linux-kernel - Re: [PATCH v2] irq: add quirk for broken interrupt remapping on 55XX chipsets

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Date:	Thu, 4 Apr 2013 08:57:06 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Neil Horman <nhorman@...driver.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	Prarit Bhargava <prarit@...hat.com>,
	Don Zickus <dzickus@...hat.com>,
	Jiang Liu <jiang.liu@...wei.com>,
	Asit Mallick <asit.k.mallick@...el.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	iommu@...ts.linux-foundation.org, Yinghai Lu <yinghai@...nel.org>
Subject: Re: [PATCH v2] irq: add quirk for broken interrupt remapping on 55XX chipsets

On Thu, Apr 4, 2013 at 8:50 AM, Neil Horman <nhorman@...driver.com> wrote:
> On Thu, Apr 04, 2013 at 03:27:29PM +0100, David Woodhouse wrote:
>> On Wed, 2013-04-03 at 17:53 -0600, Bjorn Helgaas wrote:
>> > );
>> > > +
>> > > +       if ((revision == 0x13) && irq_remapping_enabled) {
>> > > +                pr_warn(HW_ERR "This system BIOS has enabled interrupt remapping\n"
>> > > +                        "on a chipset that contains an errata making that\n"
>> > > +                        "feature unstable.  Please reboot with nointremap\n"
>> > > +                        "added to the kernel command line and contact\n"
>> > > +                        "your BIOS vendor for an update");
>>
>> This should be WARN_TAINT(TAINT_FIRMWARE_WORKAROUND). And 'an erratum'.
>>
> Ok, copy that. I'll repost shortly

When you do, please include URLs for any problem reports or bugzillas you have.

I assume Windows "just works" in this situation?
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