From: Elaine Zhang <zhangqing@rock-chips.com>
To: broonie@kernel.org
Cc: huangtao@rock-chips.com, zyw@rock-chips.com, xxx@rock-chips.com,
jay.xu@rock-chips.com, linux-kernel@vger.kernel.org,
Elaine Zhang <zhangqing@rock-chips.com>
Subject: [PATCH 0/0] regmap: drop cache if the bus transfer error
Date: Thu, 18 Aug 2016 17:01:54 +0800 [thread overview]
Message-ID: <1471510915-24838-1-git-send-email-zhangqing@rock-chips.com> (raw)
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
next reply other threads:[~2016-08-18 9:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-18 9:01 Elaine Zhang [this message]
2016-08-18 9:01 ` [PATCH 0/1] " Elaine Zhang
2016-08-18 9:42 ` [PATCH 0/0] " Mark Brown
-- strict thread matches above, loose matches on Subject: below --
2016-08-18 6:43 Elaine Zhang
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