From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753793AbeAOHuU (ORCPT + 1 other); Mon, 15 Jan 2018 02:50:20 -0500 Received: from mx2.suse.de ([195.135.220.15]:36722 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751253AbeAOHuT (ORCPT ); Mon, 15 Jan 2018 02:50:19 -0500 Date: Mon, 15 Jan 2018 08:50:17 +0100 Message-ID: From: Takashi Iwai To: "Randy Dunlap" Cc: "moderated for non-subscribers" , "LKML" , "Jaroslav Kysela" Subject: Re: [PATCH] sound/pci/hda: depends on instead of select for INPUT In-Reply-To: <254bab8e-5629-0dc0-5a4e-9a010abf9ad8@infradead.org> References: <254bab8e-5629-0dc0-5a4e-9a010abf9ad8@infradead.org> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 Emacs/25.3 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: On Mon, 15 Jan 2018 06:11:56 +0100, Randy Dunlap wrote: > > From: Randy Dunlap > > Drivers should not 'select' a subsystem. Instead they should depend > on it. If the subsystem is disabled, the user probably did that for > a purpose and one driver shouldn't be changing that. > > This also makes all sound/ drivers consistent w.r.t depending on INPUT > instead of selecting it. > > Signed-off-by: Randy Dunlap > Cc: Jaroslav Kysela > Cc: Takashi Iwai > Cc: alsa-devel@alsa-project.org (moderated for non-subscribers) > --- > sound/pci/hda/Kconfig | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > --- lnx-415-rc8.orig/sound/pci/hda/Kconfig > +++ lnx-415-rc8/sound/pci/hda/Kconfig > @@ -87,8 +87,8 @@ config SND_HDA_PATCH_LOADER > > config SND_HDA_CODEC_REALTEK > tristate "Build Realtek HD-audio codec support" > + depends on INPUT > select SND_HDA_GENERIC > - select INPUT This would break if INPUT=m and SND_HDA_CODEC_REALTEK=y. Usually, we take a trick like depends on INPUT=y || INPUT=SND_HDA_CODEC_REALTEK But, looking at the change that introduced the dependency (commit 33f4acd3b214), the code doesn't necessarily depend on INPUT at all. The select above was put there just because the random build with INPUT=m and SND_HDA_CODEC_REALTEK=y would break otherwise. The right fix in this case would be to replace IS_ENABLE(INPUT) with IS_REACHABLE(INPUT) instead. thanks, Takashi