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

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Date:	Wed, 5 Jun 2013 15:31:11 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Jiang Liu <liuj97@...il.com>
Cc:	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>,
	Greg Ungerer <gerg@...inux.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()

[+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.

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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