linux-kernel - Re: [PATCH 0/0] regmap: drop cache if the bus transfer error

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Message-ID: <20160818094230.GN9347@sirena.org.uk>
Date:	Thu, 18 Aug 2016 10:42:30 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Elaine Zhang <zhangqing@...k-chips.com>
Cc:	huangtao@...k-chips.com, zyw@...k-chips.com, xxx@...k-chips.com,
	jay.xu@...k-chips.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/0] regmap: drop cache if the bus transfer error

On Thu, Aug 18, 2016 at 05:01:54PM +0800, Elaine Zhang wrote:
> regmap_write
>     ->_regmap_raw_write
>     -->regcache_write first and than use map->bus->write to wirte i2c or spi
>     But if the i2c or spi transfer failed, But the cache is updated, So if I use
>     regmap_read will get the cache data which is not the real register value.

Please don't send cover letters for single patches, if there is anything
that needs saying put it in the changelog of the patch or after the ---
if it's administrative stuff.  This reduces mail volume and ensures that 
any important information is recorded in the changelog rather than being
lost. 

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