linux-kernel - Re: [alsa-devel] [RFC PATCH] ASoC: Modify check condition of multiple bindings of components

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Message-ID: <20151015121035.GE14956@sirena.org.uk>
Date:	Thu, 15 Oct 2015 13:10:35 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Koro Chen <koro.chen@...iatek.com>, alsa-devel@...a-project.org,
	srv_heupstream@...iatek.com, tiwai@...e.de, s.hauer@...gutronix.de,
	linux-kernel@...r.kernel.org, lgirdwood@...il.com,
	linux-mediatek@...ts.infradead.org, p.zabel@...gutronix.de,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [alsa-devel] [RFC PATCH] ASoC: Modify check condition of
 multiple bindings of components

On Wed, Oct 14, 2015 at 11:00:01AM +0200, Lars-Peter Clausen wrote:

> It was never intended that it is possible to bind a component to multiple
> cards. That it was possible was a bug that was overlooked and some people
> tried to do it which caused apparently random crashes later on, caused by
> the data structure corruption. This is why we added the check to catch this
> kind of mistake early and to avoid the crashes.

This is true, but I do think it's something that we should have some
story on supporting for some of this hardware that has a bunch of
channels in one IP block that can't really interact with each other.
It's going to make it a lot easier for people to think about the
hardware and how to describe it.

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