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

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Message-ID: <8119513.v7VrlzcaZC@vostro.rjw.lan>
Date:	Tue, 11 Dec 2012 02:28:04 +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 Tuesday, December 11, 2012 02:02:14 AM Rafael J. Wysocki wrote:
> On Monday, December 10, 2012 03:14:32 PM Yinghai Lu wrote:
> > On Mon, Dec 10, 2012 at 3:09 PM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> > > On Monday, December 10, 2012 11:47:27 PM Rafael J. Wysocki wrote:
> > >> 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.
> > >
> > > By the way, can you please remind me where you wanted to put the
> > > pci_bus_add_devices() and why?
> > >
> > 
> > please check my for-pci-next branch at
> > http://git.kernel.org/?p=linux/kernel/git/yinghai/linux-yinghai.git;a=shortlog;h=refs/heads/for-pci-next
> > 
> > that includes delay loading acpi driver and pci driver.
> > 
> > http://git.kernel.org/?p=linux/kernel/git/yinghai/linux-yinghai.git;a=commitdiff;h=8c031eabbdc83dd4d93933b82d96b55d038bcb64
> >  PCI: prepare to use device drivers_autoprobe to delay attach drivers
> > 
> > http://git.kernel.org/?p=linux/kernel/git/yinghai/linux-yinghai.git;a=commitdiff;h=40a12dc8942a8ed02bfbf75ee1ffbfbdf1511b45
> > PCI: Use device_add for device and bus early
> > 
> > http://git.kernel.org/?p=linux/kernel/git/yinghai/linux-yinghai.git;a=commitdiff;h=8af9b4c250091c30afedeb2e7f14fca06997c811
> > ACPI: add drivers_autoprobe in struct acpi_device
> > 
> > http://git.kernel.org/?p=linux/kernel/git/yinghai/linux-yinghai.git;a=commitdiff;h=ae498e157e9dc8794932562b2f885ddc3a1a229a
> >  ACPI: use device drivers_autoprobe to delay loading acpi drivers
> > 
> > http://git.kernel.org/?p=linux/kernel/git/yinghai/linux-yinghai.git;a=commitdiff;h=6bee785b563a0b0e311e188321b1160593d5e6ee
> >  PCI, ACPI: Remove not used acpi_pci_root_start()
> > 
> > http://git.kernel.org/?p=linux/kernel/git/yinghai/linux-yinghai.git;a=commitdiff;h=f467a1cd18a07a250be8527b94612fd4a654fbd1
> > ACPI: remove acpi_op_start workaround
> 
> OK, thanks for the pointers.  I actually see more differences between our
> patchsets.  For one example, you seem to have left the parent->ops.bind()
> stuff in acpi_add_single_object() which calls it even drivers_autoprobe is
> set.

Sorry, that should have been "which calls it even when drivers_autoprobe is
not set".  I need to be more careful.


> Is that the case, or am I missing anything?

Thanks,
Rafael


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