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

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Message-Id: <1471510915-24838-1-git-send-email-zhangqing@rock-chips.com>
Date:	Thu, 18 Aug 2016 17:01:54 +0800
From:	Elaine Zhang <zhangqing@...k-chips.com>
To:	broonie@...nel.org
Cc:	huangtao@...k-chips.com, zyw@...k-chips.com, xxx@...k-chips.com,
	jay.xu@...k-chips.com, linux-kernel@...r.kernel.org,
	Elaine Zhang <zhangqing@...k-chips.com>
Subject: [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