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

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Message-ID: <CAE9FiQXsBC-CY4KqKkaAXx3sYLVWJOaaKGkg_kChb7ry_7Sq8Q@mail.gmail.com>
Date:	Mon, 10 Dec 2012 09:07:06 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	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

On Mon, Dec 10, 2012 at 6:46 AM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> On Sunday, December 09, 2012 09:34:42 PM Yinghai Lu wrote:
>>
>> Can we expand the BUS_ADD_* concept to other devices instead of just
>> acpi_device?
>>
>> aka we should let struct device has this add_type field.
>
> Having done that in ACPI to cover our use case here, we can try to move it
> into struct device if there are use cases beyond ACPI that can't be covered
> by using deferred driver probing.

pci device for hotplug have same problem. need to delay driver attach
for them too.

also BUS_ADD_MATCH and BUS_ADD_START are duplicated.

old add are separated to adding all devices to tree and then matching
work to load the drivers.

so _START is not needed anymore, only user.start in pci_root driver
should be removed.
code in .start could be moved .add without problem.
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