linux-kernel - Re: [PATCH 2/6] v4l/dvb: fix Kconfig dependencies on VIDEO_CAPTURE

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Date:	Tue, 15 May 2012 07:47:22 -0300
From:	Mauro Carvalho Chehab <mchehab@...hat.com>
To:	mathieu.poirier@...aro.org
CC:	mchehab@...radead.org, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org, arnd@...db.de
Subject: Re: [PATCH 2/6] v4l/dvb: fix Kconfig dependencies on VIDEO_CAPTURE_DRIVERS

Em 15-05-2012 07:44, Mauro Carvalho Chehab escreveu:
> Em 03-05-2012 19:22, mathieu.poirier@...aro.org escreveu:
>> From: Arnd Bergmann <arnd@...db.de>
>>
>> Kconfig warns about unsatisfied dependencies of symbols that
>> are directly selected.
>>
>> Many capture drivers depend on DVB capture drivers, which
>> are hidden behind the CONFIG_DVB_CAPTURE_DRIVERS setting.
>>
>> The solution here is to enable DVB_CAPTURE_DRIVERS unconditionally
>> when both DVB and VIDEO_CAPTURE_DRIVERS are enabled.
>>
>> Signed-off-by: Arnd Bergmann <arnd@...db.de>
>> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
>> ---
>>  drivers/media/dvb/Kconfig |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/media/dvb/Kconfig b/drivers/media/dvb/Kconfig
>> index f6e40b3..c617996 100644
>> --- a/drivers/media/dvb/Kconfig
>> +++ b/drivers/media/dvb/Kconfig
>> @@ -29,7 +29,7 @@ config DVB_DYNAMIC_MINORS
>>  	  If you are unsure about this, say N here.
>>  
>>  menuconfig DVB_CAPTURE_DRIVERS
>> -	bool "DVB/ATSC adapters"
>> +	bool "DVB/ATSC adapters" if !VIDEO_CAPTURE_DRIVERS
>>  	depends on DVB_CORE
>>  	default y
>>  	---help---
> 
> No, this is not right. Users can select either DVB or V4L2 (or hybrid) 
> devices independently.
> 
> If now a warning is happening, is because something changed Kconfig
> behavior on some non-expected way.

I remember a similar bug in the past that it was solved by using a new
Kconfig dialect "visible if".

Not sure it this applies here.

> 
> Nack.
> 
> Regards,
> Mauro

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