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

Greg KH greg at kroah.com
Thu Sep 15 06:16:43 EDT 2011

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.


greg k-h

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