linux-kernel - Re: [PATCH] uio_pci_generic does not export memory resources

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Message-ID: <20120608163950.GA3344@redhat.com>
Date:	Fri, 8 Jun 2012 19:39:51 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Dominic Eschweiler <eschweiler@...s.uni-frankfurt.de>
Cc:	"Hans J. Koch" <hjk@...sjkoch.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] uio_pci_generic does not export memory resources

On Fri, Jun 08, 2012 at 06:23:19PM +0200, Dominic Eschweiler wrote:
> Am Freitag, den 08.06.2012, 17:57 +0200 schrieb Hans J. Koch:
> > What problem do you have with this approach?
> 
> Nothing itself. There is obviously a documentation issue, which really
> confuses people who are new to that stuff. I thought that fixing it, by
> just adding a view lines of code (really a view, when I remove the DMA
> masque part) might enhance this particular module. 
> 
> Anyway, what is wrong when the uio_pci_generic module works like
> described in the related documentation? 

Documentation says this:

	Userspace driver can use pci sysfs interface, or the
	libpci libray that wraps it, to talk to the device and to
	re-enable interrupts by writing to the command register.

maybe we should make the point that *all* interaction with
the device should be done via sysfs, explicit.

> -- 
> Gruß
>   Dominic
> 
> Frankfurt Institute for Advanced Studies (FIAS)
> Ruth-Moufang-Straße 1
> D-60438 Frankfurt am Main
> Germany
> 
> Phone:  +49 (0)
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