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Subject[PATCH 05/10] mfd: arizona: Check errors from regcache_sync()
Date
If the control bus is unrelabile we may hit errors during regcache_sync(),
especially given that it tends to be one the most dense bursts of I/O in
many systems.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
drivers/mfd/arizona-core.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index a8b8a7b..1ab02a7 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -239,7 +239,12 @@ static int arizona_runtime_resume(struct device *dev)
return ret;
}

- regcache_sync(arizona->regmap);
+ ret = regcache_sync(arizona->regmap);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to restore register cache\n");
+ regulator_disable(arizona->dcvdd);
+ return ret;
+ }

return 0;
}
--
1.7.10.4


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