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

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Message-ID: <3585743.RAy43NB8MZ@vostro.rjw.lan>
Date:	Mon, 10 Dec 2012 23:47:27 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Yinghai Lu <yinghai@...nel.org>
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 Monday, December 10, 2012 09:07:06 AM Yinghai Lu wrote:
> 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.

OK, I'll take a look.  Any pointers to speed that up?

> also BUS_ADD_MATCH and BUS_ADD_START are duplicated.

Not at the moment, they do different things as code goes.

> 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.

Yes, I'm going to do that as the next step.  I didn't want this particular
patchset to grow too big.  I'll post another one on top of it if people
don't have problems with this one.

Thanks,
Rafael


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