linux-kernel - Re: GAK!!!! Re: PCI: AMD SATA IDE mode quirk

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Message-ID: <20080222100205.5c86d351@core>
Date:	Fri, 22 Feb 2008 10:02:05 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	torvalds@...l.org, jeff@...zik.org
Subject: Re: GAK!!!! Re: PCI: AMD SATA IDE mode quirk

On Fri, 22 Feb 2008 09:48:28 +0000
Alan Cox <alan@...rguk.ukuu.org.uk> wrote:

> >     Signed-off-by: Crane Cai <crane.cai@....com>
> >     Acked-by: Jeff Garzik <jeff@...zik.org>
> >     Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
> 
> Vomitted-upon-by: Alan Cox <alan@...hat.com>
> 
> > -	if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
> > -		u8 tmp;
> > +	/* set sb600/sb700/sb800 sata to ahci mode */
> > +	u8 tmp;
> >  
> > +	pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &tmp);
> > +	if (tmp == 0x01) {
> 
> CLASS_DEVICE is cached in pdev->class so why not simply do:
> 
> 	if (pdev->class & (1 << 8))

or better yet

	((pdev->class & 0xFF00) == 0x0100)

;)
--
Gnome #3319
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