linux-kernel - Re: [PATCH 5/7] regmap: Check if a register is writable instead of readable in regcache

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Message-ID: <20111116172246.GS29986@opensource.wolfsonmicro.com>
Date:	Wed, 16 Nov 2011 17:22:47 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>,
	Jonathan Cameron <jic23@...nel.org>,
	Michael Hennerich <michael.hennerich@...log.com>,
	linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
	device-drivers-devel@...ckfin.uclinux.org, drivers@...log.com
Subject: Re: [PATCH 5/7] regmap: Check if a register is writable instead of
 readable in regcache_read

On Wed, Nov 16, 2011 at 06:15:31PM +0100, Lars-Peter Clausen wrote:
> On 11/16/2011 06:12 PM, Mark Brown wrote:

> > We should at least check that we actually have a cached value there -
> > the cache is sparse after all.

> That's what the cache already does today, you recently change the rbtree
> implementation to return -ENOENT if there is no cached value.

Oh, sorry -  this is in the cache specific code isn't it?  In that case
yes the check is just totally redundant and can be removed on those
grounds alone.
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