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[PATCH 0/0] regmap: drop cache if the bus transfer error

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  [PATCH 0/0] regmap: drop cache if the bus transfer error Elaine Zhang <zhangqing@rock-chips.com> - 2016-08-18 11:10 +0200
    Re: [PATCH 0/0] regmap: drop cache if the bus transfer error Mark Brown <broonie@kernel.org> - 2016-08-18 11:50 +0200

#1465026 — [PATCH 0/0] regmap: drop cache if the bus transfer error

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.

I think the regmap should handle that gracefully,
and may be my modify is not the best way.
But as I described is how to slove that problem.

Elaine Zhang (1):
  regmap: drop cache if the bus transfer error

 drivers/base/regmap/regmap.c | 2 ++
 1 file changed, 2 insertions(+)

-- 
1.9.1

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#1465052

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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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