linux-kernel - [PATCH v2 0/13] ACPI / hotplug / PCI: Updates on top of changes merged recently

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Date:	Sun, 02 Feb 2014 01:19:33 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>, Aaron Lu <aaron.lu@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux PCI <linux-pci@...r.kernel.org>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: [PATCH v2 0/13] ACPI / hotplug / PCI: Updates on top of changes merged recently

On Monday, January 27, 2014 01:37:17 AM Rafael J. Wysocki wrote:
> Hi All,
> 
> ACPIPHP can be simplified a bit on top of some PCI and ACPI changes merged
> recently and the following series of patches implements those simplifications:
> 
> [1/11] Fix up two kerneldoc comments in acpiphp_glue.c.
> [2/11] Get rid of an unnecessary label in register_slot().
> [3/11] Drop acpiphp_bus_trim() and use acpi_bus_trim() instead of it directly.
> [4/11] Move the acpi_bus_get_device() call out of acpiphp_no_hotplug().
> [5/11] Store struct acpi_device pointers instead of ACPI handles in struct acpiphp_context.
> [6/11] Drop acpiphp_bus_add() (which has only one user).
> [7/11] Drop crit_sect mutexes (that are redundant).
> [8/11] Clean up the usage of the slot variable in hotplug_event().
> [9/11] Drop dev_in_slot() and rework disable_slot() to walk bus->devices directly.
> [10/11] Use acpi_handle_debug() in hotplug_event() instead of open-coded stuff.
> [11/11] Drop handle argument from the member functions of struct acpi_dock_ops.
> 
> All of that is relateively straightforward, but I have some more intrusive changes
> on top of it in the works.  They will be posted separately later this week.

I've learned a couple of things since I sent this patchset.  First, all
bus->devices list walks that may remove PCI devices should be done in reverse
order or they can crash if virtual functions are involved.  Second, hotplug_event()
(in acpiphp_glue.c) has to acquire pci_rescan_remove_lock by itself, because it
may be called from multiple places and all of them need that lock to be held.
That is done by patches [1-2/13] which I'm planning to push as fixes for 3.14-rc2.

The rest is pretty much the same as last time except that the old patch [9/11]
became [3/13] in this series and it has been changed so that the list is walked in
reverse order.

Thanks!

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