From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from h5.dl5rb.org.uk ([81.2.74.5]:35637 "EHLO duck.linux-mips.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754488Ab1FXLQj (ORCPT ); Fri, 24 Jun 2011 07:16:39 -0400 Date: Fri, 24 Jun 2011 12:16:08 +0100 From: Ralf Baechle To: Takashi Iwai Cc: Mauro Carvalho Chehab , Jaroslav Kysela , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org, linux-mips@linux-mips.org Subject: Re: [PATCH] SOUND: Fix non-ISA_DMA_API build failure Message-ID: <20110624111608.GA6327@linux-mips.org> References: <20110623144750.GA10180@linux-mips.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: List-ID: Sender: 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. > Also, adlib driver is really only for ISA, so I see no big reason to > allow this built for non-ISA. With the patch applied: [...] menuconfig SND_ISA bool "ISA sound devices" depends on ISA [...] if SND_ISA config SND_ADLIB tristate "AdLib FM card" select SND_OPL3_LIB [...] So the Adlib driver will still only be built with ISA enabled. The only thing that makes the Adlib driver different from all the others in the ifdef SND_ISA ... endif bracket is that it does not directly or indirectly use the ISA DMA API and that's in the end the reason why sound/isa/Kconfig needs to be changed. I originally approach this a different way but now that I'm explaining the details I notice that it probably makes sense to split this patch into two: o The drivers/media/radio/Kconfig part should be applied for 3.0 and maybe -stable. o The sound/isa/Kconfig part is basically only fixing the dependency for the Adlib driver allowing it to be built on non-ISA_DMA_API system and is material for the next release after 3.0. If you agree I'm going to repost the patch with aproprite log messages. Ralf