linux-kernel - Re: [RFT][PATCH] PCI / ACPI: Do not require MSI support for PCIe native features

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Message-ID: <AANLkTim39fjrAp4OW_MfpbZkz-YYW5E2NOHuo1j=svmW@mail.gmail.com>
Date:	Wed, 16 Mar 2011 22:23:32 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	linux-pci@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	ACPI Devel Mailing List <linux-acpi@...r.kernel.org>,
	Len Brown <lenb@...nel.org>,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: [RFT][PATCH] PCI / ACPI: Do not require MSI support for PCIe
 native features

2011/3/16 Rafael J. Wysocki <rjw@...k.pl>:
> On Tuesday, March 15, 2011, Sarah Sharp wrote:
>> On Tue, Mar 15, 2011 at 01:00:17AM +0100, Rafael J. Wysocki wrote:
>> > Well, I must admit I have no idea what the problem is.  OK, in addition to the
>> > above changes, please replace the "pci_ext_cfg_avail(root->bus->self)" in the
>> > same file with "true" and see if _that_ helps.
>>
>> Yay, that worked!  dmesg is attached.
>
> Good, at least we know what the problem is, now we only have to find the root
> cause. ;-)
>
> So, pci_ext_cfg_avail(root->bus->self) returns 0 on your machine, which is kind
> of unexpected (to put it lightly), so very likely we have uncovered a bug
> in the init code.
>
> Unfortunately, I may not be able to take care of this issue for the next few
> days, I'll let you know when I get back to it.

her .config does not define PCI_MMCONFIG

#
# Bus options (PCI etc.)
#
CONFIG_PCI=y
CONFIG_PCI_DIRECT=y
# CONFIG_PCI_MMCONFIG is not set

Yinghai
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