speakup_dectlk broken on Linux kernel 2.6.38 and greater

[John Heim]

I just wrote a patch for this over the weekend.  Give me 24 hours and I can 
post it to this list. You'll need to compile a new kernel though.  Or, if 
you're a debian user, you can try the 3.2.2 amd64 kernel package I built.

http://www.math.wisc.edu/~jheim/downloads/linux-image-3.2.2-08_3.2.2-08-10.00.Custom_amd64.deb

That package will only be useful to people running debian on 64 bit 
machines.  I have no access to other flavors of linux but I can probably 
make a 32 bit kernel by next weekend.

I created something of a stir on the linux-kernel list last weekend asking 
about this bug. I hope Samuel isn't ticked off with me. More on that in 
another message though.

----- Original Message ----- 
From: "Devon Stewart" <devonst17 at gmail.com>
To: <speakup at braille.uwo.ca>
Sent: Monday, March 05, 2012 1:45 PM
Subject: speakup_dectlk broken on Linux kernel 2.6.38 and greater


> Hello list!
>
> At the recommendation of Kirk Reiser, I'm bringing my problem to this 
> list. A blind friend of mine has a Dectalk USB, and it functions quite 
> well in serial mode. Unfortunately, something changed in the kernel 
> between 2.6.32 and 2.6.38, and now the speakup_dectlk module produces the 
> following cryptic error on boot:
>
>> FATAL: Error inserting speakup_dectlk 
>> (/lib/modules/3.2.0-1-686-pae/kernel/drivers/staging/speakup/speakup_dectlk.ko): 
>> No such device
>
> I've looked at the difference in the module source between the two kernel 
> versions, and have found that nothing substantial has changed, mostly 
> formatting changes. Kirk informed me that there was a change in how serial 
> ports are allocated, and that there is a one-line fix that can be made in 
> the probing code. I'm more than willing to do this, but I lack the 
> knowledge to locate the fix, additionally I don't know how to recompile 
> just a single kernel module, and recompiling the whole kernel seems 
> overkill. Additionally, this fix should be pushed to the kernel source, so 
> all may benefit.
>
> He has been fine using 2.6.32, but as someone who maintains his machine, 
> it is apparent to me that at some point this is going to become a real 
> emergency, instead of just a "nice-to-have".
>
> Help would be greatly appreciated, thank you for your time,
> -Devon
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