>, Andrew Morton <akpm@osdl.org>,
       lkml <linux-kernel@vger.kernel.org>,
       linux acpi <linux-acpi@vger.kernel.org>,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
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References: <B28E9812BAF6E2498B7EC5C427F293A4DB67EC@orsmsx415.amr.corp.intel.com>
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Organization: Linux Technology Center IBM
Date: Thu, 31 Aug 2006 10:56:27 -0700
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On Thu, 2006-08-31 at 10:02 -0700, Moore, Robert wrote: 
> Return AE_OK to continue the walk. AE_CTRL_DEPTH will cause the walk to
> continue, but go no further down the current branch of the namespace.
> 
> Anything other than these two exceptions will completely abort the walk.

Let me check with AE_OK (this is non-zero?).  It will be several hours. 

Thanks,
  Keith 


> > -----Original Message-----
> > From: keith mannthey [mailto:kmannth@us.ibm.com]
> > Sent: Thursday, August 31, 2006 9:49 AM
> > To: Len Brown
> > Cc: Moore, Robert; Li, Shaohua; Mattia Dongili; Andrew Morton; lkml;
> linux
> > acpi; KAMEZAWA Hiroyuki
> > Subject: Re: one more ACPI Error (utglobal-0125): Unknown exception
> > code:0xFFFFFFEA [Re: 2.6.18-rc4-mm3]
> > 
> > On Thu, 2006-08-31 at 02:48 -0400, Len Brown wrote:
> > > On Tuesday 29 August 2006 16:04, Moore, Robert wrote:
> > > > As far as the unknown exception,
> > > >
> > > > >[    9.392729]  [<c0246fb6>] acpi_ut_status_exit+0x31/0x5e
> > > > >[    9.393453]  [<c0243352>] acpi_walk_resources+0x10e/0x11b
> > > > >[    9.394174]  [<c025697e>] acpi_motherboard_add+0x22/0x31
> > > >
> > > > I would guess that the callback routine for walk_resources is
> > returning
> > > > a non-zero status value which is causing an immediate abort of the
> > walk
> > > > with that value -- and the value is bogus.
> > 
> >   Before I put this check in acpi_motherboard_add always attached
> itself
> > to any resource type. I simply changed it so if the type is not
> > ACPI_RESOURCE_TYPE_IO or ACPI_RESOURCE_TYPE_FIXED_IO it doesn't attach
> > and can continue to find the correct device to attach to.
> > 
> >   Perhaps the motherboard device needs to attach to more device types?
> > 
> >   It was suggest by acpi folks to return -EINVAL.  Should something
> else
> > be returned?
> > 
> > 
> > Thanks,
> >   Keith
> > 
> > > Yep, see -EINVAL below.
> > >
> > > -Len
> > >
> > >
> http://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-
> > rc4/2.6.18-rc4-mm3/broken-out/hot-add-mem-x86_64-acpi-motherboard-
> > fix.patch
> > >
> > >
> > >
> > > From: Keith Mannthey <kmannth@us.ibm.com>
> > >
> > > This patch set allow SPARSEMEM and RESERVE based hot-add to work.  I
> > have
> > > test both options and they work as expected.  I am adding memory to
> the
> > > 2nd node of a numa system (x86_64).
> > >
> > > Major changes from last set is the config change and RESERVE
> enablment.
> > >
> > >
> > > This patch:
> > >
> > >
> > > Make ACPI motherboard driver not attach to devices/handles it
> dosen't
> > expect.
> > > Fix a bug where the motherboard driver attached to hot-add memory
> event
> > and
> > > caused the add memory call to fail.
> > >
> > > Signed-off-by: Keith Mannthey<kmannth@us.ibm.com>
> > > Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> > > Cc: Andi Kleen <ak@muc.de>
> > > Signed-off-by: Andrew Morton <akpm@osdl.org>
> > > ---
> > >
> > >
> > > diff -puN drivers/acpi/motherboard.c~hot-add-mem-x86_64-acpi-
> > motherboard-fix drivers/acpi/motherboard.c
> > > ---
> a/drivers/acpi/motherboard.c~hot-add-mem-x86_64-acpi-motherboard-fix
> > > +++ a/drivers/acpi/motherboard.c
> > > @@ -87,6 +87,7 @@ static acpi_status acpi_reserve_io_range
> > >  		}
> > >  	} else {
> > >  		/* Memory mapped IO? */
> > > +		 return -EINVAL;
> > >  	}
> > >
> > >  	if (requested_res)
> > > @@ -96,11 +97,16 @@ static acpi_status acpi_reserve_io_range
> > >
> > >  static int acpi_motherboard_add(struct acpi_device *device)
> > >  {
> > > +	acpi_status status;
> > >  	if (!device)
> > >  		return -EINVAL;
> > > -	acpi_walk_resources(device->handle, METHOD_NAME__CRS,
> > > +
> > > +	status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
> > >  			    acpi_reserve_io_ranges, NULL);
> > >
> > > +	if (ACPI_FAILURE(status))
> > > +		return -ENODEV;
> > > +
> > >  	return 0;
> > >  }
> > >
> > > _

-
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