linux-kernel - Re: [PATCH v2] pci: Allow read/write access to sysfs I/O port resources

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Message-ID: <20100723174257.GZ2651@x200.localdomain>
Date:	Fri, 23 Jul 2010 10:42:57 -0700
From:	Chris Wright <chrisw@...hat.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Alex Williamson <alex.williamson@...hat.com>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	chrisw@...hat.com, ddutile@...hat.com, bjorn.helgaas@...com,
	eike-kernel@...tec.de
Subject: Re: [PATCH v2] pci: Allow read/write access to sysfs I/O port
 resources

* Jesse Barnes (jbarnes@...tuousgeek.org) wrote:
> On Fri, 23 Jul 2010 09:10:27 -0600
> Alex Williamson <alex.williamson@...hat.com> wrote:
> 
> > On Mon, 2010-07-19 at 09:45 -0600, Alex Williamson wrote:
> > > PCI sysfs resource files currently only allow mmap'ing.  On x86 this
> > > works fine for memory backed BARs, but doesn't work at all for I/O
> > > port backed BARs.  Add read/write to I/O port PCI sysfs resource
> > > files to allow userspace access to these device regions.
> > > 
> > > Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
> > > ---
> > 
> > Any thoughts on this for -next?  Thanks,
> 
> Yeah, I like it.  Unless there are objections I'll pull it in.

Acked-by: Chris Wright <chrisw@...hat.com>

I think we may have some room for follow-on cleanups so consolidate the
ioport read/write functions w/ other HAVE_PCI_LEGACY bits...

thanks,
-chris
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