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Re: [PATCH 1/7] Adding empia base driver

From:  Mauro Carvalho Chehab <mchehab-AT-infradead.org>
To:  Hans Verkuil <hverkuil-AT-xs4all.nl>
Subject:  Re: [PATCH 1/7] Adding empia base driver
Date:  Sun, 2 Nov 2008 02:27:28 -0200
Message-ID:  <20081102022728.68e5e564@pedra.chehab.org>
Cc:  "Markus Rechberger" <mrechberger-AT-gmail.com>, "Linux Kernel Mailing List" <linux-kernel-AT-vger.kernel.org>, em28xx <em28xx-AT-mcentral.de>, acano-AT-fastmail.fm, "Andre Kelmanson" <akelmanson-AT-gmail.com>, "Bouwsma Barry" <freebeer.bouwsma-AT-gmail.com>, "Dan Kreiser" <kreiser-AT-informatik.hu-berlin.de>, "Frank Neuber" <fn-AT-kernelport.de>, "Jelle de Jong" <jelledejong-AT-powercraft.nl>, "John Stowers" <john.stowers.lists-AT-gmail.com>, "Lukas Kuna" <lukas.kuna-AT-evkanet.net>, "Stefan Vonolfen" <stefan.vonolfen-AT-gmail.com>, "Stephan Berberig" <s.berberig-AT-arcor.de>, "Thomas Giesecke" <thomas.giesecke-AT-ibgmbh-naumburg.de>, "Vitaly Wool" <vwool-AT-ru.mvista.com>, "Zhenyu Wang" <zhen78-AT-gmail.com>, v4l <video4linux-list-AT-redhat.com>, linux-dvb-AT-linuxtv.org, greg-AT-kroah.com, Alan Cox <alan-AT-lxorguk.ukuu.org.uk>
Archive-link:  Article, Thread

On Sat, 1 Nov 2008 14:59:17 +0100
Hans Verkuil <hverkuil@xs4all.nl> wrote:

> Hi Markus,
> 
> As promised I've done a review of your empia driver and looked at what 
> needs to be done to get it into the kernel.
> 
> First of all, I've no doubt that your empia driver is better and 
> supports more devices than the current em28xx driver. I also have no 
> problem adding your driver separate from the current driver. It's been 
> done before (certain networking drivers spring to mind) and while 
> obviously not ideal I expect that the older em28xx driver can probably 
> be removed after a year or something like that.
> 
> In my opinion it's pretty much hopeless trying to convert the current 
> em28xx driver into what you have. It's a huge amount of work that no 
> one wants to do and (in this case) with very little benefit. Of course, 
> Mauro has the final say in this.
> 

Both upstream and the 4 duplicated drivers have similar functionality. Also,
the upstream driver is actively maintained. So, there's no sense on accepting
those duplicated drivers.

Also, just replacing one existing driver by a newer one will cause regressions
on some already fixed bugs and remove some improvements that the upstream driver
suffered.

If there's a bug or a lack of functionality on em28xx, cx25843, xc5000 or
tuner-xc2028, it is just a matter of submitting patches fixing those bugs or
adding newer features.

Cheers,
Mauro


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