linux-kernel - Re: [PATCH] UIO: Resend: Change driver name of uio

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Message-ID: <20080922203849.GC792@strlen.de>
Date:	Mon, 22 Sep 2008 22:38:49 +0200
From:	Uwe Kleine-König <ukleinek@...len.de>
To:	"Hans J. Koch" <hjk@...utronix.de>
Cc:	Greg KH <gregkh@...e.de>, LKML <linux-kernel@...r.kernel.org>,
	Magnus Damm <damm@...l.co.jp>
Subject: Re: [PATCH] UIO: Resend: Change driver name of uio_pdrv

Hello,

On Mon, Sep 22, 2008 at 10:08:36PM +0200, Hans J. Koch wrote:
> On Fri, Sep 19, 2008 at 09:40:34AM +0200, Uwe Kleine-König wrote:
> > Hello Hans,
> > 
> > [Added Magnus Damm (= author of uio_pdrv_genirq) to Cc:]
Note:  Magnus' address seems to be wrong.  I don't know a working one.

> > > The generic UIO platform device driver should be given a unique driver ID and
> > > not just "uio". This is especially important since we now have a similar driver
> > > named uio_pdrv_genirq. Currently, there's no user of this driver in the
> > > mainline kernel.
> > I want to suggest to rename uio_pdrv_genirq to uio_genirq instead.  In
> > my eyes this would be more clear.  IMHO the pdrv suffix doesn't yield
> > more clearity because it is only used in a certain namespace---namely
> > that of platform devices.  So e.g.
> > 
> > 	/sys/bus/platform/devices/uio_pdrv.0
> > 
> > isn't any better than
> > 
> > 	/sys/bus/platform/devices/uio.0
> 
> Well, I just want to avoid using the generic "uio" identifier for a
> single driver. A sysfs entry like this last one looks like a kind of
> "standard way" how a UIO platform device driver should be done.
I wonder that you don't have this impression with "uio_pdrv".

>                                                                 I'd like
> to avoid that impression. It can be "uio_pdrv" or "uio_pdrv_genirq", but
> there's no standard "uio" way of handling platform devices.
I thought the driver in discussion is kind of a standard way to create a
platform driver using uio.
(At least you called it "generic UIO platform device driver" above :-)

> > 
> > .  Looking at the name of other platform drivers using
> > 
> > 	git grep -E '_pdrv(_.*)?"' 
> > 
> > I get three false positives[1] and uio_pdrv_genirq (driver and some
> > users in arch/sh/kernel/cpu/sh4a/setup-sh7343.c).  So the _pdrv suffix
> > doesn't seem very common.
> 
> I don't really understand what you mean here.
I tried to point out that uio_pdrv_genirq is (probably) the only
platform driver that has _pdrv in its name.

Best regards
Uwe
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