From mboxrd@z Thu Jan  1 00:00:00 1970
From: Timur Tabi <timur@tabi.org>
Subject: Re: [PATCH 3/3] ASoC: fsl_ssi: remove register defaults
Date: Mon, 11 Jan 2016 19:23:54 -0600
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Cc: "Maciej S. Szmigiero" <mail@maciej.szmigiero.name>, Fabio Estevam <festevam@gmail.com>, "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>, Nicolin Chen <nicoleotsuka@gmail.com>, Xiubo Li <Xiubo.Lee@gmail.com>, Liam Girdwood <lgirdwood@gmail.com>, "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>, linux-kernel <linux-kernel@vger.kernel.org>
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Mark Brown wrote:
> regcache handles this fine, it's perfectly happy to just go and allocate
> the cache as registers get used (this is why the code that's doing the
> allocation exists...).  What is causing problems here is that the first
> access to the register is happening in interrupt context so we can't do
> a GFP_KERNEL allocation for it.

Considering how small and not-sparse the SSI register space is, would 
using REGCACHE_FLAT be appropriate?