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| author | Jarkko Nikula <jarkko.nikula@linux.intel.com> | 2014-09-16 14:04:14 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2014-09-16 09:53:40 -0700 |
| commit | f29a43206ae1adfadbb344f5ef9bc200784f9d61 (patch) | |
| tree | 4bac109bdbad260dd324a4d70cff6214a3c8cd0b /drivers/base/regmap/regcache.c | |
| parent | 7d1311b93e58ed55f3a31cc8f94c4b8fe988a2b9 (diff) | |
| download | linux-f29a43206ae1adfadbb344f5ef9bc200784f9d61.tar.bz2 | |
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>
Diffstat (limited to 'drivers/base/regmap/regcache.c')
| -rw-r--r-- | drivers/base/regmap/regcache.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 29b4128da0b0..da7b3bfd4d7f 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -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; |