linux-kernel - Re: [PATCH v3, part1 07/10] PCI, unicore, m68k: remove redundant call of pci_bus_add

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Date:	Thu, 06 Jun 2013 16:54:17 +1000
From:	Greg Ungerer <gerg@...inux.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	Jiang Liu <liuj97@...il.com>, Yinghai Lu <yinghai@...nel.org>,
	Jiang Liu <jiang.liu@...wei.com>,
	"Rafael J . Wysocki" <rjw@...k.pl>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Gu Zheng <guz.fnst@...fujitsu.com>,
	Toshi Kani <toshi.kani@...com>,
	Myron Stowe <myron.stowe@...hat.com>,
	Yijing Wang <wangyijing@...wei.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	linux-m68k@...ts.linux-m68k.org, Guan Xuetao <gxt@...c.pku.edu.cn>
Subject: Re: [PATCH v3, part1 07/10] PCI, unicore, m68k: remove redundant
 call of pci_bus_add_devices()

Hi Bjorn,

On 06/06/13 07:31, Bjorn Helgaas wrote:
> [+cc m68k and unicore32 maintainers]
> 
> On Sat, May 25, 2013 at 7:48 AM, Jiang Liu <liuj97@...il.com> wrote:
>> pci_scan_bus() and pci_scan_root_bus() has called pci_bus_add_devices()
>> once, so remove the redundant call of pci_bus_add_devices().
>> On the other handle, subsys_init() callbacks will be invoked before
>> device_init() callbacks, so it should be safe to remove the redundant
>> calls.
>>
>> Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
>> ---
>>  arch/m68k/platform/coldfire/pci.c | 2 +-
>>  arch/unicore32/kernel/pci.c       | 5 -----
>>  2 files changed, 1 insertion(+), 6 deletions(-)
> 
> m68k and unicore32 guys:
> 
> I plan to apply the patch below.  I actually split it into two, one
> for m68k and another for unicore32.  If you object or would rather
> push it through your trees, let me know.  I don't think the rest of
> the series has any actual dependency on this, so there shouldn't be
> any problem if you want to take it yourselves.

I have no objection for m68k, feel free to push it through your tree.
I can't test the change in a board that has a PCI card in it right at
the moment, but otherwise:

Acked-by: Greg Ungerer <gerg@...inux.org>

Regards
Greg


> Bjorn
> 
>> diff --git a/arch/m68k/platform/coldfire/pci.c b/arch/m68k/platform/coldfire/pci.c
>> index 8572246..2345972 100644
>> --- a/arch/m68k/platform/coldfire/pci.c
>> +++ b/arch/m68k/platform/coldfire/pci.c
>> @@ -320,7 +320,7 @@ static int __init mcf_pci_init(void)
>>         pci_bus_size_bridges(rootbus);
>>         pci_bus_assign_resources(rootbus);
>>         pci_enable_bridges(rootbus);
>> -       pci_bus_add_devices(rootbus);
>> +
>>         return 0;
>>  }
>>
>> diff --git a/arch/unicore32/kernel/pci.c b/arch/unicore32/kernel/pci.c
>> index ef69c0c..374a055 100644
>> --- a/arch/unicore32/kernel/pci.c
>> +++ b/arch/unicore32/kernel/pci.c
>> @@ -277,11 +277,6 @@ static int __init pci_common_init(void)
>>                 pci_bus_assign_resources(puv3_bus);
>>         }
>>
>> -       /*
>> -        * Tell drivers about devices found.
>> -        */
>> -       pci_bus_add_devices(puv3_bus);
>> -
>>         return 0;
>>  }
>>  subsys_initcall(pci_common_init);
>> --
>> 1.8.1.2
>>
> --
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