linux-kernel - Re: [PATCH] SCSI: Add the SGPIO support for sata

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Message-Id: <200610311337.27495.prakash@punnoor.de>
Date:	Tue, 31 Oct 2006 13:37:27 +0100
From:	Prakash Punnoor <prakash@...noor.de>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Peer Chen <pchen@...dia.com>, jeff@...zik.org,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	Kuan Luo <kluo@...dia.com>
Subject: Re: [PATCH] SCSI: Add the SGPIO support for sata_nv.c

Am Dienstag 31 Oktober 2006 11:40 schrieb Christoph Hellwig:
> On Tue, Oct 31, 2006 at 04:43:19PM +0800, Peer Chen wrote:
> > +	u32 cb_add, temp32;
> > +	struct device *dev = pci_dev_to_dev(pdev);
> > +	struct ata_host_set *host_set = dev_get_drvdata(dev);
> > +	u8 pro=0;
> > +	if (!(pro&0x40))
> > +		return;
> > +
> > +	temp32 = csr_add;
> > +	phost->host_sgpio.pcsr = (void *)temp32;
> > +	phost->host_sgpio.pcb = phys_to_virt(cb_add);
>
> Use of phys_to_virt is generally a bug.  What are you trying to do here?

I am also wondering whether casting of temp32 to a pointer is very 64bit 
friendly? At least my compiler on x86_64 gives a warning...

I also found 

http://lkml.org/lkml/2006/8/21/324

which looks alike at first glance and it seems NVidia didn't really fix what 
Andrew Morton told them to do so...

Cheers,
-- 
(°=                 =°)
//\ Prakash Punnoor /\\
V_/                 \_V

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