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regmap: cache: Do not fail silently from regcache_sync calls 

Call stack of regcache_sync calls may not emit any error message even if
operation was cancelled due an error in I/O driver. One such a silent error
is for instance if I2C bus driver doesn't receive ACK from the I2C device
and returns -EREMOTEIO.

Since many users of regcache_sync() don't check and print the error there is
no any indication that HW registers are potentially out of sync.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Jarkko Nikula 2014-09-16 14:04:14 +03:00 committed by Mark Brown
parent 7d1311b93e
commit f29a43206a
1 changed files with 11 additions and 2 deletions
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13
drivers/base/regmap/regcache.c
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@ -269,8 +269,11 @@ static int regcache_default_sync(struct regmap *map, unsigned int min,
map->cache_bypass = 1;
ret = _regmap_write(map, reg, val);
map->cache_bypass = 0;
if (ret)
if (ret) {
dev_err(map->dev, "Unable to sync register %#x. %d\n",
reg, ret);
return ret;
}
dev_dbg(map->dev, "Synced register %#x, value %#x\n", reg, val);
}
@ -615,8 +618,11 @@ static int regcache_sync_block_single(struct regmap *map, void *block,
ret = _regmap_write(map, regtmp, val);
map->cache_bypass = 0;
if (ret != 0)
if (ret != 0) {
dev_err(map->dev, "Unable to sync register %#x. %d\n",
regtmp, ret);
return ret;
}
dev_dbg(map->dev, "Synced register %#x, value %#x\n",
regtmp, val);
}
@ -641,6 +647,9 @@ static int regcache_sync_block_raw_flush(struct regmap *map, const void **data,
map->cache_bypass = 1;
ret = _regmap_raw_write(map, base, *data, count * val_bytes);
if (ret)
dev_err(map->dev, "Unable to sync registers %#x-%#x. %d\n",
base, cur - map->reg_stride, ret);
map->cache_bypass = 0;