linux-kernel - Re: [PATCH] PCI legacy resource fix

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Message-Id: <1165679440.7443.416.camel@gullible>
Date:	Sat, 09 Dec 2006 10:50:40 -0500
From:	Ben Collins <ben.collins@...ntu.com>
To:	Alan <alan@...rguk.ukuu.org.uk>
Cc:	Ralf Baechle <ralf@...ux-mips.org>, Andrew Morton <akpm@...l.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI legacy resource fix

On Sat, 2006-12-09 at 13:14 +0000, Alan wrote:
> On Sat, 09 Dec 2006 03:12:11 -0500
> Ben Collins <ben.collins@...ntu.com> wrote:
> > My controller is in legacy mode, however, it never gets to here because
> > of this call, just before this block of code:
> > 
> >         rc = pci_request_regions(pdev, DRV_NAME);
> >         if (rc) {
> >                 disable_dev_on_err = 0;
> >                 goto err_out;
> >         }
> 
> Then you don't have the fix applied that was posted. That code is not
> present in the form you pasted in the fixed version of the libata code.
> It is within an if (!legacy_mode)

I didn't see that patch until you mentioned it. Even still, there seems
to be one thing missing. I suspect you still want to take the bmdma
resource since both native and legacy use it. With the patch you
mentioned, that resource wont be requested in legacy mode.

Also, I did my patch as detailed as it is because of this line:

	/* TODO: What if one channel is in native mode ... */

If that's never going to be the case then the comment should go. If it
is possible, then my patch makes this work. The way things are now, it
will ignore a native mode port if it is sitting on the same controller
as a legacy mode one.

Want to re-evaluate the patch based on this info?
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