linux-kernel - Re: BUG in 2.6.22-rc2-mm1: Parts of Alsa sound architecture broken

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Date:	Tue, 05 Jun 2007 16:17:53 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Uwe Bugla <uwe.bugla@....de>, linux-kernel@...r.kernel.org,
	Jaroslav Kysela <perex@...e.cz>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Jens Axboe <jens.axboe@...cle.com>
Subject: Re: BUG in 2.6.22-rc2-mm1: Parts of Alsa sound architecture broken

At Tue, 5 Jun 2007 15:25:07 +0200 (MEST),
Jan Engelhardt wrote:
> 
> 
> >> > >Well, I find the change of CONFIG_SND to menuconfig is fine, too.
> >> > >But CONFIG_SND_PCI_DRIVERS and others don't make much sense to me.
> >> > >How is it useful at all?
> >> > 
> >> > Hah, I just tell you some of my own experience.
> >> > In summer 2003, I bought the last new machine, and it got these
> >> > shiny new ports they like to call USB. :)
> >> > I did not have much use for it, but I left it on - you never know
> >> > what standard next is the big win of the decade. And actually,
> >> > it did not took long (well, summer 2005) to get my first USB device.
> >> > Still, I am hell as sure I do not have USB-based sound devices
> >> > anytime soon, so it would be cool to deactivate the whole usbsound
> >> > menu at once. I think I said that in the patch description, did not I?
> >> 
> >> But it's not cool to add an extra config item just for that, too.
> >> And, the structure of menuconfig-if-endif is uglier than menu-endmenu.
> >> That's why I feel a bit uneasy, although all these are a matter of
> >> taste...
> >
> >Forgot to mention about another annoying drawback.  Because of the new
> >CONFIG_SND_*_DRIVERS, you'll have to re-select all belonging
> >CONFIG_SND_*, even via config oldconfig.  Putting the dependency on
> >the top seems to reset the values defined in the old .config.
> 
> Well, *I* (previously) submitted patches with  "default y", but Jens 
> Axboe [http://lkml.org/lkml/2007/5/12/164] disagreed heavily enough to 
> stop that practice.

Hm, I guess Jens didn't know about this side-effect.

When I don't set "default y", I'll be asked for each belonging item
even though I chose "y" manually for the top config
(CONFIG_*_DRIVERS).

Strangely, setting "default y" has no this effect...


Takashi
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