linux-kernel - Re: [PATCH] SOUND: Fix non-ISA_DMA

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Date:	Fri, 24 Jun 2011 08:35:22 -0300
From:	Mauro Carvalho Chehab <mchehab@...radead.org>
To:	Ralf Baechle <ralf@...ux-mips.org>
CC:	Takashi Iwai <tiwai@...e.de>, Jaroslav Kysela <perex@...ex.cz>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org, linux-mips@...ux-mips.org
Subject: Re: [PATCH] SOUND: Fix non-ISA_DMA_API build failure

Em 24-06-2011 08:16, Ralf Baechle escreveu:
> On Fri, Jun 24, 2011 at 10:26:13AM +0200, Takashi Iwai wrote:
> 
>> Hrm...  I still don't understand why ES18XX or others were selected at
>> the first place.  Isn't it covered by the conditional in
>> sound/isa/Kconfig like below?
>>
>> ================================================================
>> menuconfig SND_ISA
>> 	bool "ISA sound devices"
>> 	depends on ISA && ISA_DMA_API
>> ...
>> if SND_ISA
>> ...
>> config SND_ES18XX
>> 	tristate "Generic ESS ES18xx driver"
>> ...
>> endif	# SND_ISA
>> ================================================================
>>
>> Isn't SND_ISA=n in your case although ISA_DMA_API=n?
> 
> The answer is hidden in this Kconfig warning:
> 
> warning: (RADIO_MIROPCM20) selects SND_ISA which has unmet direct dependencies (SOUND && !M68K && SND && ISA && ISA_DMA_API)
> 
> This is due to the following in drivers/media/radio/Kconfig:
> 
> config RADIO_MIROPCM20
>         tristate "miroSOUND PCM20 radio"
>         depends on ISA && VIDEO_V4L2 && SND
>         select SND_ISA
>         select SND_MIRO
> 
> So SND_ISA gets forced on even though the dependency on ISA_DMA_API is not
> fulfilled.  That's solved by adding the dependency on ISA_DMA_API to
> RADIO_MIROPCM20.

Another option would be to convert the two above selects into depends on.

Cheers,
Mauro
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