linux-kernel - Re: [PATCH 2/2] vga: drops a documentation regarding the VGA arbiter

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Date:	Sun, 19 Jul 2009 21:50:38 +0300
From:	"Vignatti Tiago (Nokia-D/Helsinki)" <tiago.vignatti@...ia.com>
To:	ext Pavel Machek <pavel@....cz>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Dave Airlie <airlied@...hat.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] vga: drops a documentation regarding the VGA
	arbiter


On Sat, Jul 18, 2009 at 01:48:17PM +0200, ext Pavel Machek wrote:
> 
> > +I. Details and Theory of Operation
> > +==================================
> > +
> > +I.1 vgaarb
> > +----------
> > +
> > +The vgaarb is a module of the Linux Kernel. When it is initially loaded, it
> > +scans all PCI devices and add the VGA ones inside the arbitration. The arbiter
> 
> and adds?
> 
> 
> > +If the device is hot-{un,}plugged, there is a hook inside the module to notify
> > +them being added/removed in the system and automatically added/removed in
> > +the arbiter.
> 
> I don't see who's 'them' here.
> 
> > +I.2 libpciaccess
> > +----------------
> > +
> > +To use the vga arbiter char device it was implemented a serie of functions
> 
> series?
> 
> > +inside the pciaccess library. Two fields were added to struct pci_device for
> > +this be possible:
> > +
> > +    /* the type of resource decoded by the device */
> > +    int vgaarb_rsrc;
> > +    /* the file descriptor (/dev/vga_arbiter) */
> > +    int vgaarb_fd;
> > +
> > +
> > +and the functions:
> > +
> 
> What functions?

Thanks for the review. I already updated the documentation here with your
comments.


Cheers,
            Tiago
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