linux-kernel - Re: [PATCH/RFC] parport_pc: remove ancient, overeager quirk that disables EPP support on many chipsets

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Date:	Thu, 15 Sep 2011 12:16:43 +0200
From:	Greg KH <greg@...ah.com>
To:	Leopold Palomo-Avellaneda <leo@...xarxa.net>
Cc:	linux-kernel@...r.kernel.org, linux-parport@...ts.infradead.org,
	630593@...s.debian.org, Nicos Gollan <gollan@...ormatik.uni-kl.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Alexander Gordeev <lasaine@....cs.msu.su>,
	Jonathan Nieder <jrnieder@...il.com>
Subject: Re: [PATCH/RFC] parport_pc: remove ancient, overeager quirk that
 disables EPP support on many chipsets

On Thu, Sep 15, 2011 at 11:33:18AM +0200, Leopold Palomo-Avellaneda wrote:
> Hi,
> 
> there's a bug in the parport module that have been reported (in another 
> places) some time ago [1]. Also, this bug was reported at Redhat [2], but 
> nobody follow the report and it was closed.
> 
> As Adam baked said [1] :
> 
> <quote>
> A long time ago (~ 10 years), Intel produced a chipset that 
> included broken EPP support. The Linux parport driver was written to detect 
> such a chipset and disable EPP support on it. Unfortunately the test that was 
> written gives false positives for many current chipsets and no-one seems to 
> know exactly what the problem hardware was, let alone have a sample of it to 
> see if a better test can be written. After such a long time it is probably 
> appropriate to just remove the test (on average it does more harm than good) 
> however you are correct in asserting the driver is unmaintained so no-one is 
> bothering to fix it.
> </quote>
> 
> I have applied the patch to the standard debian kernel and vanilla kernels and 
> runs perfectly. The patch simply erases a check. Applied to some Dell 
> hardware, now the EPP mode is detected and, after some initial tests it's 
> working.
> 
> Please, apply the patch.

Please resend it with the proper Signed-off-by: line, as described by
Documentation/SubmittingPatches and we will be glad to consider it.

thanks,

greg k-h
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