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Message-ID: <20070824161442.GB15305@kroah.com>
Date:	Fri, 24 Aug 2007 09:14:42 -0700
From:	Greg KH <greg@...ah.com>
To:	Yoichi Yuasa <yoichi_yuasa@...peaks.co.jp>
Cc:	Jeff Garzik <jeff@...zik.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org, Martin Michlmayr <tbm@...ius.com>
Subject: Re: [PATCH][resend] fix IDE legacy mode resources

On Fri, Aug 24, 2007 at 11:55:59AM +0900, Yoichi Yuasa wrote:
> Hi,
> 
> I got the following error on MIPS Cobalt.
> 
> PCI: Unable to reserve I/O region #1:8@...001f0 for device 0000:00:09.1
> pata_via 0000:00:09.1: failed to request/iomap BARs for port 0 (errno=-16)
> PCI: Unable to reserve I/O region #3:8@...00170 for device 0000:00:09.1
> pata_via 0000:00:09.1: failed to request/iomap BARs for port 1 (errno=-16)
> pata_via 0000:00:09.1: no available native port
> 
> The legacy mode IDE resources set the following order. 
> 
> pci_setup_device()
>     Legacy mode ATA controllers have fixed addresses.
>     IDE resources: 0x1F0-0x1F7, 0x3F6, 0x170-0x177, 0x376
>     |
>     V
> pcibios_fixup_bus()
>     MIPS Cobalt PCI bus regions have the -0x10000000 offset from PCI resources.
>     pcibios_fixup_bus() fix PCI bus regions.
>     0x1F0 - 0x10000000 = 0xF00001F0
>     |
>     V
> ata_pci_init_one()
>     PCI: Unable to reserve I/O region #1:8@...001f0 for device 0000:00:09.1
> 
> In some architectures, PCI bus regions have the offset from PCI resources.
> For this reason, pci_setup_device() should set PCI bus regions to dev->resource[]. 

I thought this patch was rejected in the past as it broke other
machines.

thanks,

greg k-h
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