linux-kernel - Re: 2.6.25-rc regression: bttv: oops on radio access (bisected)

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Message-ID: <20080401171051.724a9f75@gaivota>
Date:	Tue, 1 Apr 2008 17:10:51 -0300
From:	Mauro Carvalho Chehab <mchehab@...radead.org>
To:	Marcin Slusarz <marcin.slusarz@...il.com>
Cc:	Douglas Schilling Landgraf <dougsland@...il.com>,
	video4linux-list@...hat.com, linux-kernel@...r.kernel.org,
	"Rafael J. Wysocki" <rjw@...k.pl>, Morton <akpm@...gle.com>,
	Bongani Hlope <bonganilinux@...b.co.za>
Subject: Re: 2.6.25-rc regression: bttv: oops on radio access (bisected)

Hi Marcin

On Sun, 30 Mar 2008 18:20:49 +0200
Marcin Slusarz <marcin.slusarz@...il.com> wrote:

> Hi
> 2.6.25-rc7 kernel oopses on exec of "radio -c /dev/radio0".
> I bisected it down to:
> 
> 402aa76aa5e57801b4db5ccf8c7beea9f580bb1b is first bad commit
> commit 402aa76aa5e57801b4db5ccf8c7beea9f580bb1b
> Author: Douglas Schilling Landgraf <dougsland@...il.com>
> Date:   Thu Dec 27 22:20:58 2007 -0300
> 
>     V4L/DVB (6911): Converted bttv to use video_ioctl2
> 
>     Signed-off-by: Douglas Schilling Landgraf <dougsland@...il.com>
>     Signed-off-by: Mauro Carvalho Chehab <mchehab@...radead.org>
> 

There are three patches that are meant to fix the bugs with radio. On the tests
I did here, they worked, but the Bongani still points that the fixes didn't
solve for him.

On the tests I did here, the three patches seemed to work [1]. Maybe you could
test with those patches and post us some results.

There are three patches meant to fix several issues caused by the conversion: 

http://git.kernel.org/?p=linux/kernel/git/mchehab/v4l-dvb.git;a=commitdiff;h=bdd38d9b5c6365ea004df6d8a183dd1344b4801f
http://git.kernel.org/?p=linux/kernel/git/mchehab/v4l-dvb.git;a=commitdiff;h=055a6282cabd311cf010a5a83f0494558504f7d0
http://git.kernel.org/?p=linux/kernel/git/mchehab/v4l-dvb.git;a=commitdiff;h=6e07ff78274752fe812a1e8bddb6013a278e62e8

Could you test please and give us some feedback?

[1] Yet, I've discovered recently that the hardware I use for testing PCI
devices is broken. Probably, my motherboard chipset is damaged, since I'm
getting intermittent bugs on several parts of the machine - even with stable
kernels - so my tests with bttv aren't conclusive.

Cheers,
Mauro
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