linux-kernel - Re: [PATCH 5/6] ACPI: Replace struct acpi_bus

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Date:	Wed, 12 Dec 2012 22:34:48 +0800
From:	Yijing Wang <wangyijing0307@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Jiang Liu <liuj97@...il.com>, Yinghai Lu <yinghai@...nel.org>,
	Jiang Liu <jiang.liu@...wei.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	linux-pci@...r.kernel.org, Toshi Kani <toshi.kani@...com>,
	Myron Stowe <myron.stowe@...hat.com>
Subject: Re: [PATCH 5/6] ACPI: Replace struct acpi_bus_ops with enum type

于 2012-12-12 2:30, Rafael J. Wysocki 写道:
> Hi Gerry,
> 
> On Tuesday, December 11, 2012 11:09:06 PM Jiang Liu wrote:
>> Hi Rafael,
>> 	I have worked out a patch set to clean up ACPI/PCI related notifications,
>> please refer to
>> http://www.spinics.net/lists/linux-pci/msg17822.html
>> 	The patchset doesn't apply cleanly to Bjorn's latest pci-next tree. I will
>> help to rebase it if needed.
> 
> I have reviewed the patches and I think they make sense overall.  However,
> the statement that acpi_pci_bind()/acpi_pci_unbind() are used to maintain
> PCI-ACPI binding relationships is quite inaccurate, because all what these
> functions do is to (1) add/remove ACPI PM notifiers to/from PCI devices and
> (2) retrieve the _PRT information for bridges from ACPI tables.  In fact,
> the *binding* itself is managed by the code in drivers/acpi/glue.c.
> 
> Also, please have a look at my suggestion in the last reply to Yinghai:
> 
> http://marc.info/?l=linux-pci&m=135522965707752&w=2
> 
> In fact, I think we can go even further than that.  Namely, if we populate the
> ACPI handle of the device in pci_scan_device(), then we can just move the PM
> notifier and wakeup setup to platform_pci_wakeup_init(), where it should be
> (we'll also need to add a corresponding _exit() function, then, but that'll be
> much cleaner anyway).
> 
> Then, the remaining thing would be to ensure that _PRT entries are parsed
> as appropriate somewhere around pci_init_capabilities().
> 
> Also, I wonder if you can help test the $subject patchset on a system with
> hardware PCI hotplug (preferably on top of the linux-pm.git/master branch)?
> 
Hi Rafael,
   We are doing test for this series patches, I will send out the test result as soon.

Thanks!
Yijing



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