Re: cx8802.ko module not being built with current HG tree

[Mauro Carvalho Chehab <mchehab@infradead.org>]

On Tue, 10 Feb 2009 21:31:59 +0100
Hans Verkuil <hverkuil@xs4all.nl> wrote:

> On Tuesday 10 February 2009 19:47:40 Mauro Carvalho Chehab wrote:
> > On Tue, 10 Feb 2009 10:25:26 -0800 (PST)
> >
> > Trent Piepho <xyzzy@speakeasy.org> wrote:
> > > On Tue, 10 Feb 2009, Eduard Huguet wrote:
> > > >     I don't have yet the buggy config, but the steps I was following
> > > > when I encounter the problem were the following:
> > > >         · hg clone http://linuxtv.org/hg/v4l-dvb
> > > >         · cd v4l-dvb
> > > >         · make menuconfig
> > >
> > > This is what I did too.  Just use the menuconfig or xconfig targets. 
> > > Maybe the kernel kconfig behavior has changed?
> >
> > Hmm... I did a test here with RHEL 2.6.18 kernel:
> >
> > $ make menuconfig
> > make -C /home/v4l/master/v4l menuconfig
> > make[1]: Entrando no diretório `/home/v4l/master/v4l'
> > /usr/src/kernels/2.6.18-125.el5-x86_64//scripts/kconfig/mconf ./Kconfig
> > #
> > # configuration written to .config
> > #
> >
> >
> > *** End of Linux kernel configuration.
> > *** Execute 'make' to build the kernel or try 'make help'.
> >
> > $ grep CX88 v4l/.config
> > CONFIG_VIDEO_CX88=m
> > CONFIG_VIDEO_CX88_ALSA=m
> > CONFIG_VIDEO_CX88_BLACKBIRD=m
> > CONFIG_VIDEO_CX88_DVB=m
> > CONFIG_VIDEO_CX88_MPEG=y
> > CONFIG_VIDEO_CX88_VP3054=m
> >
> > So, I got the buggy .config
> >
> > Another test with 2.6.27:
> >
> > $ make menuconfig
> > make -C /home/v4l/master/v4l menuconfig
> > make[1]: Entrando no diretório `/home/v4l/master/v4l'
> > ./scripts/make_kconfig.pl /usr/src/kernels/v2.6.27.4/
> > /usr/src/kernels/v2.6.27.4/ Preparing to compile for kernel version
> > 2.6.27
> > VIDEO_PXA27x: Requires at least kernel 2.6.29
> > USB_STV06XX: Requires at least kernel 2.6.28
> > /usr/src/kernels/v2.6.27.4.i5400//scripts/kconfig/mconf ./Kconfig
> > #
> > # configuration written to .config
> > #
> >
> >
> > *** End of Linux kernel configuration.
> > *** Execute 'make' to build the kernel or try 'make help'.
> >
> > make[1]: Saindo do diretório `/home/v4l/master/v4l'
> > [v4l@pedra master]$ grep CX88 v4l/.config
> > CONFIG_VIDEO_CX88=m
> > CONFIG_VIDEO_CX88_ALSA=m
> > CONFIG_VIDEO_CX88_BLACKBIRD=m
> > CONFIG_VIDEO_CX88_DVB=m
> > CONFIG_VIDEO_CX88_MPEG=m
> > CONFIG_VIDEO_CX88_VP3054=m
> >
> > With 2.6.27, everything is OK.
> >
> > So, it seems that a fix at some kernel between 2.6.22 and 2.6.27 changed
> > (or fixed) the Kconfig behaviour.
> >
> > I suspect that the better fix for this would be to run something like:
> >
> > cat .config|sed s,'=y','=m'
> >
> > For kernels older than 2.6.27.
> >
> > Maybe Hans can give us a hint on what kernel this issue were solved, with
> > his build environment.
> 
> 2.6.21 is wrong, 2.6.22 is right. Cause: dependency on VIDEOBUF_DMA_SG, 
> which has a dependency on CONFIG_HAS_DMA, which was apparently introduced 
> in 2.6.22 and didn't exist in 2.6.21.
> 
> This is fixed by the attached diff.

No, it didn't fix. I'm still getting this issue with 2.6.18.

Btw, on RHEL5 2.6.18 kernel, HAS_DMA does exist:

$ grep CONFIG_HAS_DMA /usr/src/kernels/2.6.18-125.el5-x86_64/.config 
CONFIG_HAS_DMA=y

Also, the original reporter were for an Ubuntu kernel 2.6.22.
> 
> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
> 
> BTW, all the scripts I use to setup and run the build environment are 
> available here: http://www.xs4all.nl/%7Ehverkuil/logs/scripts.tar.bz2
> 
> Regards,
> 
> 	Hans
> 




Cheers,
Mauro