linux-kernel - Re: [PATCH 7/16 v6] PCI: cleanup pcibios_allocate

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Date:	Thu, 23 Oct 2008 00:10:26 -0700
From:	"Yinghai Lu" <yinghai@...nel.org>
To:	"Yu Zhao" <yu.zhao@...el.com>
Cc:	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"achiang@...com" <achiang@...com>,
	"grundler@...isc-linux.org" <grundler@...isc-linux.org>,
	"greg@...ah.com" <greg@...ah.com>, "mingo@...e.hu" <mingo@...e.hu>,
	"jbarnes@...tuousgeek.org" <jbarnes@...tuousgeek.org>,
	"matthew@....cx" <matthew@....cx>,
	"randy.dunlap@...cle.com" <randy.dunlap@...cle.com>,
	"rdreier@...co.com" <rdreier@...co.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH 7/16 v6] PCI: cleanup pcibios_allocate_resources()

On Wed, Oct 22, 2008 at 1:42 AM, Yu Zhao <yu.zhao@...el.com> wrote:
> This cleanup makes pcibios_allocate_resources() easier to read.
>
> Cc: Alex Chiang <achiang@...com>
> Cc: Grant Grundler <grundler@...isc-linux.org>
> Cc: Greg KH <greg@...ah.com>
> Cc: Ingo Molnar <mingo@...e.hu>
> Cc: Jesse Barnes <jbarnes@...tuousgeek.org>
> Cc: Matthew Wilcox <matthew@....cx>
> Cc: Randy Dunlap <randy.dunlap@...cle.com>
> Cc: Roland Dreier <rdreier@...co.com>
> Signed-off-by: Yu Zhao <yu.zhao@...el.com>
>
> ---
>  arch/x86/pci/i386.c |   28 ++++++++++++++--------------
>  1 files changed, 14 insertions(+), 14 deletions(-)
>
> diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
> index 844df0c..8729bde 100644
> --- a/arch/x86/pci/i386.c
> +++ b/arch/x86/pci/i386.c
> @@ -147,7 +147,7 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
>  static void __init pcibios_allocate_resources(int pass)
>  {
>        struct pci_dev *dev = NULL;
> -       int idx, disabled;
> +       int idx, enabled;
>        u16 command;
>        struct resource *r, *pr;
>
> @@ -160,22 +160,22 @@ static void __init pcibios_allocate_resources(int pass)
>                        if (!r->start)          /* Address not assigned at all */
>                                continue;
>                        if (r->flags & IORESOURCE_IO)
> -                               disabled = !(command & PCI_COMMAND_IO);
> +                               enabled = command & PCI_COMMAND_IO;
>                        else
> -                               disabled = !(command & PCI_COMMAND_MEMORY);
> -                       if (pass == disabled) {
> -                               dev_dbg(&dev->dev, "resource %#08llx-%#08llx (f=%lx, d=%d, p=%d)\n",
> +                               enabled = command & PCI_COMMAND_MEMORY;
> +                       if (pass == enabled)
> +                               continue;

it seems you change the flow here for MMIO
because PCI_COMMAND_MEMORY is 2.

YH
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