linux-kernel - Re: [PATCH v4 02/13] libata: bind the Linux device tree to the ACPI device tree

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Date:	Wed, 13 Jun 2012 16:03:23 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Jeff Garzik <jgarzik@...ox.com>,
	David Woodhouse <David.Woodhouse@...el.com>,
	Aaron Lu <aaron.lu@....com>, Holger Macht <holger@...ac.de>,
	Matthew Garrett <mjg@...hat.com>, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-ide@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH v4 02/13] libata: bind the Linux device tree to the ACPI
 device tree

On Mon, May 28, 2012 at 5:51 PM, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
>> +static int is_pci_ata(struct device *dev)
>> +{
>> +     struct pci_dev *pdev;
>> +
>> +     if (!is_pci_dev(dev))
>> +             return 0;
>> +
>> +     pdev = to_pci_dev(dev);
>> +
>> +     if ((pdev->class >> 8) != PCI_CLASS_STORAGE_SATA &&
>> +         (pdev->class >> 8) != PCI_CLASS_STORAGE_IDE)
>> +             return 0;
>
> This needs a better name. It doesn't check if a device is PCI ATA or
> anything of the sort, it checks if its probably a device in compatibility
> mode. A lot of controllers will in fact report RAID class or similar in
> native mode.

How about compat_pci_ata?

>
> Alan
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