linux-kernel - Re: [PATCH v2 5/9] ACPI/pci-bind: remove bind/unbind callbacks from acpi_device

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Message-ID: <50573232.9080508@gmail.com>
Date:	Mon, 17 Sep 2012 22:22:42 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Bjorn Helgaas <bhelgaas@...gle.com>, Len Brown <lenb@...nel.org>,
	Tony Luck <tony.luck@...el.com>,
	Jiang Liu <jiang.liu@...wei.com>,
	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	Yijing Wang <wangyijing@...wei.com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-acpi@...r.kernel.org
Subject: Re: [PATCH v2 5/9] ACPI/pci-bind: remove bind/unbind callbacks from
 acpi_device_ops

On 09/17/2012 11:03 AM, Yinghai Lu wrote:
> On Sat, Sep 15, 2012 at 4:27 PM, Yinghai Lu <yinghai@...nel.org> wrote:
>> On Fri, Sep 14, 2012 at 8:05 PM, Jiang Liu <liuj97@...il.com> wrote:
>>>  From: Jiang Liu <jiang.liu@...wei.com>
>>>
>>> Now ACPI devices are created before/destroyed after corresponding PCI
>>> devices, and acpi_platform_notify/acpi_platform_notify_remove will
>>> update PCI<->ACPI binding relationship when creating/destroying PCI
>>> devices, there's no need to invoke bind/unbind callbacks from ACPI
>>> device probe/destroy routines anymore. So remove bind/unbind callbacks
>>> from acpi_device_ops.
>> for pci root bus, acpi_bus_trim() is used to remove acpi_device.
>>
>> and later in acpi_pci_root_remove to stop pci drivers/ioapic driver,
>> iommu driver then remove pci devices.
>>
>> if call back is removed there, then could some functions in
>> acpi_pci_unbind() will be skipped.
>>
>> I really do not want to add pci_stop_bus_devices() in
>> pci_root_hp.c::handle_root_bridge_removal before
>> calling acpi_bus_trim...
> 
> FYI, I solved the problem.  will call apci_bus_remove() two times. it
> will make sure pci devices
> get removed at first before acpi devices...
Hi Yinghai,
	Great! So we could remove the acpi<->PCI logic now.
	Thanks!
	Gerry

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