linux-kernel - Re: [PATCH 0/6] Thunderbolt workarounds take 2

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Date:	Wed, 26 Jun 2013 01:24:25 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Yinghai Lu <yinghai@...nel.org>, john.ronciak@...el.com,
	miles.j.penner@...el.com, bruce.w.allan@...el.com,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	x86@...nel.org
Subject: Re: [PATCH 0/6] Thunderbolt workarounds take 2

On Tuesday, June 25, 2013 07:22:04 PM Mika Westerberg wrote:
> Hi all,
> 
> This is the second iteration of the patches first posted here quite a while
> ago:
> 
> 	https://lkml.org/lkml/2012/12/13/589
> 
> With Thunderbolt devices we might see pretty complex PCIe hierarchies that
> the current ACPI hotplug code was not able to handle properly but instead
> failed to scan the whole hierarchy. This series tries to address these
> problems. In addition to that there's a possibility that only part of the
> chain is disconnected so we don't want to leave behind stale PCI devices.
> 
> We have tested this on Acer Aspire S5 with the largest chain looking like
> this:
> 
>   PC +--+ eSata Hub #0 +--+ eSata Hub #1 +--+ Apple Thunderbolt display +--+ Apple ethernet dongle
> 
> There are still problems with different device drivers because of the
> surprise hotplug nature of Thunderbolt, causing occasional hangs and
> failures that should be fixed per-driver later on (not addressed in this
> series).
> 
> Currently Thunderbolt on Apple hardware like Macbooks is not yet supported
> as they use some different mechanism than ACPI events to trigger hotplug
> events.
> 
> The series is based on linux-pm.git/linux-next.
> 
> Kirill A. Shutemov (4):
>   PCI: acpiphp: do not check for SLOT_ENABLED in enable_device()
>   PCI: acpiphp: enable_device(): rescan even if no new devices on slot
>   PCI: introduce pci_trim_stale_devices()
>   PCI: acpiphp: check for new devices on enabled host
> 
> Mika Westerberg (2):
>   PCI: acpiphp: look _RMV method a bit deeper in the hierarhcy
>   x86/PCI: quirk Thunderbolt PCI-to-PCI bridges
> 
>  arch/x86/pci/fixup.c               | 51 ++++++++++++++++++++++++
>  drivers/pci/hotplug/acpi_pcihp.c   | 53 ++++++++++++++++++++++---
>  drivers/pci/hotplug/acpiphp_glue.c | 79 +++++++++++++++++---------------------
>  drivers/pci/remove.c               | 20 ++++++++++
>  include/linux/pci.h                |  1 +
>  5 files changed, 156 insertions(+), 48 deletions(-)

Would you please CC things touching ACPIPHP to linux-acpi?

Rafael

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