Re: [PATCH 1/2] ACPI / scan: Make namespace scanning and trimming mutually exclusive

["Rafael J. Wysocki" <rjw@sisk.pl>]

On Saturday, February 02, 2013 11:58:41 AM Steven Newbury wrote:
> On Sat, 2013-01-26 at 15:19 -0800, Yinghai Lu wrote:
> > On Sat, Jan 26, 2013 at 2:41 PM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> > > From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> > >
> > > There is no guarantee that acpi_bus_scan() and acpi_bus_trim() will
> > > not be run in parallel for the same scope of the ACPI namespace,
> > > which may lead to a great deal of confusion, so introduce a new mutex
> > > to prevent that from happening.
> > >
> > > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> > 
> > Acked-by: Yinghai Lu <yinghai@kernel.org>
> > 
> > Steven,
> > 
> > Can you apply this one to for-pci-res-alloc to check if racing with
> > docking hotplug/eject
> > still happen?
> > or wait one or two days after i rebase that branch.
> 
> Tried merging with linux-pm/bleeding-edge, same behaviour:
> 
> [ 3589.013578] ACPI: \_SB_.PCI0.PCIE.GDCK: undocking
> [ 3589.585356] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=none,decodes=io+mem:owns=none
> [ 3589.585422] ACPI: Delete PCI Interrupt Routing Table for 0000:04
> [ 3589.585426] pci 0000:03:08.0: Oops, 'acpi_handle' corrupt
> [ 3589.585446] pci_bus 0000:04: busn_res: [bus 04] is released
> 
> 03:08.0 PCI bridge: PLX Technology, Inc. PEX8112 x1 Lane PCI
> Express-to-PCI Bridge (rev aa)
> 04:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI
> Manhattan [Mobility Radeon HD 5430 Series]
> 04:00.1 Audio device: Advanced Micro Devices [AMD] nee ATI Cedar HDMI
> Audio [Radeon HD 5400/6300 Series]

That's because of a bug in the dock code I believe.

If you're willing to test patches, I can try to cook up something to debug/fix
this.

Thanks,
Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.