linux-kernel - Re: [RFC][PATCH 2/2] disable boot interrupts on Intel X58 and 55x0

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Date:	Sat, 05 Sep 2009 11:07:59 +0200
From:	Stefan Assmann <sassmann@...hat.com>
To:	Daniel Walker <dwalker@...o99.com>
CC:	linux-kernel@...r.kernel.org, jcm@...hat.com, sdietrich@...ell.com,
	linux-acpi@...r.kernel.org, andi@...stfloor.org, hpa@...or.com,
	mingo@...e.hu, Olaf.Dabrunz@....net, ktokunag@...hat.com,
	tglx@...utronix.de, lenb@...nel.org
Subject: Re: [RFC][PATCH 2/2] disable boot interrupts on Intel X58 and 55x0

On 04.09.2009 19:06, Daniel Walker wrote:
> On Fri, 2009-09-04 at 12:55 -0400, Stefan Assmann wrote:
>> + * Disable boot interrupts on Intel X58, 55x0 (Tylersburg).
>> + * See Intel document #321328-001, section 19.10.2.27.
>> + * (Disable PCI INTx Routing to ICH)
>> + */
>> +#define INTEL_X58_55x0_QPIPINTRC_OFFSET        0xe0
>> +#define INTEL_X58_55x0_QPIPINTRC_BIT   (1<<25)
>> +static void quirk_disable_intel_tylersburg_boot_interrupt(struct
>> pci_dev *dev)
>> +{
>> +       u32 pci_config_dword;
>> +
>> +       if (noioapicquirk)
>> +               return;
>> +
>> +       pci_read_config_dword(dev, INTEL_X58_55x0_QPIPINTRC_OFFSET,
>> &pci_config_dword);
>> +       pci_config_dword |= INTEL_X58_55x0_QPIPINTRC_BIT;
>> +       pci_write_config_dword(dev, INTEL_X58_55x0_QPIPINTRC_OFFSET,
>> pci_config_dword);
>> +
>> +       printk(KERN_INFO "disabled boot interrupt on device 0x%04x:0x%
>> 04x\n",
>> +               dev->vendor, dev->device);
>> +}
>> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_QPI_TBG15,  quirk_disable_intel_tylersburg_boot_interrupt);
>> +DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,  PCI_DEVICE_ID_INTEL_QPI_TBG15,  quirk_disable_intel_tylersburg_boot_interrupt);
> 
> 
> These lines are wildly long .. Could you reduce these down to a max of
> 80 characters..

Hi Daniel,

you're right about the lines being to long, however if you take a peek
at drivers/pci/quirks.c you'll see that all the quirks are done this
way. :)

  Stefan
--
Stefan Assmann         | Red Hat GmbH
Software Engineer      | Otto-Hahn-Strasse 20, 85609 Dornach
                       | HR: Amtsgericht Muenchen HRB 153243
                       | GF: Brendan Lane, Charlie Peters,
sassmann at redhat.com |     Michael Cunningham, Charles Cachera
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