linux-kernel - Re: [PATCH 08/28] PCI: Introduce pci_host_assign_domain

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Message-ID: <54BC6894.6060500@huawei.com>
Date:	Mon, 19 Jan 2015 10:14:44 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Arnd Bergmann <arnd@...db.de>,
	<linux-arm-kernel@...ts.infradead.org>
CC:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Liviu Dudau <liviu@...au.co.uk>,
	"Tony Luck" <tony.luck@...el.com>,
	Russell King <linux@....linux.org.uk>,
	"Marc Zyngier" <marc.zyngier@....com>, <linux-pci@...r.kernel.org>,
	<x86@...nel.org>, <linux-kernel@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	<linux-m68k@...ts.linux-m68k.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	<linux-alpha@...r.kernel.org>, <linux-ia64@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Guan Xuetao" <gxt@...c.pku.edu.cn>,
	Yinghai Lu <yinghai@...nel.org>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Subject: Re: [PATCH 08/28] PCI: Introduce pci_host_assign_domain_nr() to assign
 domain

>> I'm confused: the same code is already part of the PCI tree, but with
>> Lorenzo Pieralisi listed as the patch author. The code is good,
>> and I acked it in the past, but one of you is (probably by accident)
>> misattributing the patch.
>>
>> Assuming that the patch that is already merged in next is the right
>> one, I think you should rebase your series on top of
>>
>> git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git#next
>>
>> to avoid conflicts like this one.
>>
> 
> I think I just got confused because the code duplicates most of
> pci_bus_assign_domain_nr(). Maybe this can be done in a better way
> by splitting the existing function into 
> 
> static int pci_assign_domain_nr(struct device *)
> {
> 	... /* most of pci_bus_assign_domain_nr */
> 
> 	return domain;
> }
> 
> void pci_host_assign_domain_nr(struct pci_host_bridge *host)
> {
> 	host->domain = pci_assign_domain_nr(host->dev.parent);
> }
> 
> void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
> {
> 	bus->domain_nr = pci_assign_domain_nr(parent);
> }
> 

Hi Arnd,
   I kept the almost duplicated pci_host_assign_domain_nr() and
pci_bus_assign_domain_nr() here for building happy, because now
platform specific pci_domain_nr() still exists which may get domain
number from pci_bus. pci_bus_assign_domain_nr() will be removed in
the last patch.

Thanks!
Yijing.

> .
> 


-- 
Thanks!
Yijing

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