linux-kernel - Re: [PATCH v8 10/30] PCI: Introduce pci_host_bridge

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Message-ID: <5514C101.8070705@huawei.com>
Date:	Fri, 27 Mar 2015 10:31:29 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Marc Zyngier <marc.zyngier@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	the arch/x86 maintainers <x86@...nel.org>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Tony Luck <tony.luck@...el.com>,
	"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	"Guan Xuetao" <gxt@...c.pku.edu.cn>, <linux-alpha@...r.kernel.org>,
	<linux-m68k@...ts.linux-m68k.org>, Liviu Dudau <liviu@...au.co.uk>,
	"Arnd Bergmann" <arnd@...db.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [PATCH v8 10/30] PCI: Introduce pci_host_bridge_list to manage
 host bridges

On 2015/3/27 0:31, Yinghai Lu wrote:
> On Mon, Mar 23, 2015 at 8:34 PM, Yijing Wang <wangyijing@...wei.com> wrote:
>> Introduce pci_host_bridge_list to manage pci host
>> bridges in system, this make us have the ability
>> to check whether the new host would conflict with
>> existing one. Then we could remove bus alreay exist
>> check in __pci_create_root_bus().
> 
> Can we use bus_type instead?
> Then we can use bus_find_device for the host_bridge enumeration.
> 
> Please refer the patches that I sent out couple years ago.

HI Yinghai,
   I think your changes is good, but in this series, we only iterate the pci_host_bridge
in drivers/pci/host-bridge.c. The simple list is enough, of course, if we want to export
this list and support to host bridge hotplug, we must need a new iteration for host bridge,
and your series looks good to me, I read your series history, found Bjorn comment a lot.

So I think Bjorn may have some comments for this.

Thanks!
Yijing.




-- 
Thanks!
Yijing

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