Re: [linux-dvb] bug in locking patch for dvb ca en50221 driver

Re: [linux-dvb] bug in locking patch for dvb ca en50221 driver

[Mauro Carvalho Chehab]

Hi Matthias,

On Tue, 7 Oct 2008 16:36:30 +0200
Matthias Dahl <mldvb@mortal-soul.de> wrote:

> Hello Mauro/Andreas.
> 
> Unfortunately the patch I sent a few weeks ago introduces a _very_ infrequent 
> timeout in dvb_ca_en50221_io_write which I have to investigate. I don't like 
> the idea of just increasing the timeout. But I am currently quite busy 
> because I have a deadline for a university project to meet. So please don't 
> sent the patch upstream until I have had a chance to look things over and 
> correct the situation. Thanks and sorry for the inconvenience but I haven't 
> run into this bug before and it's (at least on my machine) not so easy to 
> trigger.

Ok.

I removed this patch from my submit queue on my -git trees locally. Please,
let me know when you have a solution for this, in order to allow me to submit
both patches.

Cheers,
Mauro

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Re: [linux-dvb] bug in locking patch for dvb ca en50221 driver

[Mauro Carvalho Chehab]

Hi Matthias,

On Tue, 7 Oct 2008 16:36:30 +0200
Matthias Dahl <mldvb@mortal-soul.de> wrote:

> Hello Mauro/Andreas.
> 
> Unfortunately the patch I sent a few weeks ago introduces a _very_ infrequent 
> timeout in dvb_ca_en50221_io_write which I have to investigate. I don't like 
> the idea of just increasing the timeout. But I am currently quite busy 
> because I have a deadline for a university project to meet. So please don't 
> sent the patch upstream until I have had a chance to look things over and 
> correct the situation. Thanks and sorry for the inconvenience but I haven't 
> run into this bug before and it's (at least on my machine) not so easy to 
> trigger.

I still have this patch on my blacklist... It is applied just at the
development repository. Any news?

Author: Matthias Dahl <mldvb@mortal-soul.de>
Date:   Fri Sep 26 06:29:03 2008 -0300

    V4L/DVB (9054): implement proper locking in the dvb ca en50221 driver

Cheers,
Mauro

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Re: [linux-dvb] bug in locking patch for dvb ca en50221 driver

[Mauro Carvalho Chehab]

On Tue, 6 Jan 2009 19:40:45 +0100
Matthias Dahl <mldvb@mortal-soul.de> wrote:

> Hi Mauro.
> 
> I am absolutely sorry that it's been ages since my last mail regarding this 
> patch but life intervened in every way possible actually... and still does. 
> To make matters worse, we (luckily) switched to dvb-s, so I am unfortunately 
> no longer able make further tests if time would permit. :-(
> 
> I have used this patch on my machine for weeks after my last post and haven't 
> had any trouble with it. Still there seems to be a hard to hit race condition 
> now which would need further testing. Nevertheless IMHO the patch is a real 
> improvement to the situation because before one could frequently run into 
> issues... and now things work just fine most of the time.

Ok. I've added the patch on my queue for 2.6.29.

Cheers,
Mauro

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